diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug729797.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug729797.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+// |jit-test| error:InternalError
+
+// Binary: cache/js-dbg-64-5a04fd69aa09-linux
+// Flags: --ion-eager
+//
+
+var patterns = new Array();
+patterns[0] = '';
+test();
+function test() {
+  for (i in patterns) {
+    s = patterns[i];
+    status =(test)(s);
+  }
+}