1 files changed, 7 insertions, 0 deletions
diff --git a/tests/source/pattern.rs b/tests/source/pattern.rs
index fc3b1455e0d..f06d03cadf2 100644
--- a/tests/source/pattern.rs
+++ b/tests/source/pattern.rs
@@ -81,3 +81,10 @@ fn slice_patterns() {
         _ => {}
     }
 }
+
+fn issue3728() {
+    let foo = |
+    (c,)
+        | c;
+    foo((1,));
+}