Auto merge of #126951 - matthiaskrgr:rollup-xg0o4mc, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #126618 (Mark assoc tys live only if the corresponding trait is live)
 - #126746 (Deny `use<>` for RPITITs)
 - #126868 (not use offset when there is not ends with brace)
 - #126884 (Do not ICE when suggesting dereferencing closure arg)
 - #126893 (Eliminate the distinction between PREC_POSTFIX and PREC_PAREN precedence level)
 - #126915 (Don't suggest awaiting in closure patterns)
 - #126943 (De-duplicate all consecutive native libs regardless of their options)

r? `@ghost`
`@rustbot` modify labels: rollup

tests/run-make/print-native-static-libs/bar.rs

@@ -17,3 +17,9 @@ extern "C" {
 extern "C" {
     fn g_free2(p: *mut ());
 }
+
+#[cfg(windows)]
+#[link(name = "glib-2.0", kind = "raw-dylib")]
+extern "C" {
+    fn g_free3(p: *mut ());
+}

tests/ui/async-await/suggest-missing-await.rs

@@ -71,4 +71,11 @@ async fn suggest_await_in_generic_pattern() {
     }
 }
 
+// Issue #126903
+async fn do_async() {}
+fn dont_suggest_awaiting_closure_patterns() {
+    Some(do_async()).map(|()| {});
+    //~^ ERROR mismatched types [E0308]
+}
+
 fn main() {}

tests/ui/async-await/suggest-missing-await.stderr

@@ -133,6 +133,18 @@ help: consider `await`ing on the `Future`
 LL |     match dummy_result().await {
    |                         ++++++
 
-error: aborting due to 7 previous errors
+error[E0308]: mismatched types
+  --> $DIR/suggest-missing-await.rs:77:27
+   |
+LL |     Some(do_async()).map(|()| {});
+   |                           ^^
+   |                           |
+   |                           expected future, found `()`
+   |                           expected due to this
+   |
+   = note: expected opaque type `impl Future<Output = ()>`
+                found unit type `()`
+
+error: aborting due to 8 previous errors
 
 For more information about this error, try `rustc --explain E0308`.

tests/ui/const-generics/cross_crate_complex.rs

@@ -11,6 +11,7 @@ async fn foo() {
     async_in_foo(async_out_foo::<4>().await).await;
 }
 
+#[allow(dead_code)]
 struct Faz<const N: usize>;
 
 impl<const N: usize> Foo<N> for Faz<N> {}

tests/ui/generic-associated-types/missing-bounds.fixed

@@ -2,6 +2,7 @@
 
 use std::ops::Add;
 
+#[allow(dead_code)]
 struct A<B>(B);
 
 impl<B> Add for A<B> where B: Add<Output = B> {
@@ -12,6 +13,7 @@ impl<B> Add for A<B> where B: Add<Output = B> {
     }
 }
 
+#[allow(dead_code)]
 struct C<B>(B);
 
 impl<B: Add<Output = B>> Add for C<B> {
@@ -22,6 +24,7 @@ impl<B: Add<Output = B>> Add for C<B> {
     }
 }
 
+#[allow(dead_code)]
 struct D<B>(B);
 
 impl<B: std::ops::Add<Output = B>> Add for D<B> {
@@ -32,6 +35,7 @@ impl<B: std::ops::Add<Output = B>> Add for D<B> {
     }
 }
 
+#[allow(dead_code)]
 struct E<B>(B);
 
 impl<B: Add<Output = B>> Add for E<B> where B: Add<Output = B> {

tests/ui/generic-associated-types/missing-bounds.rs

@@ -2,6 +2,7 @@
 
 use std::ops::Add;
 
+#[allow(dead_code)]
 struct A<B>(B);
 
 impl<B> Add for A<B> where B: Add {
@@ -12,6 +13,7 @@ impl<B> Add for A<B> where B: Add {
     }
 }
 
+#[allow(dead_code)]
 struct C<B>(B);
 
 impl<B: Add> Add for C<B> {
@@ -22,6 +24,7 @@ impl<B: Add> Add for C<B> {
     }
 }
 
