1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/proxy/function-toString.js b/js/src/jit-test/tests/proxy/function-toString.js
new file mode 100644
index 000000000..cedcf552a
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/function-toString.js
@@ -0,0 +1,10 @@
+load(libdir + 'asserts.js');
+
+// Function.prototype.toString doesn't accept ES6 proxies.
+
+var proxy = new Proxy(function() {}, {});
+assertThrowsInstanceOf(() => Function.prototype.toString.call(proxy), TypeError);
+var o = Proxy.revocable(function() {}, {});
+assertThrowsInstanceOf(() => Function.prototype.toString.call(o.proxy), TypeError);
+o.revoke();
+assertThrowsInstanceOf(() => Function.prototype.toString.call(o.proxy), TypeError);