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[DO NOT MERGE] NLL crater run 2: deny NLL warning lints in migrate mode #60914

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[DO NOT MERGE] NLL crater run 2: deny NLL warning lints in migrate mode #60914

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lqd
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@lqd lqd commented May 17, 2019

This keeps the borrowck migrate mode as the default (and thus does not suppress regionck errors like full NLLs would), but does not downgrade the errors ignored by AST borrowck into warnings, for the 2nd crater run needed for #60680.

For the previous runs, we also specified crater to cap-lints=warn, we might want this again this time ?

r? @ghost

cc @pnkfelix, @Centril, @matthewjasper

@lqd lqd mentioned this pull request May 17, 2019
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The job x86_64-gnu-llvm-6.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log. 
travis_time:end:01d9a8a2:start=1558095920146174210,finish=1558095920880119194,duration=733944984
$ git checkout -qf FETCH_HEAD
travis_fold:end:git.checkout

Encrypted environment variables have been removed for security reasons.
See https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions
$ export SCCACHE_BUCKET=rust-lang-ci-sccache2
$ export SCCACHE_REGION=us-west-1
$ export GCP_CACHE_BUCKET=rust-lang-ci-cache
$ export AWS_ACCESS_KEY_ID=AKIA46X5W6CZEJZ6XT55
---
[01:06:51] 
[01:06:51] running 5533 tests
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[01:10:02] failures:
[01:10:02] 
[01:10:02] ---- [ui] ui/borrowck/borrowck-anon-fields-variant.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] - warning[E0503]: cannot use `y` because it was mutably borrowed
[01:10:02] + error[E0503]: cannot use `y` because it was mutably borrowed
[01:10:02] 3    |
[01:10:02] 3    |
[01:10:02] 4 LL |       Foo::Y(ref mut a, _) => a,
[01:10:02] 9 ...
[01:10:02] 9 ...
[01:10:02] 10 LL |     *a += 1;
[01:10:02] -    |
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 15 
[01:10:02] 15 
[01:10:02] 16 error[E0503]: cannot use `y` because it was mutably borrowed
[01:10:02] 17   --> $DIR/borrowck-anon-fields-variant.rs:37:7
[01:10:02] 
[01:10:02] 37 LL |     *a += 1;
[01:10:02] 38    |     ------- first borrow later used here
[01:10:02] - error: aborting due to 2 previous errors
[01:10:02] + error: aborting due to 3 previous errors
[01:10:02] 41 
[01:10:02] 42 Some errors have detailed explanations: E0499, E0503.
[01:10:02] 42 Some errors have detailed explanations: E0499, E0503.
[01:10:02] 43 For more information about an error, try `rustc --explain E0499`.
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-anon-fields-variant/borrowck-anon-fields-variant.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args borrowck/borrowck-anon-fields-variant.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/borrowck/borrowck-anon-fields-variant.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-anon-fields-variant" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-anon-fields-variant/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0503]: cannot use `y` because it was mutably borrowed
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-anon-fields-variant.rs:17:7
[01:10:02]    |
[01:10:02] LL |       Foo::Y(ref mut a, _) => a,
[01:10:02]    |              --------- borrow of `y.0` occurs here
[01:10:02] ...
[01:10:02] LL |       Foo::Y(_, ref mut b) => b,
[01:10:02]    |       ^^^^^^^^^^^^^^^^^^^^ use of borrowed `y.0`
[01:10:02] ...
[01:10:02] LL |     *a += 1;
[01:10:02] 
[01:10:02] error[E0503]: cannot use `y` because it was mutably borrowed
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-anon-fields-variant.rs:37:7
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |       Foo::Y(ref mut a, _) => a,
[01:10:02]    |              --------- borrow of `y.0` occurs here
[01:10:02] ...
[01:10:02] LL |       Foo::Y(ref mut b, _) => b, //~ ERROR cannot use `y`
[01:10:02]    |       ^^^^^^^^^^^^^^^^^^^^ use of borrowed `y.0`
[01:10:02] ...
[01:10:02] LL |     *a += 1;
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0499]: cannot borrow `y.0` as mutable more than once at a time
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |       Foo::Y(ref mut a, _) => a,
[01:10:02]    |              --------- first mutable borrow occurs here
[01:10:02] ...
[01:10:02] LL |       Foo::Y(ref mut b, _) => b, //~ ERROR cannot use `y`
[01:10:02]    |              ^^^^^^^^^ second mutable borrow occurs here
[01:10:02] ...
[01:10:02] LL |     *a += 1;
[01:10:02]    |     ------- first borrow later used here
[01:10:02] error: aborting due to 3 previous errors
[01:10:02] 
[01:10:02] Some errors have detailed explanations: E0499, E0503.
[01:10:02] For more information about an error, try `rustc --explain E0499`.
---
[01:10:02] 
[01:10:02] 328 LL |         drop(x);
[01:10:02] 329    |              - mutable borrow later used here
[01:10:02] 330 
[01:10:02] - warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:10:02] + error[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:10:02] 333    |
[01:10:02] 334 LL |             let x = &mut block;
[01:10:02] 
[01:10:02] 338 ...
[01:10:02] 338 ...
[01:10:02] 339 LL |             drop(x);
[01:10:02] 340    |                  - mutable borrow later used here
[01:10:02] -    |
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 344 
[01:10:02] - warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:10:02] + error[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:10:02] 347    |
[01:10:02] 348 LL |             let x = &mut block;
[01:10:02] 
[01:10:02] 352 ...
---
[01:10:02] 359 error[E0382]: use of moved value: `x`
[01:10:02] 360   --> $DIR/borrowck-describe-lvalue.rs:282:22
[01:10:02] 
[01:10:02] 366    |
[01:10:02] 367    = note: move occurs because `x` has type `std::vec::Vec<i32>`, which does not implement the `Copy` trait
[01:10:02] - error: aborting due to 30 previous errors
[01:10:02] + error: aborting due to 32 previous errors
[01:10:02] 370 
[01:10:02] 371 Some errors have detailed explanations: E0382, E0499, E0502, E0503.
[01:10:02] 371 Some errors have detailed explanations: E0382, E0499, E0502, E0503.
[01:10:02] 372 For more information about an error, try `rustc --explain E0382`.
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-describe-lvalue/borrowck-describe-lvalue.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args borrowck/borrowck-describe-lvalue.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/borrowck/borrowck-describe-lvalue.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-describe-lvalue" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-describe-lvalue/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0499]: cannot borrow `x` as mutable more than once at a time
[01:10:02]    |
[01:10:02] LL |             let y = &mut x;
[01:10:02]    |                     ------ first mutable borrow occurs here
[01:10:02]    |                     ------ first mutable borrow occurs here
[01:10:02] LL |             &mut x; //~ ERROR cannot borrow `x` as mutable more than once at a time
[01:10:02]    |             ^^^^^^ second mutable borrow occurs here
[01:10:02] LL |             *y = 1;
[01:10:02]    |             ------ first borrow later used here
[01:10:02] 
[01:10:02] error[E0499]: cannot borrow `x` as mutable more than once at a time
[01:10:02]    |
[01:10:02] LL |                    let y = &mut x;
[01:10:02]    |                            ------ first mutable borrow occurs here
[01:10:02]    |                            ------ first mutable borrow occurs here
[01:10:02] LL |                    &mut x; //~ ERROR cannot borrow `x` as mutable more than once at a time
[01:10:02]    |                    ^^^^^^ second mutable borrow occurs here
[01:10:02] LL |                    *y = 1;
[01:10:02]    |                    ------ first borrow later used here
[01:10:02] 
[01:10:02] error: captured variable cannot escape `FnMut` closure body
[01:10:02]    |
[01:10:02] LL |              || {
[01:10:02] LL |              || {
[01:10:02]    |               - inferred to be a `FnMut` closure
[01:10:02] LL | /                || { //~ ERROR captured variable cannot escape `FnMut` closure body
[01:10:02] LL | |                    let y = &mut x;
[01:10:02] LL | |                    &mut x; //~ ERROR cannot borrow `x` as mutable more than once at a time
[01:10:02] LL | |                    *y = 1;
[01:10:02] LL | |                    drop(y);
[01:10:02]    | |_________________^ returns a closure that contains a reference to a captured variable, which then escapes the closure body
[01:10:02]    |
[01:10:02]    |
[01:10:02]    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:10:02]    = note: ...therefore, they cannot allow references to captured variables to escape
[01:10:02] 
[01:10:02] error[E0503]: cannot use `f.x` because it was mutably borrowed
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |         let x = f.x();
[01:10:02]    |                 - borrow of `f` occurs here
[01:10:02] LL |         f.x; //~ ERROR cannot use `f.x` because it was mutably borrowed