+#[allow(dead_code)]
 struct D<B>(B);
 
 impl<B> Add for D<B> {
@@ -32,6 +35,7 @@ impl<B> Add for D<B> {
     }
 }
 
+#[allow(dead_code)]
 struct E<B>(B);
 
 impl<B: Add> Add for E<B> where <B as Add>::Output = B {

tests/ui/generic-associated-types/missing-bounds.stderr

@@ -1,5 +1,5 @@
 error: equality constraints are not yet supported in `where` clauses
-  --> $DIR/missing-bounds.rs:37:33
+  --> $DIR/missing-bounds.rs:41:33
    |
 LL | impl<B: Add> Add for E<B> where <B as Add>::Output = B {
    |                                 ^^^^^^^^^^^^^^^^^^^^^^ not supported
@@ -11,7 +11,7 @@ LL | impl<B: Add> Add for E<B> where B: Add<Output = B> {
    |                                 ~~~~~~~~~~~~~~~~~~
 
 error[E0308]: mismatched types
-  --> $DIR/missing-bounds.rs:11:11
+  --> $DIR/missing-bounds.rs:12:11
    |
 LL | impl<B> Add for A<B> where B: Add {
    |      - expected this type parameter
@@ -24,14 +24,14 @@ LL |         A(self.0 + rhs.0)
    = note: expected type parameter `B`
              found associated type `<B as Add>::Output`
 help: the type constructed contains `<B as Add>::Output` due to the type of the argument passed
-  --> $DIR/missing-bounds.rs:11:9
+  --> $DIR/missing-bounds.rs:12:9
    |
 LL |         A(self.0 + rhs.0)
    |         ^^--------------^
    |           |
    |           this argument influences the type of `A`
 note: tuple struct defined here
-  --> $DIR/missing-bounds.rs:5:8
+  --> $DIR/missing-bounds.rs:6:8
    |
 LL | struct A<B>(B);
    |        ^
@@ -41,7 +41,7 @@ LL | impl<B> Add for A<B> where B: Add<Output = B> {
    |                                  ++++++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/missing-bounds.rs:21:14
+  --> $DIR/missing-bounds.rs:23:14
    |
 LL | impl<B: Add> Add for C<B> {
    |      - expected this type parameter
@@ -54,7 +54,7 @@ LL |         Self(self.0 + rhs.0)
    = note: expected type parameter `B`
              found associated type `<B as Add>::Output`
 note: tuple struct defined here
-  --> $DIR/missing-bounds.rs:15:8
+  --> $DIR/missing-bounds.rs:17:8
    |
 LL | struct C<B>(B);
    |        ^
@@ -64,7 +64,7 @@ LL | impl<B: Add<Output = B>> Add for C<B> {
    |            ++++++++++++
 
 error[E0369]: cannot add `B` to `B`
-  --> $DIR/missing-bounds.rs:31:21
+  --> $DIR/missing-bounds.rs:34:21
    |
 LL |         Self(self.0 + rhs.0)
    |              ------ ^ ----- B
@@ -77,7 +77,7 @@ LL | impl<B: std::ops::Add<Output = B>> Add for D<B> {
    |       +++++++++++++++++++++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/missing-bounds.rs:42:14
+  --> $DIR/missing-bounds.rs:46:14
    |
 LL | impl<B: Add> Add for E<B> where <B as Add>::Output = B {
    |      - expected this type parameter
@@ -90,7 +90,7 @@ LL |         Self(self.0 + rhs.0)
    = note: expected type parameter `B`
              found associated type `<B as Add>::Output`
 note: tuple struct defined here
-  --> $DIR/missing-bounds.rs:35:8
+  --> $DIR/missing-bounds.rs:39:8
    |
 LL | struct E<B>(B);
    |        ^

tests/ui/impl-trait/precise-capturing/forgot-to-capture-type.rs

@@ -6,6 +6,7 @@ fn type_param<T>() -> impl Sized + use<> {}
 trait Foo {
     fn bar() -> impl Sized + use<>;
     //~^ ERROR `impl Trait` must mention the `Self` type of the trait
+    //~| ERROR `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
 }
 
 fn main() {}

tests/ui/impl-trait/precise-capturing/forgot-to-capture-type.stderr

@@ -1,3 +1,11 @@
+error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
+  --> $DIR/forgot-to-capture-type.rs:7:30
+   |
+LL |     fn bar() -> impl Sized + use<>;
+   |                              ^^^^^
+   |
+   = note: currently, return-position `impl Trait` in traits and trait implementations capture all lifetimes in scope
+
 error: `impl Trait` must mention all type parameters in scope in `use<...>`
   --> $DIR/forgot-to-capture-type.rs:3:23
    |
@@ -18,5 +26,5 @@ LL |     fn bar() -> impl Sized + use<>;
    |
    = note: currently, all type parameters are required to be mentioned in the precise captures list
 
