diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/splice-675164.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/splice-675164.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+function NPList() {}
+NPList.prototype = new Array;
+
+var list = new NPList();
+list.push('a');
+
+var cut = list.splice(0, 1);
+
+assertEq(cut[0], 'a');
+assertEq(cut.length, 1);
+assertEq(list.length, 0);
+
+var desc = Object.getOwnPropertyDescriptor(list, "0");
+assertEq(desc, undefined);
+assertEq("0" in list, false);