1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/gc/bug-1287399.js b/js/src/jit-test/tests/gc/bug-1287399.js
new file mode 100644
index 000000000..edaf0901b
--- /dev/null
+++ b/js/src/jit-test/tests/gc/bug-1287399.js
@@ -0,0 +1,12 @@
+if (typeof gczeal != "function" || helperThreadCount() === 0)
+	quit(0);
+
+var lfGlobal = newGlobal();
+gczeal(4);
+for (lfLocal in this) {}
+lfGlobal.offThreadCompileScript(`
+  var desc = {
+    value: 'bar',
+    value: false,
+  };
+`);