1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/stub-fold-closeiter.js b/js/src/jit-test/tests/cacheir/stub-fold-closeiter.js
new file mode 100644
index 0000000000..8e91d3737c
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/stub-fold-closeiter.js
@@ -0,0 +1,25 @@
+class Iterator {
+  val = 0;
+  next() {
+    return { value: this.val++, done: false }
+  }
+  return() { return { value: undefined, done: true }}
+}
+
+var arr = [];
+for (var i = 0; i < 10; i++) {
+  class SubIter extends Iterator {}
+  var iterable = {
+    [Symbol.iterator]() { return new SubIter(); }
+  }
+  arr.push(iterable);
+}
+
+function foo() {
+  for (var x of arr[i % arr.length]) {
+    if (x > 1) { return; }
+  }
+}
+
+with ({}) {}
+for (var i = 0; i < 100; i++) { foo(); }