-error: aborting due to 2 previous errors
+error: aborting due to 3 previous errors
 

tests/ui/impl-trait/precise-capturing/redundant.normal.stderr

@@ -0,0 +1,20 @@
+warning: all possible in-scope parameters are already captured, so `use<...>` syntax is redundant
+  --> $DIR/redundant.rs:7:19
+   |
+LL | fn hello<'a>() -> impl Sized + use<'a> {}
+   |                   ^^^^^^^^^^^^^-------
+   |                                |
+   |                                help: remove the `use<...>` syntax
+   |
+   = note: `#[warn(impl_trait_redundant_captures)]` on by default
+
+warning: all possible in-scope parameters are already captured, so `use<...>` syntax is redundant
+  --> $DIR/redundant.rs:12:27
+   |
+LL |     fn inherent(&self) -> impl Sized + use<'_> {}
+   |                           ^^^^^^^^^^^^^-------
+   |                                        |
+   |                                        help: remove the `use<...>` syntax
+
+warning: 2 warnings emitted
+

tests/ui/impl-trait/precise-capturing/redundant.rpitit.stderr

@@ -0,0 +1,18 @@
+error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
+  --> $DIR/redundant.rs:18:35
+   |
+LL |     fn in_trait() -> impl Sized + use<'a, Self>;
+   |                                   ^^^^^^^^^^^^^
+   |
+   = note: currently, return-position `impl Trait` in traits and trait implementations capture all lifetimes in scope
+
+error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
+  --> $DIR/redundant.rs:23:35
+   |
+LL |     fn in_trait() -> impl Sized + use<'a> {}
+   |                                   ^^^^^^^
+   |
+   = note: currently, return-position `impl Trait` in traits and trait implementations capture all lifetimes in scope
+
+error: aborting due to 2 previous errors
+

tests/ui/impl-trait/precise-capturing/redundant.rs

@@ -1,24 +1,27 @@
 //@ compile-flags: -Zunstable-options --edition=2024
-//@ check-pass
+//@ revisions: normal rpitit
+//@[normal] check-pass
 
 #![feature(precise_capturing)]
 
 fn hello<'a>() -> impl Sized + use<'a> {}
-//~^ WARN all possible in-scope parameters are already captured
+//[normal]~^ WARN all possible in-scope parameters are already captured
 
 struct Inherent;
 impl Inherent {
     fn inherent(&self) -> impl Sized + use<'_> {}
-    //~^ WARN all possible in-scope parameters are already captured
+    //[normal]~^ WARN all possible in-scope parameters are already captured
 }
 
+#[cfg(rpitit)]
 trait Test<'a> {
     fn in_trait() -> impl Sized + use<'a, Self>;
-    //~^ WARN all possible in-scope parameters are already captured
+    //[rpitit]~^ ERROR `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
 }
+#[cfg(rpitit)]
 impl<'a> Test<'a> for () {
     fn in_trait() -> impl Sized + use<'a> {}
-    //~^ WARN all possible in-scope parameters are already captured
+    //[rpitit]~^ ERROR `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
 }
 
 fn main() {}

tests/ui/impl-trait/precise-capturing/redundant.stderr

@@ -1,36 +0,0 @@
-warning: all possible in-scope parameters are already captured, so `use<...>` syntax is redundant
-  --> $DIR/redundant.rs:6:19
-   |
-LL | fn hello<'a>() -> impl Sized + use<'a> {}
-   |                   ^^^^^^^^^^^^^-------
-   |                                |
-   |                                help: remove the `use<...>` syntax
-   |
-   = note: `#[warn(impl_trait_redundant_captures)]` on by default
-
-warning: all possible in-scope parameters are already captured, so `use<...>` syntax is redundant
-  --> $DIR/redundant.rs:11:27
-   |
-LL |     fn inherent(&self) -> impl Sized + use<'_> {}
-   |                           ^^^^^^^^^^^^^-------
-   |                                        |
-   |                                        help: remove the `use<...>` syntax
-
-warning: all possible in-scope parameters are already captured, so `use<...>` syntax is redundant
-  --> $DIR/redundant.rs:16:22
-   |
-LL |     fn in_trait() -> impl Sized + use<'a, Self>;
-   |                      ^^^^^^^^^^^^^-------------
-   |                                   |
-   |                                   help: remove the `use<...>` syntax
-
-warning: all possible in-scope parameters are already captured, so `use<...>` syntax is redundant
-  --> $DIR/redundant.rs:20:22
-   |
-LL |     fn in_trait() -> impl Sized + use<'a> {}
-   |                      ^^^^^^^^^^^^^-------
-   |                                   |
-   |                                   help: remove the `use<...>` syntax
-
-warning: 4 warnings emitted
-

