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-rw-r--r--compiler/rustc_monomorphize/messages.ftl2
-rw-r--r--compiler/rustc_monomorphize/src/collector.rs1
-rw-r--r--compiler/rustc_monomorphize/src/errors.rs1
3 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_monomorphize/messages.ftl b/compiler/rustc_monomorphize/messages.ftl
index aae2d79c161..6b6653e7de0 100644
--- a/compiler/rustc_monomorphize/messages.ftl
+++ b/compiler/rustc_monomorphize/messages.ftl
@@ -48,7 +48,7 @@ monomorphize_large_assignments =
     .note = The current maximum size is {$limit}, but it can be customized with the move_size_limit attribute: `#![move_size_limit = "..."]`
 
 monomorphize_no_optimized_mir =
-    missing optimized MIR for an item in the crate `{$crate_name}`
+    missing optimized MIR for `{$instance}` in the crate `{$crate_name}`
     .note = missing optimized MIR for this item (was the crate `{$crate_name}` compiled with `--emit=metadata`?)
 
 monomorphize_recursion_limit =
diff --git a/compiler/rustc_monomorphize/src/collector.rs b/compiler/rustc_monomorphize/src/collector.rs
index 2a1b20ba48b..6e676ac6b8d 100644
--- a/compiler/rustc_monomorphize/src/collector.rs
+++ b/compiler/rustc_monomorphize/src/collector.rs
@@ -989,6 +989,7 @@ fn should_codegen_locally<'tcx>(tcx: TyCtxt<'tcx>, instance: Instance<'tcx>) ->
         tcx.dcx().emit_fatal(NoOptimizedMir {
             span: tcx.def_span(def_id),
             crate_name: tcx.crate_name(def_id.krate),
+            instance: instance.to_string(),
         });
     }
 
diff --git a/compiler/rustc_monomorphize/src/errors.rs b/compiler/rustc_monomorphize/src/errors.rs
index dffa372279f..adfe096f0cd 100644
--- a/compiler/rustc_monomorphize/src/errors.rs
+++ b/compiler/rustc_monomorphize/src/errors.rs
@@ -24,6 +24,7 @@ pub(crate) struct NoOptimizedMir {
     #[note]
     pub span: Span,
     pub crate_name: Symbol,
+    pub instance: String,
 }
 
 #[derive(LintDiagnostic)]