1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/non262/regress/regress-417893.js b/js/src/tests/non262/regress/regress-417893.js
new file mode 100644
index 0000000000..330858c0e6
--- /dev/null
+++ b/js/src/tests/non262/regress/regress-417893.js
@@ -0,0 +1,35 @@
+// |reftest| skip-if(!Object.prototype.toSource)
+
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 417893;
+var summary = 'Fast natives must use JS_THIS/JS_THIS_OBJECT';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  try
+  {
+    (function() { var s = function(){}.prototype.toSource; s(); })();
+  }
+  catch (e)
+  {
+    assertEq(e instanceof TypeError, true,
+             "No TypeError for Object.prototype.toSource");
+  }
+
+  reportCompare(expect, actual, summary);
+}