1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Map-Set-moving-gc.js b/js/src/jit-test/tests/collections/Map-Set-moving-gc.js
new file mode 100644
index 000000000..e603756dc
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Map-Set-moving-gc.js
@@ -0,0 +1,16 @@
+var m = new Map;
+var s = new Set;
+
+var A = [];
+for (var i = 0; i < 1024; ++i) {
+    var key = {i:i};
+    m.set(key, i);
+    s.add(key);
+    A.push(key);
+}
+gc();
+for (var i in A) {
+    var key = A[i];
+    assertEq(m.has(key), true);
+    assertEq(s.has(key), true);
+}