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Add FAQ for NLL migration #60809

Merged
merged 1 commit into from
May 23, 2019
Merged

Add FAQ for NLL migration #60809

merged 1 commit into from
May 23, 2019

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jethrogb
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r? @pnkfelix

cc @oli-obk @davidtwco @Centril Since you've provided feedback on the warning wording before.

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label May 14, 2019
Centril
Centril suggested changes May 14, 2019
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src/librustc_mir/error_codes.rs Outdated Show resolved Hide resolved
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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:0f4baccb:start=1557792985941449991,finish=1557792988027273576,duration=2085823585
$ 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
---

[00:04:23] travis_fold:start:tidy
travis_time:start:tidy
tidy check
[00:04:24] tidy error: duplicate error code: 724
[00:04:24] tidy error: /checkout/src/librustc_mir/error_codes.rs:2427: E0724: r##"
[00:04:24] tidy error: /checkout/src/librustc_typeck/error_codes.rs:4736:     E0724, // `#[ffi_returns_twice]` is only allowed in foreign functions
[00:04:28] some tidy checks failed
[00:04:28] 
[00:04:28] 
[00:04:28] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/tidy" "/checkout/src" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "--no-vendor" "--quiet"
[00:04:28] 
[00:04:28] 
[00:04:28] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:04:28] Build completed unsuccessfully in 0:01:11
[00:04:28] Build completed unsuccessfully in 0:01:11
[00:04:28] make: *** [tidy] Error 1
[00:04:28] Makefile:67: recipe for target 'tidy' failed
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:121b8388
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Tue May 14 00:21:08 UTC 2019
---
travis_time:end:03a5252a:start=1557793269352101740,finish=1557793269356789202,duration=4687462
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:0b27c0a6
$ 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:10d81a04
travis_time:start:10d81a04
$ 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:0d9f5a6e
$ 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)

