diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug696748.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug696748.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+try {
+this.watch("b", "".substring);
+} catch(exc1) {}
+eval("\
+var URI = '';\
+test();\
+function test() {\
+  URI += '<zcti application=\"xxxx_demo\">';\
+  URI += '<pstn_data>';\
+  URI += '<dnis>877-485-xxxx</dnis>';\
+  URI += '</pstn_data>';\
+  URI >>=  '<keyvalue key=\"name\" value=\"xxx\"/>';\
+  URI += '<keyvalue key=\"phone\" value=\"6509309000\"/>';\
+}\
+test();\
+");