1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index f3f1c7534b0..f8747386c04 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -467,6 +467,9 @@ pub enum StashKey {
     /// When an invalid lifetime e.g. `'2` should be reinterpreted
     /// as a char literal in the parser
     LifetimeIsChar,
+    /// Maybe there was a typo where a comma was forgotten before
+    /// FRU syntax
+    MaybeFruTypo,
 }
 
 fn default_track_diagnostic(_: &Diagnostic) {}