[01:10:02]    |         ^^^ use of borrowed `f`
[01:10:02] LL |         drop(x);
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `g.0` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = g.x();
[01:10:02] LL |         let x = g.x();
[01:10:02]    |                 - borrow of `g` occurs here
[01:10:02] LL |         g.0; //~ ERROR cannot use `g.0` because it was mutably borrowed
[01:10:02]    |         ^^^ use of borrowed `g`
[01:10:02] LL |         drop(x);
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `h.0` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut h.0;
[01:10:02] LL |         let x = &mut h.0;
[01:10:02]    |                 -------- borrow of `h.0` occurs here
[01:10:02] LL |         h.0; //~ ERROR cannot use `h.0` because it was mutably borrowed
[01:10:02]    |         ^^^ use of borrowed `h.0`
[01:10:02] LL |         drop(x);
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `e.0` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = e.x();
[01:10:02]    |                 - borrow of `e` occurs here
[01:10:02] LL |         match e {
[01:10:02] LL |         match e {
[01:10:02] LL |             Baz::X(value) => value //~ ERROR cannot use `e.0` because it was mutably borrowed
[01:10:02]    |                    ^^^^^ use of borrowed `e`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `u.a` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut u.a;
[01:10:02] LL |         let x = &mut u.a;
[01:10:02]    |                 -------- borrow of `u.a` occurs here
[01:10:02] LL |         u.a; //~ ERROR cannot use `u.a` because it was mutably borrowed
[01:10:02]    |         ^^^ use of borrowed `u.a`
[01:10:02] LL |         drop(x);
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `f.x` because it was mutably borrowed
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |         let x = f.x();
[01:10:02]    |                 - borrow of `*f` occurs here
[01:10:02] LL |         f.x; //~ ERROR cannot use `f.x` because it was mutably borrowed
[01:10:02]    |         ^^^ use of borrowed `*f`
[01:10:02] LL |         drop(x);
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `g.0` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = g.x();
[01:10:02] LL |         let x = g.x();
[01:10:02]    |                 - borrow of `*g` occurs here
[01:10:02] LL |         g.0; //~ ERROR cannot use `g.0` because it was mutably borrowed
[01:10:02]    |         ^^^ use of borrowed `*g`
[01:10:02] LL |         drop(x);
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `h.0` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut h.0;
[01:10:02] LL |         let x = &mut h.0;
[01:10:02]    |                 -------- borrow of `h.0` occurs here
[01:10:02] LL |         h.0; //~ ERROR cannot use `h.0` because it was mutably borrowed
[01:10:02]    |         ^^^ use of borrowed `h.0`
[01:10:02] LL |         drop(x);
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `e.0` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = e.x();
[01:10:02] LL |         let x = e.x();
[01:10:02]    |                 - borrow of `*e` occurs here
[01:10:02] LL |         match *e {
[01:10:02] LL |             Baz::X(value) => value
[01:10:02]    |                    ^^^^^ use of borrowed `*e`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `u.a` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut u.a;
[01:10:02] LL |         let x = &mut u.a;
[01:10:02]    |                 -------- borrow of `u.a` occurs here
[01:10:02] LL |         u.a; //~ ERROR cannot use `u.a` because it was mutably borrowed
[01:10:02]    |         ^^^ use of borrowed `u.a`
[01:10:02] LL |         drop(x);
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] LL |         match v {
[01:10:02] LL |         match v {
[01:10:02] LL |             &[x, _, .., _, _] => println!("{}", x),
[01:10:02]    |               ^ use of borrowed `v`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             &[_, x, .., _, _] => println!("{}", x),
[01:10:02]    |                  ^ use of borrowed `v`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             &[_, _, .., x, _] => println!("{}", x),
[01:10:02]    |                         ^ use of borrowed `v`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             &[_, _, .., _, x] => println!("{}", x),
[01:10:02]    |                            ^ use of borrowed `v`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] LL |         match v {
[01:10:02] LL |         match v {
[01:10:02] LL |             &[x..] => println!("{:?}", x),
[01:10:02]    |               ^ use of borrowed `v`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             &[_, x..] => println!("{:?}", x),
[01:10:02]    |                  ^ use of borrowed `v`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             &[x.., _] => println!("{:?}", x),
[01:10:02]    |               ^ use of borrowed `v`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             &[_, x.., _] => println!("{:?}", x),
[01:10:02]    |                  ^ use of borrowed `v`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] error[E0503]: cannot use `e` because it was mutably borrowed
[01:10:02] error[E0503]: cannot use `e` because it was mutably borrowed
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-describe-lvalue.rs:171:13
[01:10:02]    |
[01:10:02] LL |         let x = &mut e;
[01:10:02]    |                 ------ borrow of `e` occurs here
[01:10:02] LL |         match e {
[01:10:02] LL |             E::A(ref ax) =>
[01:10:02]    |             ^^^^^^^^^^^^ use of borrowed `e`
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0502]: cannot borrow `e.0` as immutable because it is also borrowed as mutable
[01:10:02]    |
[01:10:02] LL |         let x = &mut e;
[01:10:02]    |                 ------ mutable borrow occurs here
[01:10:02] LL |         match e {
[01:10:02] LL |         match e {
[01:10:02] LL |             E::A(ref ax) =>
[01:10:02] ...
[01:10:02] LL |         drop(x);
[01:10:02]    |              - mutable borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0502]: cannot borrow `e.x` as immutable because it is also borrowed as mutable
[01:10:02]    |
[01:10:02] LL |         let x = &mut e;
[01:10:02]    |                 ------ mutable borrow occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             E::B { x: ref bx } =>
[01:10:02] ...
[01:10:02] LL |         drop(x);
[01:10:02]    |              - mutable borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0502]: cannot borrow `s.y.0` as immutable because it is also borrowed as mutable
[01:10:02]    |
[01:10:02] LL |         let x = &mut s;
[01:10:02]    |                 ------ mutable borrow occurs here
[01:10:02] LL |         match s {
[01:10:02] LL |         match s {
[01:10:02] LL |             S  { y: (ref y0, _), .. } =>
[01:10:02] ...
[01:10:02] LL |         drop(x);
[01:10:02]    |              - mutable borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0502]: cannot borrow `s.x.y` as immutable because it is also borrowed as mutable
[01:10:02]    |
[01:10:02] LL |         let x = &mut s;
[01:10:02]    |                 ------ mutable borrow occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             S  { x: F { y: ref x0, .. }, .. } =>
[01:10:02] ...
[01:10:02] LL |         drop(x);
[01:10:02]    |              - mutable borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0503]: cannot use `*v` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] LL |         v[0].y;
[01:10:02] LL |         v[0].y;
[01:10:02]    |         ^^^^ use of borrowed `v`
[01:10:02] ...
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] error[E0503]: cannot use `v[_].y` because it was mutably borrowed
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ borrow of `v` occurs here
[01:10:02] LL |         v[0].y;
[01:10:02] LL |         v[0].y;
[01:10:02]    |         ^^^^^^ use of borrowed `v`
[01:10:02] ...
[01:10:02] LL |         drop(x);
[01:10:02]    |              - borrow later used here
[01:10:02] 
[01:10:02] error[E0502]: cannot borrow `v[..].x` as immutable because it is also borrowed as mutable
[01:10:02]    |
[01:10:02] LL |         let x = &mut v;
[01:10:02]    |                 ------ mutable borrow occurs here
[01:10:02] LL |         match v {
[01:10:02] LL |         match v {
[01:10:02] LL |             &[_, F {x: ref xf, ..}] => println!("{}", xf),
[01:10:02] ...
[01:10:02] LL |         drop(x);
[01:10:02]    |              - mutable borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:10:02]    |
[01:10:02] LL |             let x = &mut block;
[01:10:02]    |                     ---------- mutable borrow occurs here
[01:10:02]    |                     ---------- mutable borrow occurs here
[01:10:02] LL |             let p: &'a u8 = &*block.current;
[01:10:02] ...
[01:10:02] LL |             drop(x);
[01:10:02]    |                  - mutable borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:10:02]    |
[01:10:02] LL |             let x = &mut block;
[01:10:02]    |                     ---------- mutable borrow occurs here
[01:10:02]    |                     ---------- mutable borrow occurs here
