Auto merge of #53196 - davidtwco:compile-fail-to-ui, r=nikomatsakis

Move `compile-fail` tests to `ui`

Fixes #46841, #52531, #44844.

r? @nikomatsakis

src/librustc/traits/error_reporting.rs

@@ -435,13 +435,14 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
     }
 
     fn report_similar_impl_candidates(&self,
-                                      impl_candidates: Vec<ty::TraitRef<'tcx>>,
+                                      mut impl_candidates: Vec<ty::TraitRef<'tcx>>,
                                       err: &mut DiagnosticBuilder)
     {
         if impl_candidates.is_empty() {
             return;
         }
 
+        let len = impl_candidates.len();
         let end = if impl_candidates.len() <= 5 {
             impl_candidates.len()
         } else {
@@ -459,10 +460,17 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
             }
         });
 
+        // Sort impl candidates so that ordering is consistent for UI tests.
+        let normalized_impl_candidates = &mut impl_candidates[0..end]
+            .iter()
+            .map(normalize)
+            .collect::<Vec<String>>();
+        normalized_impl_candidates.sort();
+
         err.help(&format!("the following implementations were found:{}{}",
-                          &impl_candidates[0..end].iter().map(normalize).collect::<String>(),
-                          if impl_candidates.len() > 5 {
-                              format!("\nand {} others", impl_candidates.len() - 4)
+                          normalized_impl_candidates.join(""),
+                          if len > 5 {
+                              format!("\nand {} others", len - 4)
                           } else {
                               "".to_owned()
                           }

src/test/compile-fail/meta-expected-error-wrong-rev.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-compare-mode-nll
+
 // revisions: a
 // should-fail
 

src/test/ui/E0501.ast.nll.stderr

@@ -0,0 +1,31 @@
+error[E0501]: cannot borrow `*a` as mutable because previous closure requires unique access
+  --> $DIR/E0501.rs:28:23
+   |
+LL |     let bar = || {
+   |               -- closure construction occurs here
+LL |         inside_closure(a)
+   |                        - first borrow occurs due to use of `a` in closure
+LL |     };
+LL |     outside_closure_1(a); //[ast]~ ERROR cannot borrow `*a` as mutable because previous closure requires unique access
+   |                       ^ borrow occurs here
+...
+LL |     drop(bar);
+   |          --- borrow later used here
+
+error[E0501]: cannot borrow `*a` as immutable because previous closure requires unique access
+  --> $DIR/E0501.rs:31:23
+   |
+LL |     let bar = || {
+   |               -- closure construction occurs here
+LL |         inside_closure(a)
+   |                        - first borrow occurs due to use of `a` in closure
+...
+LL |     outside_closure_2(a); //[ast]~ ERROR cannot borrow `*a` as immutable because previous closure requires unique access
+   |                       ^ borrow occurs here
+...
+LL |     drop(bar);
+   |          --- borrow later used here
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0501`.

src/test/ui/E0501.ast.stderr

@@ -0,0 +1,31 @@
+error[E0501]: cannot borrow `*a` as mutable because previous closure requires unique access
+  --> $DIR/E0501.rs:28:23
+   |
+LL |     let bar = || {
+   |               -- closure construction occurs here
+LL |         inside_closure(a)
+   |                        - previous borrow occurs due to use of `a` in closure
+LL |     };
+LL |     outside_closure_1(a); //[ast]~ ERROR cannot borrow `*a` as mutable because previous closure requires unique access
+   |                       ^ borrow occurs here
+...
+LL | }
+   | - borrow from closure ends here
+
+error[E0501]: cannot borrow `*a` as immutable because previous closure requires unique access
+  --> $DIR/E0501.rs:31:23
+   |
+LL |     let bar = || {
+   |               -- closure construction occurs here
+LL |         inside_closure(a)
+   |                        - previous borrow occurs due to use of `a` in closure
+...
+LL |     outside_closure_2(a); //[ast]~ ERROR cannot borrow `*a` as immutable because previous closure requires unique access
+   |                       ^ borrow occurs here
+...
+LL | }
+   | - borrow from closure ends here
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0501`.

src/test/ui/E0501.mir.stderr

@@ -0,0 +1,31 @@
+error[E0501]: cannot borrow `*a` as mutable because previous closure requires unique access
+  --> $DIR/E0501.rs:28:23
+   |
+LL |     let bar = || {
+   |               -- closure construction occurs here
+LL |         inside_closure(a)
+   |                        - first borrow occurs due to use of `a` in closure
+LL |     };
+LL |     outside_closure_1(a); //[ast]~ ERROR cannot borrow `*a` as mutable because previous closure requires unique access
+   |                       ^ borrow occurs here
+...
+LL |     drop(bar);
+   |          --- borrow later used here
+
+error[E0501]: cannot borrow `*a` as immutable because previous closure requires unique access
+  --> $DIR/E0501.rs:31:23
+   |
+LL |     let bar = || {
+   |               -- closure construction occurs here
+LL |         inside_closure(a)
+   |                        - first borrow occurs due to use of `a` in closure
+...
+LL |     outside_closure_2(a); //[ast]~ ERROR cannot borrow `*a` as immutable because previous closure requires unique access
+   |                       ^ borrow occurs here
+...
+LL |     drop(bar);
+   |          --- borrow later used here
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0501`.

