1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Map-iterator-already-done.js b/js/src/jit-test/tests/collections/Map-iterator-already-done.js
new file mode 100644
index 0000000000..3e3db75436
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Map-iterator-already-done.js
@@ -0,0 +1,12 @@
+let a = new Map();
+for (let i = 0; i < 1000; i++)
+  a.set(i, i);
+
+function f() {
+  let iter = a.entries();
+  while (!iter.next().done) {}
+  iter.next();
+}
+
+for (let i = 0; i < 10; i++)
+  f();