update suggestion ui test

src/librustc/hir/lowering.rs

@@ -2135,6 +2135,16 @@ impl<'a> LoweringContext<'a> {
         impl_trait_return_allow: bool,
         make_ret_async: Option<NodeId>,
     ) -> P<hir::FnDecl> {
+        debug!("lower_fn_decl(\
+            fn_decl: {:?}, \
+            in_band_ty_params: {:?}, \
+            impl_trait_return_allow: {}, \
+            make_ret_async: {:?})",
+            decl,
+            in_band_ty_params,
+            impl_trait_return_allow,
+            make_ret_async,
+        );
         let lt_mode = if make_ret_async.is_some() {
             // In `async fn`, argument-position elided lifetimes
             // must be transformed into fresh generic parameters so that
@@ -2427,7 +2437,7 @@ impl<'a> LoweringContext<'a> {
 
         hir::FunctionRetTy::Return(P(hir::Ty {
             kind: opaque_ty_ref,
-            span,
+            span: opaque_ty_span,
             hir_id: self.next_id(),
         }))
     }
@@ -2537,7 +2547,7 @@ impl<'a> LoweringContext<'a> {
         hir::Lifetime {
             hir_id: self.lower_node_id(id),
             span,
-            name: name,
+            name,
         }
     }
 

src/librustc/infer/error_reporting/nice_region_error/static_impl_trait.rs

@@ -53,11 +53,14 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
                         }) => name.to_string(),
                         _ => "'_".to_owned(),
                     };
-                    if let Ok(snippet) = self.tcx().sess.source_map().span_to_snippet(return_sp) {
-                        // only apply this suggestion onto non-async fnunctions
-                        if !return_ty.unwrap().1 {
+                    let fn_return_span = return_ty.unwrap().1;
+                    if let Ok(snippet) =
+                        self.tcx().sess.source_map().span_to_snippet(fn_return_span) {
+                        // only apply this suggestion onto functions with
+                        // explicit non-desugar'able return.
+                        if fn_return_span.desugaring_kind().is_none() {
                             err.span_suggestion(
-                                return_sp,
+                                fn_return_span,
                                 &format!(
                                     "you can add a constraint to the return type to make it last \
                                  less than `'static` and match {}",

src/librustc/ty/context.rs

@@ -1553,7 +1553,7 @@ impl<'tcx> TyCtxt<'tcx> {
     pub fn return_type_impl_trait(
         &self,
         scope_def_id: DefId,
-    ) -> Option<(Ty<'tcx>, bool)> {
+    ) -> Option<(Ty<'tcx>, Span)> {
         // HACK: `type_of_def_id()` will fail on these (#55796), so return `None`.
         let hir_id = self.hir().as_local_hir_id(scope_def_id).unwrap();
         match self.hir().get(hir_id) {
@@ -1573,10 +1573,9 @@ impl<'tcx> TyCtxt<'tcx> {
             ty::FnDef(_, _) => {
                 let sig = ret_ty.fn_sig(*self);
                 let output = self.erase_late_bound_regions(&sig.output());
-                let is_async_fn =
-                    hir::IsAsync::Async == self.asyncness(scope_def_id);
                 if output.is_impl_trait() {
-                    Some((output, is_async_fn))
+                    let fn_decl = self.hir().fn_decl_by_hir_id(hir_id).unwrap();
+                    Some((output, fn_decl.output.span()))
                 } else {
                     None
                 }

src/test/ui/async-await/issues/issue-62097.stderr

@@ -0,0 +1,16 @@
+error: cannot infer an appropriate lifetime
+  --> $DIR/issue-62097.rs:12:31
+   |
+LL |     pub async fn run_dummy_fn(&self) {
+   |                               ^^^^^ ...but this borrow...
+LL |         foo(|| self.bar()).await;
+   |         --- this return type evaluates to the `'static` lifetime...
+   |
+note: ...can't outlive the lifetime `'_` as defined on the method body at 12:31
+  --> $DIR/issue-62097.rs:12:31
+   |
+LL |     pub async fn run_dummy_fn(&self) {
+   |                               ^
+
+error: aborting due to previous error
+

src/test/ui/async-await/issues/issue-63388-2.stderr

@@ -20,10 +20,6 @@ note: ...can't outlive the lifetime `'_` as defined on the method body at 11:14
    |
 LL |         foo: &dyn Foo, bar: &'a dyn Foo
    |              ^
-help: you can add a constraint to the return type to make it last less than `'static` and match the lifetime `'_` as defined on the method body at 11:14
-   |
-LL |         foo + '_
-   |
 
 error: aborting due to 2 previous errors
 

src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait-async.stderr

@@ -11,10 +11,6 @@ note: ...can't outlive the lifetime `'_` as defined on the method body at 8:26
    |
 LL |     async fn f(self: Pin<&Self>) -> impl Clone { self }
    |                          ^
-help: you can add a constraint to the return type to make it last less than `'static` and match the lifetime `'_` as defined on the method body at 8:26
-   |
-LL |     async fn f(self: Pin<&Self>) -> impl Clone + '_ { self }
-   |                                     ^^^^^^^^^^^^^^^
 
 error: aborting due to previous error