1 files changed, 23 insertions, 6 deletions
diff --git a/compiler/rustc_resolve/src/late/diagnostics.rs b/compiler/rustc_resolve/src/late/diagnostics.rs
index 9213652e35f..cb39eb5416b 100644
--- a/compiler/rustc_resolve/src/late/diagnostics.rs
+++ b/compiler/rustc_resolve/src/late/diagnostics.rs
@@ -13,7 +13,7 @@ use rustc_ast::{
 };
 use rustc_ast_lowering::ResolverAstLowering;
 use rustc_ast_pretty::pprust::path_segment_to_string;
-use rustc_data_structures::fx::FxHashSet;
+use rustc_data_structures::fx::{FxHashSet, FxIndexSet};
 use rustc_errors::{
     pluralize, struct_span_err, Applicability, Diagnostic, DiagnosticBuilder, ErrorGuaranteed,
     MultiSpan,
@@ -21,7 +21,7 @@ use rustc_errors::{
 use rustc_hir as hir;
 use rustc_hir::def::Namespace::{self, *};
 use rustc_hir::def::{self, CtorKind, CtorOf, DefKind};
-use rustc_hir::def_id::{DefId, CRATE_DEF_ID, LOCAL_CRATE};
+use rustc_hir::def_id::{DefId, LocalDefId, CRATE_DEF_ID, LOCAL_CRATE};
 use rustc_hir::PrimTy;
 use rustc_session::lint;
 use rustc_session::parse::feature_err;
@@ -2082,7 +2082,7 @@ impl<'tcx> LifetimeContext<'_, 'tcx> {
 
     /// Returns whether to add `'static` lifetime to the suggested lifetime list.
     pub(crate) fn report_elision_failure(
-        &mut self,
+        &self,
         diag: &mut Diagnostic,
         params: &[ElisionFailureInfo],
     ) -> bool {
@@ -2187,10 +2187,27 @@ impl<'tcx> LifetimeContext<'_, 'tcx> {
         &self,
         err: &mut Diagnostic,
         mut spans_with_counts: Vec<(Span, usize)>,
-        lifetime_names: &FxHashSet<Symbol>,
-        lifetime_spans: Vec<Span>,
-        params: &[ElisionFailureInfo],
+        in_scope_lifetimes: FxIndexSet<LocalDefId>,
+        params: Option<&[ElisionFailureInfo]>,
     ) {
+        let (mut lifetime_names, lifetime_spans): (FxHashSet<_>, Vec<_>) = in_scope_lifetimes
+            .iter()
+            .filter_map(|def_id| {
+                let name = self.tcx.item_name(def_id.to_def_id());
+                let span = self.tcx.def_ident_span(def_id.to_def_id())?;
+                Some((name, span))
+            })
+            .filter(|&(n, _)| n != kw::UnderscoreLifetime)
+            .unzip();
+
+        if let Some(params) = params {
+            // If there's no lifetime available, suggest `'static`.
+            if self.report_elision_failure(err, params) && lifetime_names.is_empty() {
+                lifetime_names.insert(kw::StaticLifetime);
+            }
+        }
+        let params = params.unwrap_or(&[]);
+
         let snippets: Vec<Option<String>> = spans_with_counts
             .iter()
             .map(|(span, _)| self.tcx.sess.source_map().span_to_snippet(*span).ok())