@jethrogb jethrogb force-pushed the jb/nll-faq branch 2 times, most recently from ef239b2 to 87c7b4c Compare May 14, 2019 16:35
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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:202338c0:start=1557851839644862694,finish=1557851840445254568,duration=800391874
$ 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
---
[01:09:05] 
[01:09:05] running 5530 tests
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---
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---
[01:12:27] 17   --> $DIR/borrowck-anon-fields-variant.rs:37:7
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-anon-fields-variant/borrowck-anon-fields-variant.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args borrowck/borrowck-anon-fields-variant.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] warning[E0503]: cannot use `y` because it was mutably borrowed
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-anon-fields-variant.rs:17:7
[01:12:27]    |
[01:12:27] LL |       Foo::Y(ref mut a, _) => a,
[01:12:27]    |              --------- borrow of `y.0` occurs here
[01:12:27] ...
[01:12:27] LL |       Foo::Y(_, ref mut b) => b,
[01:12:27]    |       ^^^^^^^^^^^^^^^^^^^^ use of borrowed `y.0`
[01:12:27] ...
[01:12:27] LL |     *a += 1;
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] error[E0503]: cannot use `y` because it was mutably borrowed
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-anon-fields-variant.rs:37:7
[01:12:27]    |
[01:12:27] LL |       Foo::Y(ref mut a, _) => a,
[01:12:27]    |              --------- borrow of `y.0` occurs here
[01:12:27] ...
[01:12:27] LL |       Foo::Y(ref mut b, _) => b, //~ ERROR cannot use `y`
[01:12:27]    |       ^^^^^^^^^^^^^^^^^^^^ use of borrowed `y.0`
[01:12:27] ...
[01:12:27] LL |     *a += 1;
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0499]: cannot borrow `y.0` as mutable more than once at a time
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |       Foo::Y(ref mut a, _) => a,
[01:12:27]    |              --------- first mutable borrow occurs here
[01:12:27] ...
[01:12:27] LL |       Foo::Y(ref mut b, _) => b, //~ ERROR cannot use `y`
[01:12:27]    |              ^^^^^^^^^ second mutable borrow occurs here
[01:12:27] ...
[01:12:27] LL |     *a += 1;
[01:12:27]    |     ------- first borrow later used here
[01:12:27] error: aborting due to 2 previous errors
[01:12:27] 
[01:12:27] Some errors have detailed explanations: E0499, E0503.
[01:12:27] For more information about an error, try `rustc --explain E0499`.
---
[01:12:27] 342    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27] 343    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] +    = note: for more information, try `rustc --explain E0729`
[01:12:27] 344 
[01:12:27] 345 warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:12:27] 
[01:12:27] 355    |
[01:12:27] 356    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27] 357    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] 357    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] +    = note: for more information, try `rustc --explain E0729`
[01:12:27] 358 
[01:12:27] 359 error[E0382]: use of moved value: `x`
[01:12:27] 360   --> $DIR/borrowck-describe-lvalue.rs:282:22
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-describe-lvalue/borrowck-describe-lvalue.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args borrowck/borrowck-describe-lvalue.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0499]: cannot borrow `x` as mutable more than once at a time
[01:12:27]    |
[01:12:27] LL |             let y = &mut x;
[01:12:27]    |                     ------ first mutable borrow occurs here
[01:12:27]    |                     ------ first mutable borrow occurs here
[01:12:27] LL |             &mut x; //~ ERROR cannot borrow `x` as mutable more than once at a time
[01:12:27]    |             ^^^^^^ second mutable borrow occurs here
[01:12:27] LL |             *y = 1;
[01:12:27]    |             ------ first borrow later used here
[01:12:27] 
[01:12:27] error[E0499]: cannot borrow `x` as mutable more than once at a time
[01:12:27]    |
[01:12:27] LL |                    let y = &mut x;
[01:12:27]    |                            ------ first mutable borrow occurs here
[01:12:27]    |                            ------ first mutable borrow occurs here
[01:12:27] LL |                    &mut x; //~ ERROR cannot borrow `x` as mutable more than once at a time
[01:12:27]    |                    ^^^^^^ second mutable borrow occurs here
[01:12:27] LL |                    *y = 1;
[01:12:27]    |                    ------ first borrow later used here
[01:12:27] 
[01:12:27] error: captured variable cannot escape `FnMut` closure body
[01:12:27]    |
[01:12:27] LL |              || {
[01:12:27] LL |              || {
[01:12:27]    |               - inferred to be a `FnMut` closure
[01:12:27] LL | /                || { //~ ERROR captured variable cannot escape `FnMut` closure body
[01:12:27] LL | |                    let y = &mut x;
[01:12:27] LL | |                    &mut x; //~ ERROR cannot borrow `x` as mutable more than once at a time
[01:12:27] LL | |                    *y = 1;
[01:12:27] LL | |                    drop(y);
[01:12:27]    | |_________________^ returns a closure that contains a reference to a captured variable, which then escapes the closure body
[01:12:27]    |
[01:12:27]    |
[01:12:27]    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:12:27]    = note: ...therefore, they cannot allow references to captured variables to escape
[01:12:27] 
[01:12:27] error[E0503]: cannot use `f.x` because it was mutably borrowed
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |         let x = f.x();
[01:12:27]    |                 - borrow of `f` occurs here
[01:12:27] LL |         f.x; //~ ERROR cannot use `f.x` because it was mutably borrowed
[01:12:27]    |         ^^^ use of borrowed `f`
[01:12:27] LL |         drop(x);
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `g.0` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = g.x();
[01:12:27] LL |         let x = g.x();
[01:12:27]    |                 - borrow of `g` occurs here
[01:12:27] LL |         g.0; //~ ERROR cannot use `g.0` because it was mutably borrowed
[01:12:27]    |         ^^^ use of borrowed `g`
[01:12:27] LL |         drop(x);
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `h.0` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut h.0;
[01:12:27] LL |         let x = &mut h.0;
[01:12:27]    |                 -------- borrow of `h.0` occurs here
[01:12:27] LL |         h.0; //~ ERROR cannot use `h.0` because it was mutably borrowed
[01:12:27]    |         ^^^ use of borrowed `h.0`
[01:12:27] LL |         drop(x);
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `e.0` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = e.x();
[01:12:27]    |                 - borrow of `e` occurs here
[01:12:27] LL |         match e {
[01:12:27] LL |         match e {
[01:12:27] LL |             Baz::X(value) => value //~ ERROR cannot use `e.0` because it was mutably borrowed
[01:12:27]    |                    ^^^^^ use of borrowed `e`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `u.a` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut u.a;
[01:12:27] LL |         let x = &mut u.a;
[01:12:27]    |                 -------- borrow of `u.a` occurs here
[01:12:27] LL |         u.a; //~ ERROR cannot use `u.a` because it was mutably borrowed
[01:12:27]    |         ^^^ use of borrowed `u.a`
[01:12:27] LL |         drop(x);
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `f.x` because it was mutably borrowed
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |         let x = f.x();
[01:12:27]    |                 - borrow of `*f` occurs here
