1 files changed, 17 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/optimize-get-iterator-2.js b/js/src/jit-test/tests/cacheir/optimize-get-iterator-2.js
new file mode 100644
index 0000000000..83c568dac0
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/optimize-get-iterator-2.js
@@ -0,0 +1,17 @@
+(() => {
+  let returnCalled = false;
+
+  function foo() {
+    ({}).__proto__.return = () => {
+      returnCalled = true;
+      return { value: 3, done: true };
+    };
+    return 2;
+  }
+
+  assertEq(returnCalled, false);
+  let [a,[b=foo()]] = [1,[],3];
+  assertEq(returnCalled, true);
+  assertEq(a, 1);
+  assertEq(b, 2);
+})();