diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testWeirdGetterInvocation.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testWeirdGetterInvocation.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+function getArgs() { return arguments; }
+var a1 = getArgs(1);
+var a2 = getArgs(1);
+a1.__proto__ = a2;
+delete a1[0];
+a1[0];