diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug643113.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug643113.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+function printBugNumber (num)
+{
+  print ('BUGNUMBER: ' + num);
+}
+try { test(); } catch (e) {}
+function test()
+{
+  printBugNumber(typeof BUGNUMBER == 'undefined');
+  1|| q + 48? new q(   printBugNumber,
+                eval("var EXP_1 = new MyValuelessObject('string'); var EXP_2 = new MyValuelessObject(false); EXP_1 + EXP_2") ): 1;
+}