tests/ui/impl-trait/precise-capturing/rpitit.rs

@@ -0,0 +1,21 @@
+//@ known-bug: unknown
+
+// RPITITs don't have variances in their GATs, so they always relate invariantly
+// and act as if they capture all their args.
+// To fix this soundly, we need to make sure that all the trait header args
+// remain captured, since they affect trait selection.
+
+#![feature(precise_capturing)]
+
+trait Foo<'a> {
+    fn hello() -> impl PartialEq + use<Self>;
+}
+
+fn test<'a, 'b, T: for<'r> Foo<'r>>() {
+    PartialEq::eq(
+        &<T as Foo<'a>>::hello(),
+        &<T as Foo<'b>>::hello(),
+    );
+}
+
+fn main() {}

tests/ui/impl-trait/precise-capturing/rpitit.stderr

@@ -0,0 +1,50 @@
+error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
+  --> $DIR/rpitit.rs:11:36
+   |
+LL |     fn hello() -> impl PartialEq + use<Self>;
+   |                                    ^^^^^^^^^
+   |
+   = note: currently, return-position `impl Trait` in traits and trait implementations capture all lifetimes in scope
+
+error: `impl Trait` captures lifetime parameter, but it is not mentioned in `use<...>` precise captures list
+  --> $DIR/rpitit.rs:11:19
+   |
+LL | trait Foo<'a> {
+   |           -- this lifetime parameter is captured
+LL |     fn hello() -> impl PartialEq + use<Self>;
+   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ lifetime captured due to being mentioned in the bounds of the `impl Trait`
+
+error: lifetime may not live long enough
+  --> $DIR/rpitit.rs:15:5
+   |
+LL |   fn test<'a, 'b, T: for<'r> Foo<'r>>() {
+   |           --  -- lifetime `'b` defined here
+   |           |
+   |           lifetime `'a` defined here
+LL | /     PartialEq::eq(
+LL | |         &<T as Foo<'a>>::hello(),
+LL | |         &<T as Foo<'b>>::hello(),
+LL | |     );
+   | |_____^ argument requires that `'a` must outlive `'b`
+   |
+   = help: consider adding the following bound: `'a: 'b`
+
+error: lifetime may not live long enough
+  --> $DIR/rpitit.rs:15:5
+   |
+LL |   fn test<'a, 'b, T: for<'r> Foo<'r>>() {
+   |           --  -- lifetime `'b` defined here
+   |           |
+   |           lifetime `'a` defined here
+LL | /     PartialEq::eq(
+LL | |         &<T as Foo<'a>>::hello(),
+LL | |         &<T as Foo<'b>>::hello(),
+LL | |     );
+   | |_____^ argument requires that `'b` must outlive `'a`
+   |
+   = help: consider adding the following bound: `'b: 'a`
+
+help: `'a` and `'b` must be the same: replace one with the other
+
+error: aborting due to 4 previous errors
+

tests/ui/impl-trait/precise-capturing/self-capture.rs

@@ -1,9 +1,8 @@
-//@ check-pass
-
 #![feature(precise_capturing)]
 
 trait Foo {
     fn bar<'a>() -> impl Sized + use<Self>;
+    //~^ ERROR `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
 }
 
 fn main() {}

tests/ui/impl-trait/precise-capturing/self-capture.stderr

@@ -0,0 +1,10 @@
+error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
+  --> $DIR/self-capture.rs:4:34
+   |
+LL |     fn bar<'a>() -> impl Sized + use<Self>;
+   |                                  ^^^^^^^^^
+   |
+   = note: currently, return-position `impl Trait` in traits and trait implementations capture all lifetimes in scope
+
+error: aborting due to 1 previous error
+

tests/ui/lint/dead-code/unused-trait-with-assoc-ty.rs

@@ -0,0 +1,11 @@
+#![deny(dead_code)]
+
+struct T1; //~ ERROR struct `T1` is never constructed
+
+trait Foo { type Unused; } //~ ERROR trait `Foo` is never used
+impl Foo for T1 { type Unused = Self; }
+
+pub trait Bar { type Used; }
+impl Bar for T1 { type Used = Self; }
+
+fn main() {}