[01:10:02] LL |             let p : *const u8 = &*(*block).current;
[01:10:02] ...
[01:10:02] LL |             drop(x);
[01:10:02]    |                  - mutable borrow later used here
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0382]: use of moved value: `x`
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-describe-lvalue.rs:282:22
[01:10:02]    |
[01:10:02] LL |                 drop(x);
[01:10:02]    |                      - value moved here
[01:10:02] LL |                 drop(x); //~ ERROR use of moved value: `x`
[01:10:02]    |                      ^ value used here after move
[01:10:02]    |
[01:10:02]    = note: move occurs because `x` has type `std::vec::Vec<i32>`, which does not implement the `Copy` trait
[01:10:02] error: aborting due to 32 previous errors
[01:10:02] 
[01:10:02] Some errors have detailed explanations: E0382, E0499, E0502, E0503.
[01:10:02] For more information about an error, try `rustc --explain E0382`.
[01:10:02] For more information about an error, try `rustc --explain E0382`.
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/borrowck/borrowck-migrate-to-nll.rs#edition stdout ----
[01:10:02] 
[01:10:02] error in revision `edition`: test compilation failed although it shouldn't!
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/borrowck/borrowck-migrate-to-nll.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--cfg" "edition" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-migrate-to-nll.edition/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--edition=2018" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-migrate-to-nll.edition/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0507]: cannot move out of borrowed content
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-migrate-to-nll.rs:25:17
[01:10:02]    |
[01:10:02] LL |                 (|| { let bar = foo; bar.take() })();
[01:10:02]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot move out of borrowed content
[01:10:02] error: aborting due to previous error
[01:10:02] 
[01:10:02] For more information about this error, try `rustc --explain E0507`.
[01:10:02] 
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/borrowck/borrowck-migrate-to-nll.rs#zflag stdout ----
[01:10:02] 
[01:10:02] error in revision `zflag`: test compilation failed although it shouldn't!
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/borrowck/borrowck-migrate-to-nll.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--cfg" "zflag" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-migrate-to-nll.zflag/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-Z" "borrowck=migrate" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-migrate-to-nll.zflag/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0507]: cannot move out of borrowed content
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-migrate-to-nll.rs:25:17
[01:10:02]    |
[01:10:02] LL |                 (|| { let bar = foo; bar.take() })();
[01:10:02]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot move out of borrowed content
[01:10:02] error: aborting due to previous error
[01:10:02] 
[01:10:02] For more information about this error, try `rustc --explain E0507`.
[01:10:02] 
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/borrowck/borrowck-mutate-in-guard.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] 18 LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
[01:10:02] 19    |                                         ^^^^^^^^^^^^^^^^^^^ assignment in pattern guard
[01:10:02] 20 
[01:10:02] - warning[E0510]: cannot assign `x` in match guard
[01:10:02] + error[E0510]: cannot assign `x` in match guard
[01:10:02] 23    |
[01:10:02] 24 LL |     match x {
[01:10:02] 
[01:10:02] 
[01:10:02] 25    |           - value is immutable in match guard
[01:10:02] 26 LL |         Enum::A(_) if { x = Enum::B(false); false } => 1,
[01:10:02] -    |
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 31 
[01:10:02] 31 
[01:10:02] - warning[E0510]: cannot mutably borrow `x` in match guard
[01:10:02] + error[E0510]: cannot mutably borrow `x` in match guard
[01:10:02] 34    |
[01:10:02] 35 LL |     match x {
[01:10:02] 
[01:10:02] 37 ...
[01:10:02] 37 ...
[01:10:02] 38 LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
[01:10:02] -    |
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 43 
---
[01:10:02] 47 For more information about an error, try `rustc --explain E0301`.
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-mutate-in-guard/borrowck-mutate-in-guard.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args borrowck/borrowck-mutate-in-guard.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/borrowck/borrowck-mutate-in-guard.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-mutate-in-guard" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-mutate-in-guard/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0302]: cannot assign in a pattern guard
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-mutate-in-guard.rs:10:25
[01:10:02]    |
[01:10:02] LL |         Enum::A(_) if { x = Enum::B(false); false } => 1,
[01:10:02]    |                         ^^^^^^^^^^^^^^^^^^ assignment in pattern guard
[01:10:02] error[E0301]: cannot mutably borrow in a pattern guard
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-mutate-in-guard.rs:15:38
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
[01:10:02]    |                                      ^ borrowed mutably in pattern guard
[01:10:02]    |
[01:10:02]    = help: add #![feature(bind_by_move_pattern_guards)] to the crate attributes to enable
[01:10:02] error[E0302]: cannot assign in a pattern guard
[01:10:02]   --> /checkout/src/test/ui/borrowck/borrowck-mutate-in-guard.rs:15:41
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
[01:10:02]    |                                         ^^^^^^^^^^^^^^^^^^^ assignment in pattern guard
[01:10:02] 
[01:10:02] error[E0510]: cannot assign `x` in match guard
[01:10:02]    |
[01:10:02] LL |     match x {
[01:10:02] LL |     match x {
[01:10:02]    |           - value is immutable in match guard
[01:10:02] LL |         Enum::A(_) if { x = Enum::B(false); false } => 1,
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0510]: cannot mutably borrow `x` in match guard
[01:10:02]    |
[01:10:02] LL |     match x {
[01:10:02] LL |     match x {
[01:10:02]    |           - value is immutable in match guard
[01:10:02] ...
[01:10:02] LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
[01:10:02] 
[01:10:02] error: aborting due to 5 previous errors
[01:10:02] 
[01:10:02] Some errors have detailed explanations: E0301, E0302, E0510.
---
[01:10:02] 
[01:10:02] 13    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02] 14    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 15 
[01:10:02] - warning[E0381]: use of possibly uninitialized variable: `a`
[01:10:02] + error[E0381]: use of possibly uninitialized variable: `a`
[01:10:02] 18    |
[01:10:02] 19 LL |     a + b
[01:10:02] 
[01:10:02] 
[01:10:02] 20    |     ^ use of possibly uninitialized `a`
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 24 
[01:10:02] 24 
[01:10:02] - warning[E0381]: use of possibly uninitialized variable: `b`
[01:10:02] + error[E0381]: use of possibly uninitialized variable: `b`
[01:10:02] 27    |
[01:10:02] 28 LL |     a + b
[01:10:02] 
[01:10:02] 
[01:10:02] 29    |         ^ use of possibly uninitialized `b`
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 33 
[01:10:02] - error: aborting due to 2 previous errors
---
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const_let_refutable/const_let_refutable.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args consts/const_let_refutable.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/const_let_refutable.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const_let_refutable" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const_let_refutable/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0005]: refutable pattern in function argument: `&[]` not covered
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn slice([a, b]: &[i32]) -> i32 { //~ ERROR refutable pattern in function argument
[01:10:02]    |                ^^^^^^ pattern `&[]` not covered
[01:10:02] 
[01:10:02] error[E0723]: can only call other `const fn` within a `const fn`, but `const std::ops::Add::add` is not stable as `const fn`
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |     a + b //~ ERROR can only call other `const fn` within a `const fn`
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0381]: use of possibly uninitialized variable: `a`
[01:10:02]   --> /checkout/src/test/ui/consts/const_let_refutable.rs:4:5
[01:10:02]    |
[01:10:02] LL |     a + b //~ ERROR can only call other `const fn` within a `const fn`
[01:10:02]    |     ^ use of possibly uninitialized `a`
[01:10:02] error[E0381]: use of possibly uninitialized variable: `b`
[01:10:02]   --> /checkout/src/test/ui/consts/const_let_refutable.rs:4:9
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |     a + b //~ ERROR can only call other `const fn` within a `const fn`