[01:12:27] LL |         f.x; //~ ERROR cannot use `f.x` because it was mutably borrowed
[01:12:27]    |         ^^^ use of borrowed `*f`
[01:12:27] LL |         drop(x);
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `g.0` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = g.x();
[01:12:27] LL |         let x = g.x();
[01:12:27]    |                 - borrow of `*g` occurs here
[01:12:27] LL |         g.0; //~ ERROR cannot use `g.0` because it was mutably borrowed
[01:12:27]    |         ^^^ use of borrowed `*g`
[01:12:27] LL |         drop(x);
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `h.0` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut h.0;
[01:12:27] LL |         let x = &mut h.0;
[01:12:27]    |                 -------- borrow of `h.0` occurs here
[01:12:27] LL |         h.0; //~ ERROR cannot use `h.0` because it was mutably borrowed
[01:12:27]    |         ^^^ use of borrowed `h.0`
[01:12:27] LL |         drop(x);
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `e.0` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = e.x();
[01:12:27] LL |         let x = e.x();
[01:12:27]    |                 - borrow of `*e` occurs here
[01:12:27] LL |         match *e {
[01:12:27] LL |             Baz::X(value) => value
[01:12:27]    |                    ^^^^^ use of borrowed `*e`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `u.a` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut u.a;
[01:12:27] LL |         let x = &mut u.a;
[01:12:27]    |                 -------- borrow of `u.a` occurs here
[01:12:27] LL |         u.a; //~ ERROR cannot use `u.a` because it was mutably borrowed
[01:12:27]    |         ^^^ use of borrowed `u.a`
[01:12:27] LL |         drop(x);
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] LL |         match v {
[01:12:27] LL |         match v {
[01:12:27] LL |             &[x, _, .., _, _] => println!("{}", x),
[01:12:27]    |               ^ use of borrowed `v`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             &[_, x, .., _, _] => println!("{}", x),
[01:12:27]    |                  ^ use of borrowed `v`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             &[_, _, .., x, _] => println!("{}", x),
[01:12:27]    |                         ^ use of borrowed `v`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             &[_, _, .., _, x] => println!("{}", x),
[01:12:27]    |                            ^ use of borrowed `v`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] LL |         match v {
[01:12:27] LL |         match v {
[01:12:27] LL |             &[x..] => println!("{:?}", x),
[01:12:27]    |               ^ use of borrowed `v`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             &[_, x..] => println!("{:?}", x),
[01:12:27]    |                  ^ use of borrowed `v`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             &[x.., _] => println!("{:?}", x),
[01:12:27]    |               ^ use of borrowed `v`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[..]` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             &[_, x.., _] => println!("{:?}", x),
[01:12:27]    |                  ^ use of borrowed `v`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] error[E0503]: cannot use `e` because it was mutably borrowed
[01:12:27] error[E0503]: cannot use `e` because it was mutably borrowed
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-describe-lvalue.rs:171:13
[01:12:27]    |
[01:12:27] LL |         let x = &mut e;
[01:12:27]    |                 ------ borrow of `e` occurs here
[01:12:27] LL |         match e {
[01:12:27] LL |             E::A(ref ax) =>
[01:12:27]    |             ^^^^^^^^^^^^ use of borrowed `e`
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0502]: cannot borrow `e.0` as immutable because it is also borrowed as mutable
[01:12:27]    |
[01:12:27] LL |         let x = &mut e;
[01:12:27]    |                 ------ mutable borrow occurs here
[01:12:27] LL |         match e {
[01:12:27] LL |         match e {
[01:12:27] LL |             E::A(ref ax) =>
[01:12:27] ...
[01:12:27] LL |         drop(x);
[01:12:27]    |              - mutable borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0502]: cannot borrow `e.x` as immutable because it is also borrowed as mutable
[01:12:27]    |
[01:12:27] LL |         let x = &mut e;
[01:12:27]    |                 ------ mutable borrow occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             E::B { x: ref bx } =>
[01:12:27] ...
[01:12:27] LL |         drop(x);
[01:12:27]    |              - mutable borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0502]: cannot borrow `s.y.0` as immutable because it is also borrowed as mutable
[01:12:27]    |
[01:12:27] LL |         let x = &mut s;
[01:12:27]    |                 ------ mutable borrow occurs here
[01:12:27] LL |         match s {
[01:12:27] LL |         match s {
[01:12:27] LL |             S  { y: (ref y0, _), .. } =>
[01:12:27] ...
[01:12:27] LL |         drop(x);
[01:12:27]    |              - mutable borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0502]: cannot borrow `s.x.y` as immutable because it is also borrowed as mutable
[01:12:27]    |
[01:12:27] LL |         let x = &mut s;
[01:12:27]    |                 ------ mutable borrow occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             S  { x: F { y: ref x0, .. }, .. } =>
[01:12:27] ...
[01:12:27] LL |         drop(x);
[01:12:27]    |              - mutable borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0503]: cannot use `*v` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] LL |         v[0].y;
[01:12:27] LL |         v[0].y;
[01:12:27]    |         ^^^^ use of borrowed `v`
[01:12:27] ...
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] error[E0503]: cannot use `v[_].y` because it was mutably borrowed
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ borrow of `v` occurs here
[01:12:27] LL |         v[0].y;
[01:12:27] LL |         v[0].y;
[01:12:27]    |         ^^^^^^ use of borrowed `v`
[01:12:27] ...
[01:12:27] LL |         drop(x);
[01:12:27]    |              - borrow later used here
[01:12:27] 
[01:12:27] error[E0502]: cannot borrow `v[..].x` as immutable because it is also borrowed as mutable
[01:12:27]    |
[01:12:27] LL |         let x = &mut v;
[01:12:27]    |                 ------ mutable borrow occurs here
[01:12:27] LL |         match v {
[01:12:27] LL |         match v {
[01:12:27] LL |             &[_, F {x: ref xf, ..}] => println!("{}", xf),
[01:12:27] ...
[01:12:27] LL |         drop(x);
[01:12:27]    |              - mutable borrow later used here
[01:12:27] 
[01:12:27] 
[01:12:27] warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:12:27]    |
[01:12:27] LL |             let x = &mut block;
[01:12:27]    |                     ---------- mutable borrow occurs here
[01:12:27]    |                     ---------- mutable borrow occurs here
[01:12:27] LL |             let p: &'a u8 = &*block.current;
[01:12:27] ...
[01:12:27] LL |             drop(x);
[01:12:27]    |                  - mutable borrow later used here
[01:12:27]    |
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
[01:12:27]    |
[01:12:27] LL |             let x = &mut block;
[01:12:27]    |                     ---------- mutable borrow occurs here
[01:12:27]    |                     ---------- mutable borrow occurs here
[01:12:27] LL |             let p : *const u8 = &*(*block).current;
[01:12:27] ...
[01:12:27] LL |             drop(x);
[01:12:27]    |                  - mutable borrow later used here
[01:12:27]    |
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] error[E0382]: use of moved value: `x`
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-describe-lvalue.rs:282:22
[01:12:27]    |
[01:12:27] LL |                 drop(x);