tests/ui/lint/dead-code/unused-trait-with-assoc-ty.stderr

@@ -0,0 +1,20 @@
+error: struct `T1` is never constructed
+  --> $DIR/unused-trait-with-assoc-ty.rs:3:8
+   |
+LL | struct T1;
+   |        ^^
+   |
+note: the lint level is defined here
+  --> $DIR/unused-trait-with-assoc-ty.rs:1:9
+   |
+LL | #![deny(dead_code)]
+   |         ^^^^^^^^^
+
+error: trait `Foo` is never used
+  --> $DIR/unused-trait-with-assoc-ty.rs:5:7
+   |
+LL | trait Foo { type Unused; }
+   |       ^^^
+
+error: aborting due to 2 previous errors
+

tests/ui/pattern/issue-22546.rs

@@ -15,7 +15,7 @@ impl<T: ::std::fmt::Display> Foo<T> {
     }
 }
 
-trait Tr { //~ WARN trait `Tr` is never used
+trait Tr {
     type U;
 }
 

tests/ui/pattern/issue-22546.stderr

@@ -1,10 +0,0 @@
-warning: trait `Tr` is never used
-  --> $DIR/issue-22546.rs:18:7
-   |
-LL | trait Tr {
-   |       ^^
-   |
-   = note: `#[warn(dead_code)]` on by default
-
-warning: 1 warning emitted
-

tests/ui/regions/account-for-lifetimes-in-closure-suggestion.rs

@@ -0,0 +1,19 @@
+// #125634
+struct Thing;
+
+// Invariant in 'a, Covariant in 'b
+struct TwoThings<'a, 'b>(*mut &'a (), &'b mut ());
+
+impl Thing {
+    fn enter_scope<'a>(self, _scope: impl for<'b> FnOnce(TwoThings<'a, 'b>)) {}
+}
+
+fn foo() {
+    Thing.enter_scope(|ctx| {
+        SameLifetime(ctx); //~ ERROR lifetime may not live long enough
+    });
+}
+
+struct SameLifetime<'a>(TwoThings<'a, 'a>);
+
+fn main() {}

tests/ui/regions/account-for-lifetimes-in-closure-suggestion.stderr

@@ -0,0 +1,17 @@
+error: lifetime may not live long enough
+  --> $DIR/account-for-lifetimes-in-closure-suggestion.rs:13:22
+   |
+LL |     Thing.enter_scope(|ctx| {
+   |                        ---
+   |                        |
+   |                        has type `TwoThings<'_, '1>`
+   |                        has type `TwoThings<'2, '_>`
+LL |         SameLifetime(ctx);
+   |                      ^^^ this usage requires that `'1` must outlive `'2`
+   |
+   = note: requirement occurs because of the type `TwoThings<'_, '_>`, which makes the generic argument `'_` invariant
+   = note: the struct `TwoThings<'a, 'b>` is invariant over the parameter `'a`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+error: aborting due to 1 previous error
+

tests/ui/regions/lifetime-not-long-enough-suggestion-regression-test-124563.rs

@@ -1,5 +1,4 @@
-//@ known-bug: rust-lang/rust#124563
-
+// #124563
 use std::marker::PhantomData;
 
 pub trait Trait {}
@@ -17,11 +16,11 @@ where
     T: Trait,
 {
     type Trait = T;
-    type Bar = BarImpl<'a, 'b, T>;
+    type Bar = BarImpl<'a, 'b, T>; //~ ERROR lifetime bound not satisfied
 
     fn foo(&mut self) {
-        self.enter_scope(|ctx| {
-            BarImpl(ctx);
+        self.enter_scope(|ctx| { //~ ERROR lifetime may not live long enough
+            BarImpl(ctx); //~ ERROR lifetime may not live long enough
         });
     }
 }
@@ -44,3 +43,5 @@ where
 {
     type Foo = FooImpl<'a, 'b, T>;
 }
+
+fn main() {}

tests/ui/regions/lifetime-not-long-enough-suggestion-regression-test-124563.stderr

