Auto merge of #106582 - compiler-errors:better-spans-on-bad-tys, r=lcnr

Improve spans of non-WF implied bound types

Fixes #60980

17 files changed, 64 insertions, 87 deletions

diff --git a/src/test/ui/associated-types/associated-types-for-unimpl-trait.stderr b/src/test/ui/associated-types/associated-types-for-unimpl-trait.stderr
index 389cc7beddd..6552c8be780 100644
--- a/src/test/ui/associated-types/associated-types-for-unimpl-trait.stderr
+++ b/src/test/ui/associated-types/associated-types-for-unimpl-trait.stderr
@@ -1,8 +1,8 @@
 error[E0277]: the trait bound `Self: Get` is not satisfied
-  --> $DIR/associated-types-for-unimpl-trait.rs:10:5
+  --> $DIR/associated-types-for-unimpl-trait.rs:10:40
    |
 LL |     fn uhoh<U:Get>(&self, foo: U, bar: <Self as Get>::Value) {}
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `Self`
+   |                                        ^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `Self`
    |
 help: consider further restricting `Self`
    |
diff --git a/src/test/ui/associated-types/associated-types-no-suitable-bound.stderr b/src/test/ui/associated-types/associated-types-no-suitable-bound.stderr
index 1feaa612ee6..b2ee1b5e6d0 100644
--- a/src/test/ui/associated-types/associated-types-no-suitable-bound.stderr
+++ b/src/test/ui/associated-types/associated-types-no-suitable-bound.stderr
@@ -1,8 +1,8 @@
 error[E0277]: the trait bound `T: Get` is not satisfied
-  --> $DIR/associated-types-no-suitable-bound.rs:11:5
+  --> $DIR/associated-types-no-suitable-bound.rs:11:21
    |
 LL |     fn uhoh<T>(foo: <T as Get>::Value) {}
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `T`
+   |                     ^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `T`
    |
 help: consider restricting type parameter `T`
    |
diff --git a/src/test/ui/associated-types/associated-types-no-suitable-supertrait-2.stderr b/src/test/ui/associated-types/associated-types-no-suitable-supertrait-2.stderr
index cc3ed556115..2e40dbd065d 100644
--- a/src/test/ui/associated-types/associated-types-no-suitable-supertrait-2.stderr
+++ b/src/test/ui/associated-types/associated-types-no-suitable-supertrait-2.stderr
@@ -1,8 +1,8 @@
 error[E0277]: the trait bound `Self: Get` is not satisfied
-  --> $DIR/associated-types-no-suitable-supertrait-2.rs:17:5
+  --> $DIR/associated-types-no-suitable-supertrait-2.rs:17:40
    |
 LL |     fn uhoh<U:Get>(&self, foo: U, bar: <Self as Get>::Value) {}
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `Self`
+   |                                        ^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `Self`
    |
 help: consider further restricting `Self`
    |
diff --git a/src/test/ui/associated-types/associated-types-no-suitable-supertrait.stderr b/src/test/ui/associated-types/associated-types-no-suitable-supertrait.stderr
index 18f2830d8b2..bd3ee2abd2c 100644
--- a/src/test/ui/associated-types/associated-types-no-suitable-supertrait.stderr
+++ b/src/test/ui/associated-types/associated-types-no-suitable-supertrait.stderr
@@ -1,14 +1,14 @@
 error[E0277]: the trait bound `(T, U): Get` is not satisfied
-  --> $DIR/associated-types-no-suitable-supertrait.rs:22:5
+  --> $DIR/associated-types-no-suitable-supertrait.rs:22:40
    |
 LL |     fn uhoh<U:Get>(&self, foo: U, bar: <(T, U) as Get>::Value) {}
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `(T, U)`
+   |                                        ^^^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `(T, U)`
 