[01:12:27]    |                      - value moved here
[01:12:27] LL |                 drop(x); //~ ERROR use of moved value: `x`
[01:12:27]    |                      ^ value used here after move
[01:12:27]    |
[01:12:27]    = note: move occurs because `x` has type `std::vec::Vec<i32>`, which does not implement the `Copy` trait
[01:12:27] error: aborting due to 30 previous errors
[01:12:27] 
[01:12:27] Some errors have detailed explanations: E0382, E0499, E0502, E0503.
[01:12:27] For more information about an error, try `rustc --explain E0382`.
---
[01:12:27] 10 
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-migrate-to-nll.edition/borrowck-migrate-to-nll.edition.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args borrowck/borrowck-migrate-to-nll.rs`
[01:12:27] 
[01:12:27] error in revision `edition`: 1 errors occurred comparing output.
[01:12:27] status: exit code: 0
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] warning[E0507]: cannot move out of borrowed content
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-migrate-to-nll.rs:25:17
[01:12:27]    |
[01:12:27] LL |                 (|| { let bar = foo; bar.take() })();
[01:12:27]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot move out of borrowed content
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
---
[01:12:27] 10 
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-migrate-to-nll.zflag/borrowck-migrate-to-nll.zflag.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args borrowck/borrowck-migrate-to-nll.rs`
[01:12:27] 
[01:12:27] error in revision `zflag`: 1 errors occurred comparing output.
[01:12:27] status: exit code: 0
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] warning[E0507]: cannot move out of borrowed content
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-migrate-to-nll.rs:25:17
[01:12:27]    |
[01:12:27] LL |                 (|| { let bar = foo; bar.take() })();
[01:12:27]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot move out of borrowed content
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
---
[01:12:27] 29    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27] 30    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] +    = note: for more information, try `rustc --explain E0729`
[01:12:27] 31 
[01:12:27] 32 warning[E0510]: cannot mutably borrow `x` in match guard
[01:12:27] 
[01:12:27] 40    |
[01:12:27] 41    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27] 42    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] 42    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] +    = note: for more information, try `rustc --explain E0729`
[01:12:27] 43 
[01:12:27] 44 error: aborting due to 3 previous errors
[01:12:27] 45 
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/borrowck/borrowck-mutate-in-guard/borrowck-mutate-in-guard.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args borrowck/borrowck-mutate-in-guard.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0302]: cannot assign in a pattern guard
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-mutate-in-guard.rs:10:25
[01:12:27]    |
[01:12:27] LL |         Enum::A(_) if { x = Enum::B(false); false } => 1,
[01:12:27]    |                         ^^^^^^^^^^^^^^^^^^ assignment in pattern guard
[01:12:27] error[E0301]: cannot mutably borrow in a pattern guard
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-mutate-in-guard.rs:15:38
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
[01:12:27]    |                                      ^ borrowed mutably in pattern guard
[01:12:27]    |
[01:12:27]    = help: add #![feature(bind_by_move_pattern_guards)] to the crate attributes to enable
[01:12:27] error[E0302]: cannot assign in a pattern guard
[01:12:27]   --> /checkout/src/test/ui/borrowck/borrowck-mutate-in-guard.rs:15:41
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
[01:12:27]    |                                         ^^^^^^^^^^^^^^^^^^^ assignment in pattern guard
[01:12:27] 
[01:12:27] warning[E0510]: cannot assign `x` in match guard
[01:12:27]    |
[01:12:27] LL |     match x {
[01:12:27] LL |     match x {
[01:12:27]    |           - value is immutable in match guard
[01:12:27] LL |         Enum::A(_) if { x = Enum::B(false); false } => 1,
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] warning[E0510]: cannot mutably borrow `x` in match guard
[01:12:27]    |
[01:12:27] LL |     match x {
[01:12:27] LL |     match x {
[01:12:27]    |           - value is immutable in match guard
[01:12:27] ...
[01:12:27] LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
---
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const_let_refutable/const_let_refutable.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args consts/const_let_refutable.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0005]: refutable pattern in function argument: `&[]` not covered
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn slice([a, b]: &[i32]) -> i32 { //~ ERROR refutable pattern in function argument
[01:12:27]    |                ^^^^^^ pattern `&[]` not covered
[01:12:27] 
[01:12:27] error[E0723]: can only call other `const fn` within a `const fn`, but `const std::ops::Add::add` is not stable as `const fn`
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |     a + b //~ ERROR can only call other `const fn` within a `const fn`
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] warning[E0381]: use of possibly uninitialized variable: `a`
[01:12:27]   --> /checkout/src/test/ui/consts/const_let_refutable.rs:4:5
[01:12:27]    |
[01:12:27] LL |     a + b //~ ERROR can only call other `const fn` within a `const fn`
[01:12:27]    |     ^ use of possibly uninitialized `a`
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] 
[01:12:27] warning[E0381]: use of possibly uninitialized variable: `b`
[01:12:27]   --> /checkout/src/test/ui/consts/const_let_refutable.rs:4:9
[01:12:27]    |
[01:12:27] thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:512:22
[01:12:27] note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
[01:12:27] LL |     a + b //~ ERROR can only call other `const fn` within a `const fn`
[01:12:27]    |         ^ use of possibly uninitialized `b`
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
---
[01:12:27] 32 
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] 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
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args consts/min_const_fn/min_const_fn_dyn.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:9:5
[01:12:27]    |
[01:12:27] LL |     x.0.field;
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:12:66
[01:12:27]    |
[01:12:27] LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] warning[E0716]: temporary value dropped while borrowed
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:12:67
[01:12:27]    |
[01:12:27] LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
[01:12:27]    |                                                                  -^    - temporary value is freed at the end of this statement
[01:12:27]    |                                                                  |creates a temporary which is freed while still in use
[01:12:27]    |                                                                  cast requires that borrow lasts for `'static`
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
---
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] 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
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args consts/min_const_fn/min_const_fn.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0493]: destructors cannot be evaluated at compile-time
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:37:25
[01:12:27]    |