[01:10:02]    |         ^ use of possibly uninitialized `b`
[01:10:02] error: aborting due to 4 previous errors
[01:10:02] 
[01:10:02] Some errors have detailed explanations: E0005, E0381, E0723.
[01:10:02] For more information about an error, try `rustc --explain E0005`.
---
[01:10:02] - warning[E0716]: temporary value dropped while borrowed
[01:10:02] + error[E0716]: temporary value dropped while borrowed
[01:10:02] 20   --> $DIR/min_const_fn_dyn.rs:12:67
[01:10:02] 21    |
[01:10:02] 22 LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
[01:10:02] 24    |                                                                  ||
[01:10:02] 25    |                                                                  |creates a temporary which is freed while still in use
[01:10:02] 26    |                                                                  cast requires that borrow lasts for `'static`
[01:10:02] -    |
---
[01:10:02] 34 For more information about an error, try `rustc --explain E0716`.
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn_dyn/min_const_fn_dyn.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args consts/min_const_fn/min_const_fn_dyn.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn_dyn" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn_dyn/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:9:5
[01:10:02]    |
[01:10:02] LL |     x.0.field;
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:12:66
[01:10:02]    |
[01:10:02] LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0716]: temporary value dropped while borrowed
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:12:67
[01:10:02]    |
[01:10:02] LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
[01:10:02]    |                                                                  -^    - temporary value is freed at the end of this statement
[01:10:02]    |                                                                  |creates a temporary which is freed while still in use
[01:10:02]    |                                                                  cast requires that borrow lasts for `'static`
[01:10:02] 
[01:10:02] error: aborting due to 3 previous errors
---
[01:10:02] - warning[E0515]: cannot return reference to temporary value
[01:10:02] + error[E0515]: cannot return reference to temporary value
[01:10:02] 290   --> $DIR/min_const_fn.rs:136:63
[01:10:02] 291    |
[01:10:02] 292 LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
[01:10:02] 294    |                                                               ||
[01:10:02] 295    |                                                               |temporary value created here
[01:10:02] 296    |                                                               returns a reference to data owned by the current function
[01:10:02] -    |
---
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn/min_const_fn.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args consts/min_const_fn/min_const_fn.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0493]: destructors cannot be evaluated at compile-time
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:37:25
[01:10:02]    |
[01:10:02] LL |     const fn into_inner(self) -> T { self.0 } //~ destructors cannot be evaluated
[01:10:02]    |                         ^^^^ constant functions cannot evaluate destructors
[01:10:02] error[E0723]: mutable references in const fn are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:39:36
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |     const fn get_mut(&mut self) -> &mut T { &mut self.0 }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0493]: destructors cannot be evaluated at compile-time
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:44:28
[01:10:02]    |
[01:10:02] LL |     const fn into_inner_lt(self) -> T { self.0 } //~ destructors cannot be evaluated
[01:10:02]    |                            ^^^^ constant functions cannot evaluate destructors
[01:10:02] error[E0723]: mutable references in const fn are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:46:42
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |     const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0493]: destructors cannot be evaluated at compile-time
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:51:27
[01:10:02]    |
[01:10:02] LL |     const fn into_inner_s(self) -> T { self.0 } //~ ERROR destructors
[01:10:02]    |                           ^^^^ constant functions cannot evaluate destructors
[01:10:02] error[E0723]: mutable references in const fn are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:53:38
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |     const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }
[01:10:02]    |
[01:10:02] thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:512:22
[01:10:02] note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] error[E0723]: mutable references in const fn are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:58:39
[01:10:02]    |
[01:10:02] LL |     const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:76:16
[01:10:02]    |
[01:10:02] LL | const fn foo11<T: std::fmt::Display>(t: T) -> T { t }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:78:18
[01:10:02]    |
[01:10:02] LL | const fn foo11_2<T: Send>(t: T) -> T { t }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: only int, `bool` and `char` operations are stable in const fn
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn foo19(f: f32) -> f32 { f * 2.0 }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: only int, `bool` and `char` operations are stable in const fn
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn foo19_2(f: f32) -> f32 { 2.0 - f }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: only int and `bool` operations are stable in const fn
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:84:35
[01:10:02]    |
[01:10:02] LL | const fn foo19_3(f: f32) -> f32 { -f }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: only int, `bool` and `char` operations are stable in const fn
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn foo19_4(f: f32, g: f32) -> f32 { f / g }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: cannot access `static` items in const fn
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:90:27
[01:10:02]    |
[01:10:02] LL | const fn foo25() -> u32 { BAR } //~ ERROR cannot access `static` items in const fn
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: cannot access `static` items in const fn
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:91:36
[01:10:02]    |
[01:10:02] LL | const fn foo26() -> &'static u32 { &BAR } //~ ERROR cannot access `static` items
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: casting pointers to ints is unstable in const fn
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:92:42
[01:10:02]    |
[01:10:02] LL | const fn foo30(x: *const u32) -> usize { x as usize }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: casting pointers to ints is unstable in const fn
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:94:63
[01:10:02]    |
[01:10:02] LL | const fn foo30_with_unsafe(x: *const u32) -> usize { unsafe { x as usize } }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: casting pointers to ints is unstable in const fn
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:96:42
[01:10:02]    |
[01:10:02] LL | const fn foo30_2(x: *mut u32) -> usize { x as usize }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: casting pointers to ints is unstable in const fn
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:98:63
[01:10:02]    |
[01:10:02] LL | const fn foo30_2_with_unsafe(x: *mut u32) -> usize { unsafe { x as usize } }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: `if`, `match`, `&&` and `||` are not stable in const fn
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn foo30_4(b: bool) -> usize { if b { 1 } else { 42 } }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: `if`, `match`, `&&` and `||` are not stable in const fn
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn foo30_5(b: bool) { while b { } } //~ ERROR not stable in const fn
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: `if`, `match`, `&&` and `||` are not stable in const fn
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn foo36(a: bool, b: bool) -> bool { a && b }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: `if`, `match`, `&&` and `||` are not stable in const fn
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn foo37(a: bool, b: bool) -> bool { a || b }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: mutable references in const fn are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:108:14
[01:10:02]    |
[01:10:02] LL | const fn inc(x: &mut i32) { *x += 1 }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:113:6
[01:10:02]    |
[01:10:02] LL | impl<T: std::fmt::Debug> Foo<T> {
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:118:6
[01:10:02]    |
[01:10:02] LL | impl<T: std::fmt::Debug + Sized> Foo<T> {
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:123:6
[01:10:02]    |
