diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug646001.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug646001.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+function jit(on)
+{
+  if (on && !options().match(/tracejit/)) { }
+}
+try { test(); } catch (e) {}
+function test( 
+ ) 
+{
+  for (var j=0;j<5;++j) { switch(1.1) { case 2: case NaN: } }
+  jit(false);
+  reportCompare('xxxxxxx'.test(new j('(x+)(x*)')));
+}