[01:12:27] LL |     const fn into_inner(self) -> T { self.0 } //~ destructors cannot be evaluated
[01:12:27]    |                         ^^^^ constant functions cannot evaluate destructors
[01:12:27] error[E0723]: mutable references in const fn are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:39:36
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |     const fn get_mut(&mut self) -> &mut T { &mut self.0 }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0493]: destructors cannot be evaluated at compile-time
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:44:28
[01:12:27]    |
[01:12:27] LL |     const fn into_inner_lt(self) -> T { self.0 } //~ destructors cannot be evaluated
[01:12:27]    |                            ^^^^ constant functions cannot evaluate destructors
[01:12:27] error[E0723]: mutable references in const fn are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:46:42
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |     const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0493]: destructors cannot be evaluated at compile-time
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:51:27
[01:12:27]    |
[01:12:27] LL |     const fn into_inner_s(self) -> T { self.0 } //~ ERROR destructors
[01:12:27]    |                           ^^^^ constant functions cannot evaluate destructors
[01:12:27] error[E0723]: mutable references in const fn are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:53:38
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |     const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: mutable references in const fn are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:58:39
[01:12:27]    |
[01:12:27] LL |     const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:76:16
[01:12:27]    |
[01:12:27] LL | const fn foo11<T: std::fmt::Display>(t: T) -> T { t }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:78:18
[01:12:27]    |
[01:12:27] LL | const fn foo11_2<T: Send>(t: T) -> T { t }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: only int, `bool` and `char` operations are stable in const fn
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn foo19(f: f32) -> f32 { f * 2.0 }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: only int, `bool` and `char` operations are stable in const fn
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn foo19_2(f: f32) -> f32 { 2.0 - f }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: only int and `bool` operations are stable in const fn
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:84:35
[01:12:27]    |
[01:12:27] LL | const fn foo19_3(f: f32) -> f32 { -f }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: only int, `bool` and `char` operations are stable in const fn
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn foo19_4(f: f32, g: f32) -> f32 { f / g }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: cannot access `static` items in const fn
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:90:27
[01:12:27]    |
[01:12:27] LL | const fn foo25() -> u32 { BAR } //~ ERROR cannot access `static` items in const fn
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: cannot access `static` items in const fn
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:91:36
[01:12:27]    |
[01:12:27] LL | const fn foo26() -> &'static u32 { &BAR } //~ ERROR cannot access `static` items
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: casting pointers to ints is unstable in const fn
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:92:42
[01:12:27]    |
[01:12:27] LL | const fn foo30(x: *const u32) -> usize { x as usize }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: casting pointers to ints is unstable in const fn
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:94:63
[01:12:27]    |
[01:12:27] LL | const fn foo30_with_unsafe(x: *const u32) -> usize { unsafe { x as usize } }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: casting pointers to ints is unstable in const fn
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:96:42
[01:12:27]    |
[01:12:27] LL | const fn foo30_2(x: *mut u32) -> usize { x as usize }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: casting pointers to ints is unstable in const fn
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:98:63
[01:12:27]    |
[01:12:27] LL | const fn foo30_2_with_unsafe(x: *mut u32) -> usize { unsafe { x as usize } }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: `if`, `match`, `&&` and `||` are not stable in const fn
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn foo30_4(b: bool) -> usize { if b { 1 } else { 42 } }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: `if`, `match`, `&&` and `||` are not stable in const fn
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn foo30_5(b: bool) { while b { } } //~ ERROR not stable in const fn
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: `if`, `match`, `&&` and `||` are not stable in const fn
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn foo36(a: bool, b: bool) -> bool { a && b }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: `if`, `match`, `&&` and `||` are not stable in const fn
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn foo37(a: bool, b: bool) -> bool { a || b }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: mutable references in const fn are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:108:14
[01:12:27]    |
[01:12:27] LL | const fn inc(x: &mut i32) { *x += 1 }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:113:6
[01:12:27]    |
[01:12:27] LL | impl<T: std::fmt::Debug> Foo<T> {
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:118:6
[01:12:27]    |
[01:12:27] LL | impl<T: std::fmt::Debug + Sized> Foo<T> {
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:123:6
[01:12:27]    |
[01:12:27] LL | impl<T: Sync + Sized> Foo<T> {
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: `impl Trait` in const fn is unstable
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn no_rpit2() -> AlanTuring<impl std::fmt::Debug> { AlanTuring(0) }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:131:34
[01:12:27]    |
[01:12:27] LL | const fn no_apit2(_x: AlanTuring<impl std::fmt::Debug>) {}
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:133:22
[01:12:27]    |
[01:12:27] LL | const fn no_apit(_x: impl std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized`
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: `impl Trait` in const fn is unstable
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const fn no_rpit() -> impl std::fmt::Debug {} //~ ERROR `impl Trait` in const fn is unstable
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:135:23
[01:12:27]    |
[01:12:27] LL | const fn no_dyn_trait(_x: &dyn std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized`
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:136:32
[01:12:27]    |
[01:12:27] LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] warning[E0515]: cannot return reference to temporary value
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:136:63
[01:12:27]    |
[01:12:27] LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
[01:12:27]    |                                                               ^--
[01:12:27]    |                                                               |temporary value created here
[01:12:27]    |                                                               returns a reference to data owned by the current function
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:144:41
[01:12:27]    |
[01:12:27] LL | const fn really_no_traits_i_mean_it() { (&() as &std::fmt::Debug, ()).1 }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: function pointers in const fn are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:147:21
[01:12:27]    |
