1 files changed, 10 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/entry.fixed b/src/tools/clippy/tests/ui/entry.fixed
index 71ec13f4610..abdfae2a3e1 100644
--- a/src/tools/clippy/tests/ui/entry.fixed
+++ b/src/tools/clippy/tests/ui/entry.fixed
@@ -176,4 +176,14 @@ pub fn issue_11935() {
     }
 }
 
+fn issue12489(map: &mut HashMap<u64, u64>) -> Option<()> {
+    if let std::collections::hash_map::Entry::Vacant(e) = map.entry(1) {
+        let Some(1) = Some(2) else {
+            return None;
+        };
+        e.insert(42);
+    }
+    Some(())
+}
+
 fn main() {}