 error[E0277]: the trait bound `Self: Get` is not satisfied
-  --> $DIR/associated-types-no-suitable-supertrait.rs:17:5
+  --> $DIR/associated-types-no-suitable-supertrait.rs:17:40
    |
 LL |     fn uhoh<U:Get>(&self, foo: U, bar: <Self as Get>::Value) {}
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `Self`
+   |                                        ^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `Self`
    |
 help: consider further restricting `Self`
    |
diff --git a/src/test/ui/associated-types/associated-types-projection-to-unrelated-trait-in-method-without-default.stderr b/src/test/ui/associated-types/associated-types-projection-to-unrelated-trait-in-method-without-default.stderr
index 66d59bccdbb..2e67c21940f 100644
--- a/src/test/ui/associated-types/associated-types-projection-to-unrelated-trait-in-method-without-default.stderr
+++ b/src/test/ui/associated-types/associated-types-projection-to-unrelated-trait-in-method-without-default.stderr
@@ -1,8 +1,8 @@
 error[E0277]: the trait bound `Self: Get` is not satisfied
-  --> $DIR/associated-types-projection-to-unrelated-trait-in-method-without-default.rs:10:5
+  --> $DIR/associated-types-projection-to-unrelated-trait-in-method-without-default.rs:10:40
    |
 LL |     fn okay<U:Get>(&self, foo: U, bar: <Self as Get>::Value);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `Self`
+   |                                        ^^^^^^^^^^^^^^^^^^^^ the trait `Get` is not implemented for `Self`
    |
 help: consider further restricting `Self`
    |
diff --git a/src/test/ui/associated-types/issue-59324.rs b/src/test/ui/associated-types/issue-59324.rs
index 9e68e9e7751..551f13ee178 100644
--- a/src/test/ui/associated-types/issue-59324.rs
+++ b/src/test/ui/associated-types/issue-59324.rs
@@ -15,9 +15,9 @@ pub trait ThriftService<Bug: NotFoo>:
 {
     fn get_service(
     //~^ ERROR the trait bound `Bug: Foo` is not satisfied
-    //~| ERROR the trait bound `Bug: Foo` is not satisfied
         &self,
     ) -> Self::AssocType;
+    //~^ ERROR the trait bound `Bug: Foo` is not satisfied
 }
 
 fn with_factory<H>(factory: dyn ThriftService<()>) {}
diff --git a/src/test/ui/associated-types/issue-59324.stderr b/src/test/ui/associated-types/issue-59324.stderr
index 62cf1f37a77..a84b599b52b 100644
--- a/src/test/ui/associated-types/issue-59324.stderr
+++ b/src/test/ui/associated-types/issue-59324.stderr
@@ -20,7 +20,7 @@ LL | |
 LL | |
 LL | |     Service<AssocType = <Bug as Foo>::OnlyFoo>
 ...  |
-LL | |     ) -> Self::AssocType;
+LL | |
 LL | | }
    | |_^ the trait `Foo` is not implemented for `Bug`
    |
@@ -34,7 +34,6 @@ error[E0277]: the trait bound `Bug: Foo` is not satisfied
    |
 LL | /     fn get_service(
 LL | |
-LL | |
 LL | |         &self,
 LL | |     ) -> Self::AssocType;
    | |_________________________^ the trait `Foo` is not implemented for `Bug`
@@ -45,20 +44,16 @@ LL | pub trait ThriftService<Bug: NotFoo + Foo>:
    |                                     +++++
 
 error[E0277]: the trait bound `(): Foo` is not satisfied
-  --> $DIR/issue-59324.rs:23:1
+  --> $DIR/issue-59324.rs:23:29
    |
 LL | fn with_factory<H>(factory: dyn ThriftService<()>) {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Foo` is not implemented for `()`
+   |                             ^^^^^^^^^^^^^^^^^^^^^ the trait `Foo` is not implemented for `()`
 
