diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug621816.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug621816.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,4 @@
+// Binary: cache/js-dbg-32-250bf984b8bc-linux
+// Flags: -j
+//
+for (let j=0; j<9; ++j) { var a = new Int8Array(); a[0] = 5; a[0]; }