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-rw-r--r--compiler/rustc_errors/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index c2af7f38d70..da74ee6391a 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -507,6 +507,7 @@ pub enum StashKey {
     CallAssocMethod,
     TraitMissingMethod,
     OpaqueHiddenTypeMismatch,
+    MaybeForgetReturn,
 }
 
 fn default_track_diagnostic(d: &mut Diagnostic, f: &mut dyn FnMut(&mut Diagnostic)) {