@@ -0,0 +1,49 @@
+error[E0478]: lifetime bound not satisfied
+  --> $DIR/lifetime-not-long-enough-suggestion-regression-test-124563.rs:19:16
+   |
+LL |     type Bar = BarImpl<'a, 'b, T>;
+   |                ^^^^^^^^^^^^^^^^^^
+   |
+note: lifetime parameter instantiated with the lifetime `'a` as defined here
+  --> $DIR/lifetime-not-long-enough-suggestion-regression-test-124563.rs:14:6
+   |
+LL | impl<'a, 'b, T> Foo for FooImpl<'a, 'b, T>
+   |      ^^
+note: but lifetime parameter must outlive the lifetime `'b` as defined here
+  --> $DIR/lifetime-not-long-enough-suggestion-regression-test-124563.rs:14:10
+   |
+LL | impl<'a, 'b, T> Foo for FooImpl<'a, 'b, T>
+   |          ^^
+
+error: lifetime may not live long enough
+  --> $DIR/lifetime-not-long-enough-suggestion-regression-test-124563.rs:23:21
+   |
+LL |         self.enter_scope(|ctx| {
+   |                           ---
+   |                           |
+   |                           has type `&'1 mut FooImpl<'_, '_, T>`
+   |                           has type `&mut FooImpl<'2, '_, T>`
+LL |             BarImpl(ctx);
+   |                     ^^^ this usage requires that `'1` must outlive `'2`
+
+error: lifetime may not live long enough
+  --> $DIR/lifetime-not-long-enough-suggestion-regression-test-124563.rs:22:9
+   |
+LL |   impl<'a, 'b, T> Foo for FooImpl<'a, 'b, T>
+   |        --  -- lifetime `'b` defined here
+   |        |
+   |        lifetime `'a` defined here
+...
+LL | /         self.enter_scope(|ctx| {
+LL | |             BarImpl(ctx);
+LL | |         });
+   | |__________^ argument requires that `'a` must outlive `'b`
+   |
+   = help: consider adding the following bound: `'a: 'b`
+   = note: requirement occurs because of a mutable reference to `FooImpl<'_, '_, T>`
+   = note: mutable references are invariant over their type parameter
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0478`.

tests/ui/regions/regions-escape-method.fixed

@@ -0,0 +1,17 @@
+// Test a method call where the parameter `B` would (illegally) be
+// inferred to a region bound in the method argument. If this program
+// were accepted, then the closure passed to `s.f` could escape its
+// argument.
+//@ run-rustfix
+
+struct S;
+
+impl S {
+    fn f<B, F>(&self, _: F) where F: FnOnce(&i32) -> B {
+    }
+}
+
+fn main() {
+    let s = S;
+    s.f(|p| *p) //~ ERROR lifetime may not live long enough
+}

tests/ui/regions/regions-escape-method.rs

@@ -2,6 +2,7 @@
 // inferred to a region bound in the method argument. If this program
 // were accepted, then the closure passed to `s.f` could escape its
 // argument.
+//@ run-rustfix
 
 struct S;
 

tests/ui/regions/regions-escape-method.stderr

@@ -1,11 +1,16 @@
 error: lifetime may not live long enough
-  --> $DIR/regions-escape-method.rs:15:13
+  --> $DIR/regions-escape-method.rs:16:13
    |
 LL |     s.f(|p| p)
    |          -- ^ returning this value requires that `'1` must outlive `'2`
    |          ||
    |          |return type of closure is &'2 i32
    |          has type `&'1 i32`
+   |
+help: dereference the return value
+   |
+LL |     s.f(|p| *p)
+   |             +
 
 error: aborting due to 1 previous error
 

tests/ui/suggestions/missing-impl-trait-block-but-not-ascii.rs

@@ -0,0 +1,13 @@
+// issue#126764
+
+struct S;
+
+trait T {
+    fn f();
+}
+impl T for S；
+//~^ ERROR: unknown start of token
+//~| ERROR: expected `{}`
+//~| ERROR: not all trait items implemented, missing: `f`
+
+fn main() {}

tests/ui/suggestions/missing-impl-trait-block-but-not-ascii.stderr

@@ -0,0 +1,31 @@
+error: unknown start of token: \u{ff1b}
+  --> $DIR/missing-impl-trait-block-but-not-ascii.rs:8:13
+   |
+LL | impl T for S；
+   |             ^^
+   |
+help: Unicode character '；' (Fullwidth Semicolon) looks like ';' (Semicolon), but it is not
+   |
+LL | impl T for S;
+   |             ~
+
+error: expected `{}`, found `;`
+  --> $DIR/missing-impl-trait-block-but-not-ascii.rs:8:13
+   |
+LL | impl T for S；
+   |             ^^
+   |
+   = help: try using `{}` instead
+
+error[E0046]: not all trait items implemented, missing: `f`
+  --> $DIR/missing-impl-trait-block-but-not-ascii.rs:8:1
+   |
+LL |     fn f();
+   |     ------- `f` from trait
+LL | }
+LL | impl T for S；
+   | ^^^^^^^^^^^^ missing `f` in implementation
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0046`.