 error[E0277]: the trait bound `Bug: Foo` is not satisfied
-  --> $DIR/issue-59324.rs:16:5
+  --> $DIR/issue-59324.rs:19:10
    |
-LL | /     fn get_service(
-LL | |
-LL | |
-LL | |         &self,
-LL | |     ) -> Self::AssocType;
-   | |_________________________^ the trait `Foo` is not implemented for `Bug`
+LL |     ) -> Self::AssocType;
+   |          ^^^^^^^^^^^^^^^ the trait `Foo` is not implemented for `Bug`
    |
 help: consider further restricting this bound
    |
diff --git a/src/test/ui/issues/issue-18611.stderr b/src/test/ui/issues/issue-18611.stderr
index 22c3470b61e..bd18d46223e 100644
--- a/src/test/ui/issues/issue-18611.stderr
+++ b/src/test/ui/issues/issue-18611.stderr
@@ -1,10 +1,8 @@
 error[E0277]: the trait bound `isize: HasState` is not satisfied
-  --> $DIR/issue-18611.rs:1:1
+  --> $DIR/issue-18611.rs:1:18
    |
-LL | / fn add_state(op: <isize as HasState>::State) {
-LL | |
-LL | | }
-   | |_^ the trait `HasState` is not implemented for `isize`
+LL | fn add_state(op: <isize as HasState>::State) {
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `HasState` is not implemented for `isize`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-20831-debruijn.stderr b/src/test/ui/issues/issue-20831-debruijn.stderr
index ef62dece836..c3af1f6786b 100644
--- a/src/test/ui/issues/issue-20831-debruijn.stderr
+++ b/src/test/ui/issues/issue-20831-debruijn.stderr
@@ -1,14 +1,8 @@
 error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` due to conflicting requirements
-  --> $DIR/issue-20831-debruijn.rs:28:5
+  --> $DIR/issue-20831-debruijn.rs:28:33
    |
-LL | /     fn subscribe(&mut self, t : Box<dyn Subscriber<Input=<Self as Publisher>::Output> + 'a>) {
-LL | |         // Not obvious, but there is an implicit lifetime here -------^
-LL | |
-LL | |         //
-...  |
-LL | |         self.sub = t;
-LL | |     }
-   | |_____^
+LL |     fn subscribe(&mut self, t : Box<dyn Subscriber<Input=<Self as Publisher>::Output> + 'a>) {
+   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: first, the lifetime cannot outlive the anonymous lifetime defined here...
   --> $DIR/issue-20831-debruijn.rs:28:58
@@ -21,16 +15,10 @@ note: ...but the lifetime must also be valid for the lifetime `'a` as defined he
 LL | impl<'a> Publisher<'a> for MyStruct<'a> {
    |      ^^
 note: ...so that the types are compatible
-  --> $DIR/issue-20831-debruijn.rs:28:5
+  --> $DIR/issue-20831-debruijn.rs:28:33
    |
-LL | /     fn subscribe(&mut self, t : Box<dyn Subscriber<Input=<Self as Publisher>::Output> + 'a>) {
-LL | |         // Not obvious, but there is an implicit lifetime here -------^
-LL | |
-LL | |         //
-...  |
-LL | |         self.sub = t;
-LL | |     }
-   | |_____^
+LL |     fn subscribe(&mut self, t : Box<dyn Subscriber<Input=<Self as Publisher>::Output> + 'a>) {
+   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: expected `<MyStruct<'a> as Publisher<'_>>`
               found `<MyStruct<'_> as Publisher<'_>>`
 
diff --git a/src/test/ui/issues/issue-35570.stderr b/src/test/ui/issues/issue-35570.stderr
index ebc40f6786f..3dc33729d8f 100644
--- a/src/test/ui/issues/issue-35570.stderr
+++ b/src/test/ui/issues/issue-35570.stderr
@@ -1,4 +1,10 @@
 error[E0277]: the trait bound `for<'a> (): Trait2<'a>` is not satisfied
+  --> $DIR/issue-35570.rs:8:40
+   |
+LL | fn _ice(param: Box<dyn for <'a> Trait1<<() as Trait2<'a>>::Ty>>) {
+   |                                        ^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'a> Trait2<'a>` is not implemented for `()`
+
+error[E0277]: the trait bound `for<'a> (): Trait2<'a>` is not satisfied
   --> $DIR/issue-35570.rs:8:1
    |
 LL | / fn _ice(param: Box<dyn for <'a> Trait1<<() as Trait2<'a>>::Ty>>) {
@@ -8,12 +14,6 @@ LL | |     let _e: (usize, usize) = unsafe{mem::transmute(param)};
 LL | | }
    | |_^ the trait `for<'a> Trait2<'a>` is not implemented for `()`
 
-error[E0277]: the trait bound `for<'a> (): Trait2<'a>` is not satisfied
-  --> $DIR/issue-35570.rs:8:40
-   |
-LL | fn _ice(param: Box<dyn for <'a> Trait1<<() as Trait2<'a>>::Ty>>) {
-   |                                        ^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'a> Trait2<'a>` is not implemented for `()`
-
 error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/nll/normalization-bounds-error.stderr b/src/test/ui/nll/normalization-bounds-error.stderr
index 6abe53127c3..0fc3670d6c5 100644
--- a/src/test/ui/nll/normalization-bounds-error.stderr
+++ b/src/test/ui/nll/normalization-bounds-error.stderr
@@ -1,8 +1,8 @@
 error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'d` due to conflicting requirements
-  --> $DIR/normalization-bounds-error.rs:12:1
+  --> $DIR/normalization-bounds-error.rs:12:31
    |
 LL | fn visit_seq<'d, 'a: 'd>() -> <&'a () as Visitor<'d>>::Value {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: first, the lifetime cannot outlive the lifetime `'d` as defined here...
   --> $DIR/normalization-bounds-error.rs:12:14
@@ -15,10 +15,10 @@ note: ...but the lifetime must also be valid for the lifetime `'a` as defined he
 LL | fn visit_seq<'d, 'a: 'd>() -> <&'a () as Visitor<'d>>::Value {}
    |                  ^^
 note: ...so that the types are compatible
-  --> $DIR/normalization-bounds-error.rs:12:1
+  --> $DIR/normalization-bounds-error.rs:12:31
    |
 LL | fn visit_seq<'d, 'a: 'd>() -> <&'a () as Visitor<'d>>::Value {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: expected `Visitor<'d>`
               found `Visitor<'_>`
 
