diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug901391.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug901391.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,4 @@
+function testPartition() {
+  if( "null" || new testPartition()) {}
+}
+testPartition();