[01:12:27] LL | const fn no_fn_ptrs(_x: fn()) {}
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
[01:12:27] 
[01:12:27] error[E0723]: function pointers in const fn are unstable
[01:12:27]   --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:149:27
[01:12:27]    |
[01:12:27] LL | const fn no_fn_ptrs2() -> fn() { fn foo() {} foo }
[01:12:27]    |
[01:12:27]    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
[01:12:27]    = help: add #![feature(const_fn)] to the crate attributes to enable
[01:12:27] 
---
[01:12:27] 24 
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/empty/empty-never-array/empty-never-array.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args empty/empty-never-array.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0005]: refutable pattern in local binding: `T(_, _)` not covered
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | / enum Helper<T, U> {
[01:12:27] LL | |     T(T, [!; 0]),
[01:12:27] LL | |     #[allow(dead_code)]
[01:12:27] LL | |     U(U),
[01:12:27] LL | | }
[01:12:27]    | |_- `Helper<T, U>` defined here
[01:12:27] ...
[01:12:27] LL |       let Helper::U(u) = Helper::T(t, []);
[01:12:27]    |           ^^^^^^^^^^^^ pattern `T(_, _)` not covered
[01:12:27] warning[E0381]: use of possibly uninitialized variable: `u`
[01:12:27]   --> /checkout/src/test/ui/empty/empty-never-array.rs:12:5
[01:12:27]    |
[01:12:27] LL |     u
[01:12:27] LL |     u
[01:12:27]    |     ^ use of possibly uninitialized `u`
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
---
[01:12:27] 16   --> $DIR/feature-gate-nll.rs:10:1
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/feature-gates/feature-gate-nll/feature-gate-nll.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args feature-gates/feature-gate-nll.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] warning[E0502]: cannot borrow `*x.1` as immutable because it is also borrowed as mutable
[01:12:27]    |
[01:12:27] LL |     let m = &mut x;
[01:12:27]    |             ------ mutable borrow occurs here
[01:12:27]    |             ------ mutable borrow occurs here
[01:12:27] LL |     let p = &*x.1;
[01:12:27] ...
[01:12:27] LL |     m;
[01:12:27]    |     - mutable borrow later used here
[01:12:27]    |
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] error: compilation successful
[01:12:27]   --> /checkout/src/test/ui/feature-gates/feature-gate-nll.rs:10:1
[01:12:27]    |
[01:12:27] LL | / fn main() { //~ ERROR compilation successful
[01:12:27] LL | |     let mut x = (33, &0);
[01:12:27] LL | |     let m = &mut x;
[01:12:27] ...  |
[01:12:27] LL | |     m;
[01:12:27] LL | | }
---
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-15381/issue-15381.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args issues/issue-15381.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0005]: refutable pattern in `for` loop binding: `&[]` not covered
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |     for &[x,y,z] in values.chunks(3).filter(|&xs| xs.len() == 3) {
[01:12:27]    |         ^^^^^^^^ pattern `&[]` not covered
[01:12:27] warning[E0381]: borrow of possibly uninitialized variable: `y`
[01:12:27]   --> /checkout/src/test/ui/issues/issue-15381.rs:6:26
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |         println!("y={}", y);
[01:12:27]    |                          ^ use of possibly uninitialized `y`
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
---
[01:12:27] 
[01:12:27] ---- [ui] ui/issues/issue-40510-1.rs stdout ----
[01:12:27] diff of stderr:
[01:12:27] 
[01:12:27] 10    = note: ...therefore, they cannot allow references to captured variables to escape
[01:12:27] 12    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] +    = note: for more information, try `rustc --explain E0729`
[01:12:27] 13 
[01:12:27] 14 
[01:12:27] 14 
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-40510-1/issue-40510-1.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args issues/issue-40510-1.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 0
[01:12:27] status: exit code: 0
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] warning: captured variable cannot escape `FnMut` closure body
[01:12:27]    |
[01:12:27] LL |     || {
[01:12:27] LL |     || {
[01:12:27]    |      - inferred to be a `FnMut` closure
[01:12:27] LL |         &mut x
[01:12:27]    |         ^^^^^^ returns a reference to a captured variable which escapes the closure body
[01:12:27]    |
[01:12:27]    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:12:27]    = note: ...therefore, they cannot allow references to captured variables to escape
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] 
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] 
[01:12:27] ---- [ui] ui/issues/issue-40510-3.rs stdout ----
[01:12:27] diff of stderr:
[01:12:27] 
[01:12:27] 12    = note: ...therefore, they cannot allow references to captured variables to escape
[01:12:27] 14    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] +    = note: for more information, try `rustc --explain E0729`
[01:12:27] 15 
[01:12:27] 16 
[01:12:27] 16 
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-40510-3/issue-40510-3.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args issues/issue-40510-3.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 0
[01:12:27] status: exit code: 0
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] warning: captured variable cannot escape `FnMut` closure body
[01:12:27]    |
[01:12:27] LL |       || {
[01:12:27] LL |       || {
[01:12:27]    |        - inferred to be a `FnMut` closure
[01:12:27] LL | |             x.push(())
[01:12:27] LL | |         }
[01:12:27]    | |_________^ returns a closure that contains a reference to a captured variable, which then escapes the closure body
[01:12:27]    |
[01:12:27]    |
[01:12:27]    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:12:27]    = note: ...therefore, they cannot allow references to captured variables to escape
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] 
---
[01:12:27] 44   --> $DIR/issue-45696-scribble-on-boxed-borrow.rs:80:1
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] 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
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args issues/issue-45696-scribble-on-boxed-borrow.rs`
[01:12:27] 
[01:12:27] error in revision `migrate`: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] warning[E0713]: borrow may still be in use when destructor runs
[01:12:27]   --> /checkout/src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.rs:51:5
[01:12:27]    |
[01:12:27] LL | fn scribbled<'a>(s: Scribble<'a>) -> &'a mut u32 {
[01:12:27]    |              -- lifetime `'a` defined here
[01:12:27] LL |     &mut *s.0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
[01:12:27]    |     ^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
[01:12:27] LL | }
[01:12:27] LL | }
[01:12:27]    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] 
[01:12:27] warning[E0713]: borrow may still be in use when destructor runs
[01:12:27]   --> /checkout/src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.rs:62:5
[01:12:27]    |
[01:12:27] LL | fn boxed_scribbled<'a>(s: Box<Scribble<'a>>) -> &'a mut u32 {
[01:12:27]    |                    -- lifetime `'a` defined here
[01:12:27] LL |     &mut *(*s).0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
[01:12:27]    |     ^^^^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
[01:12:27] LL | }
[01:12:27] LL | }
[01:12:27]    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] 
[01:12:27] warning[E0713]: borrow may still be in use when destructor runs
[01:12:27]   --> /checkout/src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.rs:73:5
[01:12:27]    |
[01:12:27] LL | fn boxed_boxed_scribbled<'a>(s: Box<Box<Scribble<'a>>>) -> &'a mut u32 {