diff --git a/src/test/ui/regions/regions-implied-bounds-projection-gap-hr-1.stderr b/src/test/ui/regions/regions-implied-bounds-projection-gap-hr-1.stderr
index 66f592c34dd..3fd39810d44 100644
--- a/src/test/ui/regions/regions-implied-bounds-projection-gap-hr-1.stderr
+++ b/src/test/ui/regions/regions-implied-bounds-projection-gap-hr-1.stderr
@@ -1,12 +1,8 @@
 error[E0277]: the trait bound `for<'z> T: Trait2<'y, 'z>` is not satisfied
-  --> $DIR/regions-implied-bounds-projection-gap-hr-1.rs:21:1
+  --> $DIR/regions-implied-bounds-projection-gap-hr-1.rs:21:49
    |
-LL | / fn callee<'x, 'y, T>(t: &'x dyn for<'z> Trait1< <T as Trait2<'y, 'z>>::Foo >)
-LL | |
-LL | |
-LL | | {
-LL | | }
-   | |_^ the trait `for<'z> Trait2<'y, 'z>` is not implemented for `T`
+LL | fn callee<'x, 'y, T>(t: &'x dyn for<'z> Trait1< <T as Trait2<'y, 'z>>::Foo >)
+   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'z> Trait2<'y, 'z>` is not implemented for `T`
    |
 help: consider restricting type parameter `T`
    |
@@ -14,10 +10,14 @@ LL | fn callee<'x, 'y, T: for<'z> Trait2<'y, 'z>>(t: &'x dyn for<'z> Trait1< <T
    |                    ++++++++++++++++++++++++
 
 error[E0277]: the trait bound `for<'z> T: Trait2<'y, 'z>` is not satisfied
-  --> $DIR/regions-implied-bounds-projection-gap-hr-1.rs:21:49
+  --> $DIR/regions-implied-bounds-projection-gap-hr-1.rs:21:1
    |
-LL | fn callee<'x, 'y, T>(t: &'x dyn for<'z> Trait1< <T as Trait2<'y, 'z>>::Foo >)
-   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'z> Trait2<'y, 'z>` is not implemented for `T`
+LL | / fn callee<'x, 'y, T>(t: &'x dyn for<'z> Trait1< <T as Trait2<'y, 'z>>::Foo >)
+LL | |
+LL | |
+LL | | {
+LL | | }
+   | |_^ the trait `for<'z> Trait2<'y, 'z>` is not implemented for `T`
    |
 help: consider restricting type parameter `T`
    |
diff --git a/src/test/ui/specialization/min_specialization/issue-79224.rs b/src/test/ui/specialization/min_specialization/issue-79224.rs
index 408732fe944..104bddd076e 100644
--- a/src/test/ui/specialization/min_specialization/issue-79224.rs
+++ b/src/test/ui/specialization/min_specialization/issue-79224.rs
@@ -15,8 +15,10 @@ impl ToString for Cow<'_, str> {
     }
 }
 
