1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/WeakSet-moving-gc.js b/js/src/jit-test/tests/collections/WeakSet-moving-gc.js
new file mode 100644
index 0000000000..e5ae87bc75
--- /dev/null
+++ b/js/src/jit-test/tests/collections/WeakSet-moving-gc.js
@@ -0,0 +1,12 @@
+var ws = new WeakSet;
+var A = [];
+for (var i = 0; i < 1024; ++i) {
+    var value = {};
+    ws.add(value);
+    A.push(value);
+}
+gc();
+for (i = 0; i < A.length; A++) {
+    value = A[i];
+    assertEq(ws.has(value), true);
+}