[01:12:27]    |                          -- lifetime `'a` defined here
[01:12:27] LL |     &mut *(**s).0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
[01:12:27]    |     ^^^^^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
[01:12:27] LL | }
[01:12:27] LL | }
[01:12:27]    | - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] 
[01:12:27] error: compilation successful
[01:12:27]   --> /checkout/src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.rs:80:1
[01:12:27]    |
[01:12:27] LL | / fn main() { //[migrate]~ ERROR compilation successful
[01:12:27] LL | |     {
[01:12:27] LL | |     {
[01:12:27] LL | |         let mut long_lived = Scribble(&mut x);
[01:12:27] ...  |
[01:12:27] LL | |     *boxed_boxed_scribbled(Box::new(Box::new(Scribble(&mut x)))) += 10;
[01:12:27]    | |_^
[01:12:27] 
[01:12:27] error: aborting due to previous error
[01:12:27] 
---
[01:12:27] 
[01:12:27] ---- [ui] ui/issues/issue-49824.rs stdout ----
[01:12:27] diff of stderr:
[01:12:27] 
[01:12:27] 15    = note: ...therefore, they cannot allow references to captured variables to escape
[01:12:27] 17    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27] +    = note: for more information, try `rustc --explain E0729`
[01:12:27] 18 
[01:12:27] 19 error: compilation successful
[01:12:27] 19 error: compilation successful
[01:12:27] 20   --> $DIR/issue-49824.rs:6:1
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-49824/issue-49824.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args issues/issue-49824.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] warning: captured variable cannot escape `FnMut` closure body
[01:12:27]    |
[01:12:27] LL |       || {
[01:12:27] LL |       || {
[01:12:27]    |        - inferred to be a `FnMut` closure
[01:12:27] LL | /         || {
[01:12:27] LL | |         //~^ WARNING captured variable cannot escape `FnMut` closure body
[01:12:27] LL | |         //~| WARNING this error has been downgraded to a warning
[01:12:27] LL | |         //~| WARNING this warning will become a hard error in the future
[01:12:27] LL | |             let _y = &mut x;
[01:12:27]    | |_________^ returns a closure that contains a reference to a captured variable, which then escapes the closure body
[01:12:27]    |
[01:12:27]    |
[01:12:27]    = note: `FnMut` closures only have access to their captured variables while they are executing...
[01:12:27]    = note: ...therefore, they cannot allow references to captured variables to escape
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] error: compilation successful
---
[01:12:27] 23 
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/pattern/pattern-bindings-after-at/pattern-bindings-after-at.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args pattern/pattern-bindings-after-at.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0303]: pattern bindings are not allowed after an `@`
[01:12:27]   --> /checkout/src/test/ui/pattern/pattern-bindings-after-at.rs:8:31
[01:12:27]    |
[01:12:27] LL |         ref mut z @ &mut Some(ref a) => {
[01:12:27]    |                               ^^^^^ not allowed after `@`
[01:12:27] warning[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
[01:12:27]   --> /checkout/src/test/ui/pattern/pattern-bindings-after-at.rs:8:31
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |         ref mut z @ &mut Some(ref a) => {
[01:12:27]    |         |                     |
[01:12:27]    |         |                     immutable borrow occurs here
[01:12:27]    |         mutable borrow occurs here
[01:12:27] ...
[01:12:27] ...
[01:12:27] LL |             **z = None;
[01:12:27]    |             ---------- mutable borrow later used here
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
---
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] 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
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args recursion/recursive-types-are-not-uninhabited.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0005]: refutable pattern in local binding: `Err(_)` not covered
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL |     let Ok(x) = res;
[01:12:27] 
[01:12:27] 
[01:12:27] warning[E0381]: use of possibly uninitialized variable: `x`
[01:12:27]    |
[01:12:27] LL |     x
[01:12:27] LL |     x
[01:12:27]    |     ^ use of possibly uninitialized `x`
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
---
[01:12:27] 48   --> $DIR/thread-local-in-ctfe.rs:25:5
[01:12:27] 
[01:12:27] 
[01:12:27] The actual stderr differed from the expected stderr.
[01:12:27] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/thread-local-in-ctfe/thread-local-in-ctfe.stderr
[01:12:27] To update references, rerun the tests and pass the `--bless` flag
[01:12:27] To only update this specific test, also pass `--test-args thread-local-in-ctfe.rs`
[01:12:27] error: 1 errors occurred comparing output.
[01:12:27] status: exit code: 1
[01:12:27] status: exit code: 1
[01:12:27] 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"
[01:12:27] ------------------------------------------
[01:12:27] 
[01:12:27] ------------------------------------------
[01:12:27] stderr:
[01:12:27] stderr:
[01:12:27] ------------------------------------------
[01:12:27] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:12:27]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:6:17
[01:12:27]    |
[01:12:27] LL | static B: u32 = A;
[01:12:27] 
[01:12:27] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:12:27]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:9:18
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | static C: &u32 = &A;
[01:12:27] 
[01:12:27] warning[E0712]: thread-local variable borrowed past end of function
[01:12:27]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:9:18
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | static C: &u32 = &A;
[01:12:27]    |                  ^^- end of enclosing function is here
[01:12:27]    |                  thread-local variables cannot be borrowed beyond the end of the function
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[01:12:27]    = note: for more information, try `rustc --explain E0729`
[01:12:27] 
[01:12:27] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:12:27]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:15:16
[01:12:27]    |
[01:12:27] LL | const D: u32 = A;
[01:12:27] 
[01:12:27] error[E0625]: thread-local statics cannot be accessed at compile-time
[01:12:27]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:18:17
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const E: &u32 = &A;
[01:12:27] 
[01:12:27] warning[E0712]: thread-local variable borrowed past end of function
[01:12:27]   --> /checkout/src/test/ui/thread-local-in-ctfe.rs:18:17
[01:12:27]    |
[01:12:27]    |
[01:12:27] LL | const E: &u32 = &A;
[01:12:27]    |                 ^^- end of enclosing function is here
[01:12:27]    |                 thread-local variables cannot be borrowed beyond the end of the function
[01:12:27]    |
[01:12:27]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[01:12:27]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
---
[01:12:27] test result: FAILED. 5491 passed; 18 failed; 21 ignored; 0 measured; 0 filtered out
[01:12:27] 
[01:12:27] 
[01:12:27] 
[01:12:27] 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"
[01:12:27] 
[01:12:27] 
[01:12:27] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test
[01:12:27] Build completed unsuccessfully in 0:04:34
[01:12:27] Build completed unsuccessfully in 0:04:34
[01:12:27] Makefile:48: recipe for target 'check' failed
[01:12:27] make: *** [check] Error 1
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:0b0d450c
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Tue May 14 17:49:57 UTC 2019