-impl<B: ?Sized> Display for Cow<'_, B> { //~ ERROR: the trait bound `B: Clone` is not satisfied [E0277]
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { //~ ERROR: the trait bound `B: Clone` is not satisfied [E0277]
+impl<B: ?Sized> Display for Cow<'_, B> {
+    //~^ ERROR: the trait bound `B: Clone` is not satisfied [E0277]
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        //~^ ERROR: the trait bound `B: Clone` is not satisfied [E0277]
         write!(f, "foo")
     }
 }
diff --git a/src/test/ui/specialization/min_specialization/issue-79224.stderr b/src/test/ui/specialization/min_specialization/issue-79224.stderr
index fd34a59d2bd..be6f04ae62a 100644
--- a/src/test/ui/specialization/min_specialization/issue-79224.stderr
+++ b/src/test/ui/specialization/min_specialization/issue-79224.stderr
@@ -1,12 +1,8 @@
 error[E0277]: the trait bound `B: Clone` is not satisfied
-  --> $DIR/issue-79224.rs:18:1
+  --> $DIR/issue-79224.rs:18:17
    |
-LL | / impl<B: ?Sized> Display for Cow<'_, B> {
-LL | |     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-LL | |         write!(f, "foo")
-LL | |     }
-LL | | }
-   | |_^ the trait `Clone` is not implemented for `B`
+LL | impl<B: ?Sized> Display for Cow<'_, B> {
+   |                 ^^^^^^^ the trait `Clone` is not implemented for `B`
    |
    = note: required for `B` to implement `ToOwned`
 help: consider further restricting this bound
@@ -15,12 +11,10 @@ LL | impl<B: ?Sized + std::clone::Clone> Display for Cow<'_, B> {
    |                +++++++++++++++++++
 
 error[E0277]: the trait bound `B: Clone` is not satisfied
-  --> $DIR/issue-79224.rs:19:5
+  --> $DIR/issue-79224.rs:20:12
    |
-LL | /     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-LL | |         write!(f, "foo")
-LL | |     }
-   | |_____^ the trait `Clone` is not implemented for `B`
+LL |     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+   |            ^^^^^ the trait `Clone` is not implemented for `B`
    |
    = note: required for `B` to implement `ToOwned`
 help: consider further restricting this bound
diff --git a/src/test/ui/traits/issue-91594.stderr b/src/test/ui/traits/issue-91594.stderr
index 5fcd090a834..9f9acf85113 100644
--- a/src/test/ui/traits/issue-91594.stderr
+++ b/src/test/ui/traits/issue-91594.stderr
@@ -1,8 +1,8 @@
 error[E0277]: the trait bound `Foo: HasComponent<()>` is not satisfied
-  --> $DIR/issue-91594.rs:10:1
+  --> $DIR/issue-91594.rs:10:6
    |
 LL | impl HasComponent<<Foo as Component<Foo>>::Interface> for Foo {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `HasComponent<()>` is not implemented for `Foo`
+   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `HasComponent<()>` is not implemented for `Foo`
    |
    = help: the trait `HasComponent<<Foo as Component<Foo>>::Interface>` is implemented for `Foo`
 note: required for `Foo` to implement `Component<Foo>`
diff --git a/src/test/ui/wf/issue-103573.stderr b/src/test/ui/wf/issue-103573.stderr
index fcf3f15e4d3..5227badb77d 100644
--- a/src/test/ui/wf/issue-103573.stderr
+++ b/src/test/ui/wf/issue-103573.stderr
@@ -1,8 +1,8 @@
 error[E0277]: the trait bound `<<Self as TraitC<E>>::TypeC<'a> as TraitB>::TypeB: TraitA` is not satisfied
-  --> $DIR/issue-103573.rs:18:5
+  --> $DIR/issue-103573.rs:18:18
    |
 LL |     fn g<'a>(_: &<<Self::TypeC<'a> as TraitB>::TypeB as TraitA>::TypeA);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `TraitA` is not implemented for `<<Self as TraitC<E>>::TypeC<'a> as TraitB>::TypeB`
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `TraitA` is not implemented for `<<Self as TraitC<E>>::TypeC<'a> as TraitB>::TypeB`
    |
 help: consider further restricting the associated type
    |
diff --git a/src/test/ui/wf/wf-foreign-fn-decl-ret.stderr b/src/test/ui/wf/wf-foreign-fn-decl-ret.stderr
index 78312a09105..b03023b5fd1 100644
--- a/src/test/ui/wf/wf-foreign-fn-decl-ret.stderr
+++ b/src/test/ui/wf/wf-foreign-fn-decl-ret.stderr
@@ -1,8 +1,8 @@
 error[E0277]: the trait bound `(): Foo` is not satisfied
-  --> $DIR/wf-foreign-fn-decl-ret.rs:11:5
+  --> $DIR/wf-foreign-fn-decl-ret.rs:11:25
    |
 LL |     pub fn lint_me() -> <() as Foo>::Assoc;
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Foo` is not implemented for `()`
+   |                         ^^^^^^^^^^^^^^^^^^ the trait `Foo` is not implemented for `()`
 
 error[E0277]: the trait bound `u32: Unsatisfied` is not satisfied
   --> $DIR/wf-foreign-fn-decl-ret.rs:14:32