src/test/ui/E0506.ast.nll.stderr

@@ -0,0 +1,14 @@
+error[E0506]: cannot assign to `fancy_num` because it is borrowed
+  --> $DIR/E0506.rs:21:5
+   |
+LL |     let fancy_ref = &fancy_num;
+   |                     ---------- borrow of `fancy_num` occurs here
+LL |     fancy_num = FancyNum { num: 6 }; //[ast]~ ERROR E0506
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ assignment to borrowed `fancy_num` occurs here
+...
+LL |     println!("Num: {}, Ref: {}", fancy_num.num, fancy_ref.num);
+   |                                                 ------------- borrow later used here
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0506`.

src/test/ui/E0506.ast.stderr

@@ -0,0 +1,11 @@
+error[E0506]: cannot assign to `fancy_num` because it is borrowed
+  --> $DIR/E0506.rs:21:5
+   |
+LL |     let fancy_ref = &fancy_num;
+   |                      --------- borrow of `fancy_num` occurs here
+LL |     fancy_num = FancyNum { num: 6 }; //[ast]~ ERROR E0506
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ assignment to borrowed `fancy_num` occurs here
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0506`.

src/test/ui/E0506.mir.stderr

@@ -0,0 +1,14 @@
+error[E0506]: cannot assign to `fancy_num` because it is borrowed
+  --> $DIR/E0506.rs:21:5
+   |
+LL |     let fancy_ref = &fancy_num;
+   |                     ---------- borrow of `fancy_num` occurs here
+LL |     fancy_num = FancyNum { num: 6 }; //[ast]~ ERROR E0506
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ assignment to borrowed `fancy_num` occurs here
+...
+LL |     println!("Num: {}, Ref: {}", fancy_num.num, fancy_ref.num);
+   |                                                 ------------- borrow later used here
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0506`.

src/test/ui/E0508-fail.ast.stderr

@@ -0,0 +1,12 @@
+error[E0508]: cannot move out of type `[NonCopy; 1]`, a non-copy array
+  --> $DIR/E0508-fail.rs:18:18
+   |
+LL |     let _value = array[0];  //[ast]~ ERROR [E0508]
+   |                  ^^^^^^^^
+   |                  |
+   |                  cannot move out of here
+   |                  help: consider using a reference instead: `&array[0]`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0508`.

src/test/ui/E0508-fail.mir.stderr

@@ -0,0 +1,12 @@
+error[E0508]: cannot move out of type `[NonCopy; 1]`, a non-copy array
+  --> $DIR/E0508-fail.rs:18:18
+   |
+LL |     let _value = array[0];  //[ast]~ ERROR [E0508]
+   |                  ^^^^^^^^
+   |                  |
+   |                  cannot move out of here
+   |                  help: consider using a reference instead: `&array[0]`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0508`.

src/test/ui/E0508.ast.stderr

@@ -0,0 +1,12 @@
+error[E0508]: cannot move out of type `[NonCopy; 1]`, a non-copy array
+  --> $DIR/E0508.rs:18:18
+   |
+LL |     let _value = array[0];  //[ast]~ ERROR [E0508]
+   |                  ^^^^^^^^
+   |                  |
+   |                  cannot move out of here
+   |                  help: consider using a reference instead: `&array[0]`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0508`.

src/test/ui/E0508.mir.stderr

@@ -0,0 +1,12 @@
+error[E0508]: cannot move out of type `[NonCopy; 1]`, a non-copy array
+  --> $DIR/E0508.rs:18:18
+   |
+LL |     let _value = array[0];  //[ast]~ ERROR [E0508]
+   |                  ^^^^^^^^
+   |                  |
+   |                  cannot move out of here
+   |                  help: consider using a reference instead: `&array[0]`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0508`.

src/test/ui/E0583.stderr

@@ -0,0 +1,11 @@
+error[E0583]: file not found for module `module_that_doesnt_exist`
+  --> $DIR/E0583.rs:11:5
+   |
+LL | mod module_that_doesnt_exist; //~ ERROR E0583
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: name the file either module_that_doesnt_exist.rs or module_that_doesnt_exist/mod.rs inside the directory "$DIR"
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0583`.

src/test/ui/E0594.ast.nll.stderr

@@ -0,0 +1,9 @@
+error[E0594]: cannot assign to immutable static item `NUM`
+  --> $DIR/E0594.rs:17:5
+   |
+LL |     NUM = 20; //[ast]~ ERROR E0594
+   |     ^^^^^^^^ cannot assign
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0594`.