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)

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bors commented May 17, 2019

☔ The latest upstream changes (presumably #60171) made this pull request unmergeable. Please resolve the merge conflicts.

@jethrogb
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Pushed changes.

@pnkfelix
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@bors r+ rollup

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bors commented May 22, 2019

📌 Commit 33fb1c5 has been approved by pnkfelix

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 22, 2019
Centril added a commit to Centril/rust that referenced this pull request May 22, 2019
@Centril
Rollup merge of rust-lang#60809 - jethrogb:jb/nll-faq, r=pnkfelix
6212310 
Add FAQ for NLL migration

r? @pnkfelix

cc @oli-obk @davidtwco @Centril Since you've provided feedback on the warning wording before.
@Centril Centril mentioned this pull request May 22, 2019
Merged
bors added a commit that referenced this pull request May 22, 2019
@bors
Auto merge of #61044 - Centril:rollup-ztsgb9p, r=Centril
11f01bf 
Rollup of 8 pull requests

Successful merges:

 - #60300 (Allow null-pointer-optimized enums in FFI if their underlying representation is FFI safe)
 - #60773 (Always try to project predicates when finding auto traits in rustdoc)
 - #60809 (Add FAQ for NLL migration)
 - #61023 (Migrate from recursion to iterate on qualify consts visitor impl)
 - #61029 (Simplify RefCell minimum_spanning_tree example)
 - #61030 (Make maybe_codegen_consume_direct iterate instead of doing recursion)
 - #61034 (rustc_metadata: parametrize schema::CrateRoot by 'tcx and rip out old unused incremental infra.)
 - #61037 (Update clippy submodule)

Failed merges:

r? @ghost
@bors bors merged commit 33fb1c5 into rust-lang:master May 23, 2019
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@jethrogb @rust-highfive @bors @pnkfelix @Centril