diff -r 000000000000 -r 6474c204b198 js/src/gdb/tests/test-JSString-null.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/gdb/tests/test-JSString-null.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+gdb.execute('set print address on')
+
+run_fragment('JSString.null')
+
+assert_pretty('null', '0x0')
+assert_pretty('nullRaw', '0x0')