1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/gc/bug-1603330.js b/js/src/jit-test/tests/gc/bug-1603330.js
new file mode 100644
index 0000000000..888ae40a07
--- /dev/null
+++ b/js/src/jit-test/tests/gc/bug-1603330.js
@@ -0,0 +1,16 @@
+// Allocate the object in the function to prevent marked as a singleton so the
+// object won't be kept alive by IC stub.
+function allocObj() { return {}; }
+
+let wr;
+{
+  let obj = allocObj();
+  wr = new WeakRef(obj);
+}
+
+assertEq(wr.deref() !== undefined, true);
+
+clearKeptObjects();
+gc();
+
+assertEq(wr.deref(), undefined);