[01:10:02] LL | impl<T: Sync + Sized> Foo<T> {
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: `impl Trait` in const fn is unstable
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn no_rpit2() -> AlanTuring<impl std::fmt::Debug> { AlanTuring(0) }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:131:34
[01:10:02]    |
[01:10:02] LL | const fn no_apit2(_x: AlanTuring<impl std::fmt::Debug>) {}
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:133:22
[01:10:02]    |
[01:10:02] LL | const fn no_apit(_x: impl std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized`
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: `impl Trait` in const fn is unstable
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const fn no_rpit() -> impl std::fmt::Debug {} //~ ERROR `impl Trait` in const fn is unstable
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:135:23
[01:10:02]    |
[01:10:02] LL | const fn no_dyn_trait(_x: &dyn std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized`
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:136:32
[01:10:02]    |
[01:10:02] LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0515]: cannot return reference to temporary value
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:136:63
[01:10:02]    |
[01:10:02] LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
[01:10:02]    |                                                               ^--
[01:10:02]    |                                                               |temporary value created here
[01:10:02]    |                                                               returns a reference to data owned by the current function
[01:10:02] 
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:144:41
[01:10:02]    |
[01:10:02] LL | const fn really_no_traits_i_mean_it() { (&() as &std::fmt::Debug, ()).1 }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: function pointers in const fn are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:147:21
[01:10:02]    |
[01:10:02] LL | const fn no_fn_ptrs(_x: fn()) {}
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0723]: function pointers in const fn are unstable
[01:10:02]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:149:27
[01:10:02]    |
[01:10:02] LL | const fn no_fn_ptrs2() -> fn() { fn foo() {} foo }
[01:10:02]    |
[01:10:02]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:10:02]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:10:02] 
---
[01:10:02] 
[01:10:02] ---- [ui] ui/empty/empty-never-array.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] 11 LL |       let Helper::U(u) = Helper::T(t, []);
[01:10:02] 12    |           ^^^^^^^^^^^^ pattern `T(_, _)` not covered
[01:10:02] 13 
[01:10:02] - warning[E0381]: use of possibly uninitialized variable: `u`
[01:10:02] + error[E0381]: use of possibly uninitialized variable: `u`
[01:10:02] 16    |
[01:10:02] 17 LL |     u
[01:10:02] 
[01:10:02] 
[01:10:02] 18    |     ^ use of possibly uninitialized `u`
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 22 
[01:10:02] - error: aborting due to previous error
[01:10:02] - error: aborting due to previous error
[01:10:02] + error: aborting due to 2 previous errors
[01:10:02] 24 
[01:10:02] 25 Some errors have detailed explanations: E0005, E0381.
[01:10:02] 26 For more information about an error, try `rustc --explain E0005`.
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/empty/empty-never-array/empty-never-array.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args empty/empty-never-array.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/empty/empty-never-array.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/empty/empty-never-array" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/empty/empty-never-array/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0005]: refutable pattern in local binding: `T(_, _)` not covered
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | / enum Helper<T, U> {
[01:10:02] LL | |     T(T, [!; 0]),
[01:10:02] LL | |     #[allow(dead_code)]
[01:10:02] LL | |     U(U),
[01:10:02] LL | | }
[01:10:02]    | |_- `Helper<T, U>` defined here
[01:10:02] ...
[01:10:02] LL |       let Helper::U(u) = Helper::T(t, []);
[01:10:02]    |           ^^^^^^^^^^^^ pattern `T(_, _)` not covered
[01:10:02] error[E0381]: use of possibly uninitialized variable: `u`
[01:10:02]   --> /checkout/src/test/ui/empty/empty-never-array.rs:12:5
[01:10:02]    |
[01:10:02] LL |     u
[01:10:02] LL |     u
[01:10:02]    |     ^ use of possibly uninitialized `u`
[01:10:02] error: aborting due to 2 previous errors
[01:10:02] 
[01:10:02] Some errors have detailed explanations: E0005, E0381.
[01:10:02] For more information about an error, try `rustc --explain E0005`.
[01:10:02] For more information about an error, try `rustc --explain E0005`.
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/feature-gates/feature-gate-nll.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] - warning[E0502]: cannot borrow `*x.1` as immutable because it is also borrowed as mutable
[01:10:02] + error[E0502]: cannot borrow `*x.1` as immutable because it is also borrowed as mutable
[01:10:02] 3    |
[01:10:02] 4 LL |     let m = &mut x;
[01:10:02] 
[01:10:02] 8 ...
---
[01:10:02] - 
[01:10:02] - error: compilation successful
[01:10:02] -   --> $DIR/feature-gate-nll.rs:10:1
[01:10:02] -    |
[01:10:02] - LL | / fn main() {
[01:10:02] - LL | |     let mut x = (33, &0);
[01:10:02] - LL | |
[01:10:02] - LL | |     let m = &mut x;
[01:10:02] - ...  |
[01:10:02] - LL | |     m;
[01:10:02] - LL | | }
[01:10:02] 26 
[01:10:02] 27 error: aborting due to previous error
[01:10:02] 28 
[01:10:02] 
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/feature-gates/feature-gate-nll/feature-gate-nll.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args feature-gates/feature-gate-nll.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/feature-gates/feature-gate-nll.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/feature-gates/feature-gate-nll" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/feature-gates/feature-gate-nll/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0502]: cannot borrow `*x.1` as immutable because it is also borrowed as mutable
[01:10:02]    |
[01:10:02] LL |     let m = &mut x;
[01:10:02]    |             ------ mutable borrow occurs here
[01:10:02]    |             ------ mutable borrow occurs here
[01:10:02] LL |     let p = &*x.1;
[01:10:02] ...
[01:10:02] LL |     m;
[01:10:02]    |     - mutable borrow later used here
[01:10:02] 
---
[01:10:02] 
[01:10:02] ---- [ui] ui/issues/issue-15381.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] 4 LL |     for &[x,y,z] in values.chunks(3).filter(|&xs| xs.len() == 3) {
[01:10:02] 5    |         ^^^^^^^^ pattern `&[]` not covered
[01:10:02] - warning[E0381]: borrow of possibly uninitialized variable: `y`
[01:10:02] - warning[E0381]: borrow of possibly uninitialized variable: `y`
[01:10:02] + error[E0381]: borrow of possibly uninitialized variable: `y`
[01:10:02] 9    |
[01:10:02] 9    |
[01:10:02] 10 LL |         println!("y={}", y);
[01:10:02] 
[01:10:02] 11    |                          ^ use of possibly uninitialized `y`
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 15 
[01:10:02] - error: aborting due to previous error
---
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-15381/issue-15381.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args issues/issue-15381.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/issues/issue-15381.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-15381" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-15381/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0005]: refutable pattern in `for` loop binding: `&[]` not covered
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |     for &[x,y,z] in values.chunks(3).filter(|&xs| xs.len() == 3) {
[01:10:02]    |         ^^^^^^^^ pattern `&[]` not covered
[01:10:02] error[E0381]: borrow of possibly uninitialized variable: `y`
[01:10:02]   --> /checkout/src/test/ui/issues/issue-15381.rs:6:26
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |         println!("y={}", y);
[01:10:02]    |                          ^ use of possibly uninitialized `y`
[01:10:02] error: aborting due to 2 previous errors
[01:10:02] 
[01:10:02] Some errors have detailed explanations: E0005, E0381.
[01:10:02] For more information about an error, try `rustc --explain E0005`.
[01:10:02] For more information about an error, try `rustc --explain E0005`.
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/issues/issue-40510-1.rs stdout ----
[01:10:02] 
[01:10:02] error: test compilation failed although it shouldn't!
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/issues/issue-40510-1.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-40510-1" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-40510-1/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error: captured variable cannot escape `FnMut` closure body
[01:10:02]    |
[01:10:02] LL |     || {
[01:10:02] LL |     || {
[01:10:02]    |      - inferred to be a `FnMut` closure
