1 files changed, 14 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/gc/bug1600488-1.js b/js/src/jit-test/tests/gc/bug1600488-1.js
new file mode 100644
index 0000000000..a0fb8e5ee5
--- /dev/null
+++ b/js/src/jit-test/tests/gc/bug1600488-1.js
@@ -0,0 +1,14 @@
+const token = {};
+let cleanedUpValue;
+const finalizationRegistry = new FinalizationRegistry(value => {
+  cleanedUpValue = value;
+});
+{
+    let object = {};
+    finalizationRegistry.register(object, token, token);
+    object = undefined;
+}
+gc();
+finalizationRegistry.cleanupSome();
+assertEq(cleanedUpValue, token);
+assertEq(finalizationRegistry.unregister(token), false);