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-rw-r--r--crates/hir/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/crates/hir/src/lib.rs b/crates/hir/src/lib.rs
index c75ceed9e3a..a26d8e9ebf9 100644
--- a/crates/hir/src/lib.rs
+++ b/crates/hir/src/lib.rs
@@ -649,6 +649,7 @@ fn emit_def_diagnostic(db: &dyn HirDatabase, acc: &mut Vec<AnyDiagnostic>, diag:
                             })
                             .group_by(|t| t.kind() == T![,])
                             .into_iter()
+                            .filter(|&(comma, _)| !comma)
                             .nth(*derive_index as usize)
                             .and_then(|(_, mut g)| g.find(|t| t.kind() == T![ident]))
                     })();