1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/gc/bug-1643913.js b/js/src/jit-test/tests/gc/bug-1643913.js
new file mode 100644
index 0000000000..1f83a9a0a3
--- /dev/null
+++ b/js/src/jit-test/tests/gc/bug-1643913.js
@@ -0,0 +1,36 @@
+gczeal(0);
+
+for (let p of [false, true]) {
+  f(p);
+
+  // Run an incremental GC to completion.
+  startgc(1);
+  while (gcstate() !== 'NotActive') {
+    gcslice(10000, { dontStart: true });
+  }
+}
+
+function ccwToObject() {
+  return evalcx('({})', newGlobal({newCompartment: true}));
+}
+
+function ccwToRegistry() {
+  return evalcx('new FinalizationRegistry(value => {})',
+                newGlobal({newCompartment: true}));
+}
+
+function f(p) {
+  let registry = ccwToRegistry();
+  let target = ccwToObject();
+  registry.register(target, undefined);
+
+  // Add a CCW from registry to target zone or vice versa to control
+  // the order the zones are swept in.
+  if (p) {
+    registry.ptr = target;
+  } else {
+    target.ptr = registry;
+  }
+
+  gc();
+}