diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug754242.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug754242.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+var g1 = newGlobal();
+schedulegc(g1);
+gcslice(0);
+function testEq(b) {
+    var a = deserialize(serialize(b));
+}
+testEq(Array(1024).join(Array(1024).join((false))));