[01:10:02] LL |         &mut x
[01:10:02]    |         ^^^^^^ returns a reference to a captured variable which escapes the closure body
[01:10:02]    |
[01:10:02]    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:10:02]    = note: ...therefore, they cannot allow references to captured variables to escape
[01:10:02] error: aborting due to previous error
[01:10:02] 
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/issues/issue-40510-3.rs stdout ----
[01:10:02] 
[01:10:02] error: test compilation failed although it shouldn't!
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/issues/issue-40510-3.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-40510-3" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-40510-3/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error: captured variable cannot escape `FnMut` closure body
[01:10:02]    |
[01:10:02] LL |       || {
[01:10:02] LL |       || {
[01:10:02]    |        - inferred to be a `FnMut` closure
[01:10:02] LL | |             x.push(())
[01:10:02] LL | |         }
[01:10:02]    | |_________^ returns a closure that contains a reference to a captured variable, which then escapes the closure body
[01:10:02]    |
[01:10:02]    |
[01:10:02]    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:10:02]    = note: ...therefore, they cannot allow references to captured variables to escape
[01:10:02] error: aborting due to previous error
[01:10:02] 
[01:10:02] 
[01:10:02] ------------------------------------------
---
[01:10:02] - warning[E0713]: borrow may still be in use when destructor runs
[01:10:02] + error[E0713]: borrow may still be in use when destructor runs
[01:10:02] 2   --> $DIR/issue-45696-scribble-on-boxed-borrow.rs:51:5
[01:10:02] 3    |
[01:10:02] 4 LL | fn scribbled<'a>(s: Scribble<'a>) -> &'a mut u32 {
[01:10:02] 8 ...
[01:10:02] 9 LL | }
[01:10:02] 9 LL | }
[01:10:02] 10    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 14 
[01:10:02] - warning[E0713]: borrow may still be in use when destructor runs
[01:10:02] - warning[E0713]: borrow may still be in use when destructor runs
[01:10:02] + error[E0713]: borrow may still be in use when destructor runs
[01:10:02] 16   --> $DIR/issue-45696-scribble-on-boxed-borrow.rs:62:5
[01:10:02] 17    |
[01:10:02] 18 LL | fn boxed_scribbled<'a>(s: Box<Scribble<'a>>) -> &'a mut u32 {
[01:10:02] 22 ...
[01:10:02] 23 LL | }
[01:10:02] 23 LL | }
[01:10:02] 24    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 28 
[01:10:02] - warning[E0713]: borrow may still be in use when destructor runs
[01:10:02] - warning[E0713]: borrow may still be in use when destructor runs
[01:10:02] + error[E0713]: borrow may still be in use when destructor runs
[01:10:02] 30   --> $DIR/issue-45696-scribble-on-boxed-borrow.rs:73:5
[01:10:02] 31    |
[01:10:02] 32 LL | fn boxed_boxed_scribbled<'a>(s: Box<Box<Scribble<'a>>>) -> &'a mut u32 {
[01:10:02] 36 ...
[01:10:02] 37 LL | }
[01:10:02] 37 LL | }
[01:10:02] 38    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 42 
[01:10:02] - error: compilation successful
[01:10:02] - error: compilation successful
[01:10:02] -   --> $DIR/issue-45696-scribble-on-boxed-borrow.rs:80:1
[01:10:02] -    |
[01:10:02] - LL | / fn main() {
[01:10:02] - LL | |     let mut x = 1;
[01:10:02] - LL | |     {
[01:10:02] - LL | |         let mut long_lived = Scribble(&mut x);
[01:10:02] - ...  |
[01:10:02] - LL | |     *boxed_boxed_scribbled(Box::new(Box::new(Scribble(&mut x)))) += 10;
[01:10:02] - LL | | }
[01:10:02] - 
[01:10:02] - error: aborting due to previous error
[01:10:02] + error: aborting due to 3 previous errors
[01:10:02] 56 
[01:10:02] 56 
[01:10:02] 57 For more information about this error, try `rustc --explain E0713`.
[01:10:02] 58 
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-45696-scribble-on-boxed-borrow.migrate/issue-45696-scribble-on-boxed-borrow.migrate.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args issues/issue-45696-scribble-on-boxed-borrow.rs`
[01:10:02] 
[01:10:02] error in revision `migrate`: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--cfg" "migrate" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-45696-scribble-on-boxed-borrow.migrate" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-45696-scribble-on-boxed-borrow.migrate/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0713]: borrow may still be in use when destructor runs
[01:10:02]   --> /checkout/src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.rs:51:5
[01:10:02]    |
[01:10:02] LL | fn scribbled<'a>(s: Scribble<'a>) -> &'a mut u32 {
[01:10:02]    |              -- lifetime `'a` defined here
[01:10:02] LL |     &mut *s.0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
[01:10:02]    |     ^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
[01:10:02] LL | }
[01:10:02] LL | }
[01:10:02]    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:10:02] error[E0713]: borrow may still be in use when destructor runs
[01:10:02]   --> /checkout/src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.rs:62:5
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | fn boxed_scribbled<'a>(s: Box<Scribble<'a>>) -> &'a mut u32 {
[01:10:02]    |                    -- lifetime `'a` defined here
[01:10:02] LL |     &mut *(*s).0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
[01:10:02]    |     ^^^^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
[01:10:02] LL | }
[01:10:02] LL | }
[01:10:02]    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:10:02] error[E0713]: borrow may still be in use when destructor runs
[01:10:02]   --> /checkout/src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.rs:73:5
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | fn boxed_boxed_scribbled<'a>(s: Box<Box<Scribble<'a>>>) -> &'a mut u32 {
[01:10:02]    |                          -- lifetime `'a` defined here
[01:10:02] LL |     &mut *(**s).0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
[01:10:02]    |     ^^^^^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
[01:10:02] LL | }
[01:10:02] LL | }
[01:10:02]    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:10:02] error: aborting due to 3 previous errors
[01:10:02] 
[01:10:02] For more information about this error, try `rustc --explain E0713`.
[01:10:02] 
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/issues/issue-49824.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] - warning: captured variable cannot escape `FnMut` closure body
[01:10:02] + error: captured variable cannot escape `FnMut` closure body
[01:10:02] 3    |
[01:10:02] 4 LL |       || {
[01:10:02] 
[01:10:02] 13    |
[01:10:02] 13    |
[01:10:02] 14    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:10:02] 15    = note: ...therefore, they cannot allow references to captured variables to escape
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] - 
[01:10:02] - error: compilation successful
[01:10:02] -   --> $DIR/issue-49824.rs:6:1
---
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-49824/issue-49824.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args issues/issue-49824.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/issues/issue-49824.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-49824" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-49824/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error: captured variable cannot escape `FnMut` closure body
[01:10:02]    |
[01:10:02] LL |       || {
[01:10:02] LL |       || {
[01:10:02]    |        - inferred to be a `FnMut` closure
[01:10:02] LL | /         || {
[01:10:02] LL | |         //~^ WARNING captured variable cannot escape `FnMut` closure body
[01:10:02] LL | |         //~| WARNING this error has been downgraded to a warning
[01:10:02] LL | |         //~| WARNING this warning will become a hard error in the future
[01:10:02] LL | |             let _y = &mut x;
[01:10:02]    | |_________^ returns a closure that contains a reference to a captured variable, which then escapes the closure body
[01:10:02]    |
[01:10:02]    |
[01:10:02]    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:10:02]    = note: ...therefore, they cannot allow references to captured variables to escape
[01:10:02] error: aborting due to previous error
[01:10:02] 
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/pattern/pattern-bindings-after-at.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] 4 LL |         ref mut z @ &mut Some(ref a) => {
[01:10:02] 5    |                               ^^^^^ not allowed after `@`
[01:10:02] 6 
[01:10:02] - warning[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
[01:10:02] + error[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
[01:10:02] 9    |
[01:10:02] 9    |
[01:10:02] 10 LL |         ref mut z @ &mut Some(ref a) => {
[01:10:02] 15 ...
[01:10:02] 15 ...
[01:10:02] 16 LL |             **z = None;
[01:10:02] 17    |             ---------- mutable borrow later used here
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 21 
[01:10:02] - error: aborting due to previous error
[01:10:02] - error: aborting due to previous error
[01:10:02] + error: aborting due to 2 previous errors
[01:10:02] 23 
