1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/__proto__-not-prototype-mutation-ion.js b/js/src/jit-test/tests/basic/__proto__-not-prototype-mutation-ion.js
new file mode 100644
index 0000000000..4a7b0bd37b
--- /dev/null
+++ b/js/src/jit-test/tests/basic/__proto__-not-prototype-mutation-ion.js
@@ -0,0 +1,12 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+function f()
+{
+  return { *__proto__() {}, __proto__: null };
+}
+
+for (var i = 0; i < 2e3; i++)
+  f();