Auto merge of #129365 - matthiaskrgr:rollup-ebwx6ya, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #127279 (use old ctx if has same expand environment during decode span)
 - #127945 (Implement `debug_more_non_exhaustive`)
 - #128941 ( Improve diagnostic-related lints: `untranslatable_diagnostic` & `diagnostic_outside_of_impl`)
 - #129070 (Point at explicit `'static` obligations on a trait)
 - #129187 (bootstrap: fix clean's remove_dir_all implementation)
 - #129231 (improve submodule updates)
 - #129264 (Update `library/Cargo.toml` in weekly job)
 - #129284 (rustdoc: animate the `:target` highlight)
 - #129302 (compiletest: use `std::fs::remove_dir_all` now that it is available)

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

3 files changed, 26 insertions, 6 deletions

diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/placeholder_relation.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/placeholder_relation.rs
index 9c772f42cca..f2a7da707b8 100644
--- a/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/placeholder_relation.rs
+++ b/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/placeholder_relation.rs
@@ -11,7 +11,7 @@ impl<'tcx> NiceRegionError<'_, 'tcx> {
     pub(super) fn try_report_placeholder_relation(&self) -> Option<Diag<'tcx>> {
         match &self.error {
             Some(RegionResolutionError::ConcreteFailure(
-                SubregionOrigin::RelateRegionParamBound(span),
+                SubregionOrigin::RelateRegionParamBound(span, _),
                 Region(Interned(
                     RePlaceholder(ty::Placeholder {
                         bound: ty::BoundRegion { kind: sub_name, .. },
diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/note.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/note.rs
index 04e1be22a4d..600da730845 100644
--- a/compiler/rustc_trait_selection/src/error_reporting/infer/note.rs
+++ b/compiler/rustc_trait_selection/src/error_reporting/infer/note.rs
@@ -52,7 +52,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
                         .add_to_diag(err);
                 }
             }
-            infer::RelateRegionParamBound(span) => {
+            infer::RelateRegionParamBound(span, _) => {
                 RegionOriginNote::Plain { span, msg: fluent::infer_relate_region_param_bound }
                     .add_to_diag(err);
             }
@@ -199,7 +199,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
                     note,
                 })
             }
-            infer::RelateRegionParamBound(span) => {
+            infer::RelateRegionParamBound(span, _) => {
                 let param_instantiated = note_and_explain::RegionExplanation::new(
                     self.tcx,
                     generic_param_scope,
diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/region.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/region.rs
index 877a8a23d7f..765237557d9 100644
--- a/compiler/rustc_trait_selection/src/error_reporting/infer/region.rs
+++ b/compiler/rustc_trait_selection/src/error_reporting/infer/region.rs
@@ -257,7 +257,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
                     .add_to_diag(err);
                 }
             }
-            infer::RelateRegionParamBound(span) => {
+            infer::RelateRegionParamBound(span, _) => {
                 RegionOriginNote::Plain {
                     span,
                     msg: fluent::trait_selection_relate_region_param_bound,
@@ -410,7 +410,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
                     note,
                 })
             }
-            infer::RelateRegionParamBound(span) => {
+            infer::RelateRegionParamBound(span, ty) => {
                 let param_instantiated = note_and_explain::RegionExplanation::new(
                     self.tcx,
                     generic_param_scope,
@@ -419,11 +419,31 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
                     note_and_explain::PrefixKind::LfParamInstantiatedWith,
                     note_and_explain::SuffixKind::Empty,
                 );
+                let mut alt_span = None;
+                if let Some(ty) = ty
+                    && sub.is_static()
+                    && let ty::Dynamic(preds, _, ty::DynKind::Dyn) = ty.kind()
+                    && let Some(def_id) = preds.principal_def_id()
+                {
+                    for (clause, span) in
+                        self.tcx.predicates_of(def_id).instantiate_identity(self.tcx)
+                    {
+                        if let ty::ClauseKind::TypeOutlives(ty::OutlivesPredicate(a, b)) =
+                            clause.kind().skip_binder()
+                            && let ty::Param(param) = a.kind()
+                            && param.name == kw::SelfUpper
+                            && b.is_static()
+                        {
+                            // Point at explicit `'static` bound on the trait (`trait T: 'static`).
+                            alt_span = Some(span);
+                        }
+                    }
+                }
                 let param_must_outlive = note_and_explain::RegionExplanation::new(
                     self.tcx,
                     generic_param_scope,
                     sub,
-                    None,
+                    alt_span,
                     note_and_explain::PrefixKind::LfParamMustOutlive,
                     note_and_explain::SuffixKind::Empty,
                 );