[01:10:02] 24 Some errors have detailed explanations: E0303, E0502.
[01:10:02] 25 For more information about an error, try `rustc --explain E0303`.
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/pattern/pattern-bindings-after-at/pattern-bindings-after-at.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args pattern/pattern-bindings-after-at.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/pattern/pattern-bindings-after-at.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/pattern/pattern-bindings-after-at" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/pattern/pattern-bindings-after-at/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0303]: pattern bindings are not allowed after an `@`
[01:10:02]   --> /checkout/src/test/ui/pattern/pattern-bindings-after-at.rs:8:31
[01:10:02]    |
[01:10:02] LL |         ref mut z @ &mut Some(ref a) => {
[01:10:02]    |                               ^^^^^ not allowed after `@`
[01:10:02] error[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
[01:10:02]   --> /checkout/src/test/ui/pattern/pattern-bindings-after-at.rs:8:31
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |         ref mut z @ &mut Some(ref a) => {
[01:10:02]    |         |                     |
[01:10:02]    |         |                     immutable borrow occurs here
[01:10:02]    |         mutable borrow occurs here
[01:10:02] ...
[01:10:02] ...
[01:10:02] LL |             **z = None;
[01:10:02]    |             ---------- mutable borrow later used here
[01:10:02] error: aborting due to 2 previous errors
[01:10:02] 
[01:10:02] Some errors have detailed explanations: E0303, E0502.
[01:10:02] For more information about an error, try `rustc --explain E0303`.
[01:10:02] For more information about an error, try `rustc --explain E0303`.
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/recursion/recursive-types-are-not-uninhabited.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] 4 LL |     let Ok(x) = res;
[01:10:02] 6 
[01:10:02] 6 
[01:10:02] - warning[E0381]: use of possibly uninitialized variable: `x`
[01:10:02] + error[E0381]: use of possibly uninitialized variable: `x`
[01:10:02] 9    |
[01:10:02] 10 LL |     x
[01:10:02] 
[01:10:02] 
[01:10:02] 11    |     ^ use of possibly uninitialized `x`
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 15 
[01:10:02] - error: aborting due to previous error
---
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/recursion/recursive-types-are-not-uninhabited/recursive-types-are-not-uninhabited.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args recursion/recursive-types-are-not-uninhabited.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/recursion/recursive-types-are-not-uninhabited.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/recursion/recursive-types-are-not-uninhabited" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/recursion/recursive-types-are-not-uninhabited/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0005]: refutable pattern in local binding: `Err(_)` not covered
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL |     let Ok(x) = res;
[01:10:02] 
[01:10:02] 
[01:10:02] error[E0381]: use of possibly uninitialized variable: `x`
[01:10:02]    |
[01:10:02] LL |     x
[01:10:02] LL |     x
[01:10:02]    |     ^ use of possibly uninitialized `x`
[01:10:02] error: aborting due to 2 previous errors
[01:10:02] 
[01:10:02] Some errors have detailed explanations: E0005, E0381.
[01:10:02] For more information about an error, try `rustc --explain E0005`.
[01:10:02] For more information about an error, try `rustc --explain E0005`.
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] 
[01:10:02] ---- [ui] ui/thread-local-in-ctfe.rs stdout ----
[01:10:02] diff of stderr:
[01:10:02] 
[01:10:02] 10 LL | static C: &u32 = &A;
[01:10:02] 12 
[01:10:02] - warning[E0712]: thread-local variable borrowed past end of function
[01:10:02] + error[E0712]: thread-local variable borrowed past end of function
[01:10:02] 14   --> $DIR/thread-local-in-ctfe.rs:9:18
[01:10:02] 14   --> $DIR/thread-local-in-ctfe.rs:9:18
[01:10:02] 15    |
[01:10:02] 16 LL | static C: &u32 = &A;
[01:10:02] 
[01:10:02] 17    |                  ^^- end of enclosing function is here
[01:10:02] 19    |                  thread-local variables cannot be borrowed beyond the end of the function
[01:10:02] -    |
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:10:02] 23 
[01:10:02] 24 error[E0625]: thread-local statics cannot be accessed at compile-time
[01:10:02] 25   --> $DIR/thread-local-in-ctfe.rs:15:16
[01:10:02] 
[01:10:02] 33 LL | const E: &u32 = &A;
[01:10:02] 35 
[01:10:02] - warning[E0712]: thread-local variable borrowed past end of function
[01:10:02] + error[E0712]: thread-local variable borrowed past end of function
[01:10:02] 37   --> $DIR/thread-local-in-ctfe.rs:18:17
[01:10:02] 37   --> $DIR/thread-local-in-ctfe.rs:18:17
[01:10:02] 38    |
[01:10:02] 39 LL | const E: &u32 = &A;
[01:10:02] 
[01:10:02] 40    |                 ^^- end of enclosing function is here
[01:10:02] 42    |                 thread-local variables cannot be borrowed beyond the end of the function
[01:10:02] -    |
[01:10:02] -    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:10:02] -    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
---
[01:10:02] 56 
[01:10:02] 
[01:10:02] 
[01:10:02] The actual stderr differed from the expected stderr.
[01:10:02] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/thread-local-in-ctfe/thread-local-in-ctfe.stderr
[01:10:02] To update references, rerun the tests and pass the `--bless` flag
[01:10:02] To only update this specific test, also pass `--test-args thread-local-in-ctfe.rs`
[01:10:02] error: 1 errors occurred comparing output.
[01:10:02] status: exit code: 1
[01:10:02] status: exit code: 1
[01:10:02] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/thread-local-in-ctfe.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/thread-local-in-ctfe" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/thread-local-in-ctfe/auxiliary" "-A" "unused"
[01:10:02] ------------------------------------------
[01:10:02] 
[01:10:02] ------------------------------------------
[01:10:02] stderr:
[01:10:02] stderr:
[01:10:02] ------------------------------------------
[01:10:02] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:10:02]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:6:17
[01:10:02]    |
[01:10:02] LL | static B: u32 = A;
[01:10:02] 
[01:10:02] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:10:02]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:9:18
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | static C: &u32 = &A;
[01:10:02] 
[01:10:02] error[E0712]: thread-local variable borrowed past end of function
[01:10:02]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:9:18
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | static C: &u32 = &A;
[01:10:02]    |                  ^^- end of enclosing function is here
[01:10:02]    |                  thread-local variables cannot be borrowed beyond the end of the function
[01:10:02] 
[01:10:02] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:10:02]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:15:16
[01:10:02]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:15:16
[01:10:02]    |
[01:10:02] LL | const D: u32 = A;
[01:10:02] 
[01:10:02] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:10:02]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:18:17
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const E: &u32 = &A;
[01:10:02]    |                 ^^
[01:10:02] make: *** [check] Error 1
[01:10:02] error[E0712]: thread-local variable borrowed past end of function
[01:10:02]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:18:17
[01:10:02]    |
[01:10:02]    |
[01:10:02] LL | const E: &u32 = &A;
[01:10:02]    |                 ^^- end of enclosing function is here
[01:10:02]    |                 thread-local variables cannot be borrowed beyond the end of the function
[01:10:02] 
[01:10:02] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:10:02]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:25:5
---
[01:10:02] test result: FAILED. 5494 passed; 18 failed; 21 ignored; 0 measured; 0 filtered out
[01:10:02] 
[01:10:02] 
[01:10:02] 
[01:10:02] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "ui" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-6.0/bin/FileCheck" "--host-rustcflags" "-Crpath -O -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "6.0.0\n" "--system-llvm" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--llvm-cxxflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
[01:10:02] 
[01:10:02] 
[01:10:02] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test
[01:10:02] Build completed unsuccessfully in 0:04:21
---
travis_time:end:03d0e1d6:start=1558100133650296009,finish=1558100133654614224,duration=4318215
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:021b20cc
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:1b7db430
travis_time:start:1b7db430
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:2da034cb
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