src/test/ui/E0594.ast.stderr

@@ -0,0 +1,9 @@
+error[E0594]: cannot assign to immutable static item
+  --> $DIR/E0594.rs:17:5
+   |
+LL |     NUM = 20; //[ast]~ ERROR E0594
+   |     ^^^^^^^^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0594`.

src/test/ui/E0594.mir.stderr

@@ -0,0 +1,9 @@
+error[E0594]: cannot assign to immutable static item `NUM`
+  --> $DIR/E0594.rs:17:5
+   |
+LL |     NUM = 20; //[ast]~ ERROR E0594
+   |     ^^^^^^^^ cannot assign
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0594`.

src/test/ui/E0596.ast.nll.stderr

@@ -0,0 +1,11 @@
+error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+  --> $DIR/E0596.rs:16:13
+   |
+LL |     let x = 1;
+   |         - help: consider changing this to be mutable: `mut x`
+LL |     let y = &mut x; //[ast]~ ERROR [E0596]
+   |             ^^^^^^ cannot borrow as mutable
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0596`.

src/test/ui/E0596.ast.stderr

@@ -0,0 +1,11 @@
+error[E0596]: cannot borrow immutable local variable `x` as mutable
+  --> $DIR/E0596.rs:16:18
+   |
+LL |     let x = 1;
+   |         - consider changing this to `mut x`
+LL |     let y = &mut x; //[ast]~ ERROR [E0596]
+   |                  ^ cannot borrow mutably
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0596`.

src/test/ui/E0596.mir.stderr

@@ -0,0 +1,11 @@
+error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+  --> $DIR/E0596.rs:16:13
+   |
+LL |     let x = 1;
+   |         - help: consider changing this to be mutable: `mut x`
+LL |     let y = &mut x; //[ast]~ ERROR [E0596]
+   |             ^^^^^^ cannot borrow as mutable
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0596`.

src/test/ui/absolute-paths-in-nested-use-groups.stderr

@@ -0,0 +1,21 @@
+error[E0433]: failed to resolve. crate root in paths can only be used in start position
+  --> $DIR/absolute-paths-in-nested-use-groups.rs:16:5
+   |
+LL |     ::bar,       //~ ERROR crate root in paths can only be used in start position
+   |     ^ crate root in paths can only be used in start position
+
+error[E0433]: failed to resolve. `super` in paths can only be used in start position
+  --> $DIR/absolute-paths-in-nested-use-groups.rs:17:5
+   |
+LL |     super::bar,  //~ ERROR `super` in paths can only be used in start position
+   |     ^^^^^ `super` in paths can only be used in start position
+
+error[E0433]: failed to resolve. `self` in paths can only be used in start position
+  --> $DIR/absolute-paths-in-nested-use-groups.rs:18:5
+   |
+LL |     self::bar,   //~ ERROR `self` in paths can only be used in start position
+   |     ^^^^ `self` in paths can only be used in start position
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0433`.

src/test/ui/access-mode-in-closures.nll.stderr

@@ -0,0 +1,12 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/access-mode-in-closures.rs:19:15
+   |
+LL |         match *s { sty(v) => v } //~ ERROR cannot move out
+   |               ^^       - move occurs because v has type `std::vec::Vec<isize>`, which does not implement the `Copy` trait
+   |               |
+   |               cannot move out of borrowed content
+   |               help: consider removing this dereference operator: `s`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0507`.

src/test/ui/access-mode-in-closures.stderr

@@ -0,0 +1,11 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/access-mode-in-closures.rs:19:15
+   |
+LL |         match *s { sty(v) => v } //~ ERROR cannot move out
+   |               ^^       - hint: to prevent move, use `ref v` or `ref mut v`
+   |               |
+   |               cannot move out of borrowed content
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0507`.

src/test/ui/alloc-error/alloc-error-handler-bad-signature-1.stderr

@@ -0,0 +1,14 @@
+error: return type should be `!`
+  --> $DIR/alloc-error-handler-bad-signature-1.rs:22:6
+   |
+LL | ) -> () //~ ERROR return type should be `!`
+   |      ^^
+
+error: argument should be `Layout`
+  --> $DIR/alloc-error-handler-bad-signature-1.rs:21:11
+   |
+LL |     info: &Layout, //~ ERROR argument should be `Layout`
+   |           ^^^^^^^
+
+error: aborting due to 2 previous errors
+

src/test/ui/alloc-error/alloc-error-handler-bad-signature-2.stderr

@@ -0,0 +1,14 @@
+error: return type should be `!`
+  --> $DIR/alloc-error-handler-bad-signature-2.rs:22:3
+   |
+LL | ) { //~ ERROR return type should be `!`
+   |   ^
+
+error: argument should be `Layout`
+  --> $DIR/alloc-error-handler-bad-signature-2.rs:21:11
+   |
+LL |     info: Layout, //~ ERROR argument should be `Layout`
+   |           ^^^^^^
+
+error: aborting due to 2 previous errors
+