@matthewjasper
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@bors try

@bors
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bors commented May 17, 2019

⌛ Trying commit f2d2a4a with merge f45cc3094ee337acd688771b9234318046b0572d...

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bors commented May 17, 2019

☀️ Try build successful - checks-travis
Build commit: f45cc3094ee337acd688771b9234318046b0572d

@matthewjasper
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@craterbot run start=master#39401465da4ce27aeeb2c2a26133ac35c63aa515 end=try#f45cc3094ee337acd688771b9234318046b0572d mode=check-only

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👌 Experiment pr-60914 created and queued.
🔍 You can check out the queue and this experiment's details.

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

@craterbot craterbot added the S-waiting-on-crater Status: Waiting on a crater run to be completed. label May 17, 2019
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🚧 Experiment pr-60914 is now running on agent aws-3-tmp.

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

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🎉 Experiment pr-60914 is completed!
📊 1877 regressed and 0 fixed (60951 total)
📰 Open the full report.

⚠️ If you notice any spurious failure please add them to the blacklist!
ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

@craterbot craterbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-crater Status: Waiting on a crater run to be completed. labels May 19, 2019
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lqd commented May 19, 2019

Not unexpected results: these 87 crates caused 1859 crates to fail downstream, while these 54 crates failed to build themselves.

There is some overlap between these 2 categories: so this PR impacted around 130 root crates. I remember a lot of those from the previous crater runs, with legit errors — some of them fixed in more recent versions of the crates (including semver-compatible releases only requiring a cargo update to fix the NLL errors) .

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lqd commented May 23, 2019

The lang team should have the data they need for this run, so closing the PR.

@lqd lqd closed this May 23, 2019
This was referenced Jun 27, 2019
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for my own future reference: today I attempted the exercise of actually categorizing each of the bugs that @lqd identified above.

I've been logging the results of that investigation at this very sketchy spreadsheet:

https://docs.google.com/spreadsheets/d/1is65VZSGNNhQSNXiyWVWR0OwkTbnwp-r3LH4195MZms/edit?usp=sharing

@Centril Centril reopened this Jul 26, 2019
@Centril Centril closed this Jul 26, 2019
@Centril Centril mentioned this pull request Aug 14, 2019
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bors added a commit that referenced this pull request Aug 14, 2019
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Auto merge of #63565 - Centril:deny-nll-migrate-mode, r=<try>
75eff02 
[DO NOT MERGE] NLL crater run 3: deny NLL warnings in migrate mode

Forward port of #60914.

r? @ghost

cc @rust-lang/lang
cc @rust-lang/wg-compiler-nll
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@lqd @rust-highfive @matthewjasper @bors @craterbot @pnkfelix @Centril