diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug720675.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug720675.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+// |jit-test| allow-oom;
+
+gcparam("maxBytes", gcparam("gcBytes") + 4*1024);
+arr = [1e0, 5e1, 9e19, 0.1e20, 1.3e20, 1e20, 9e20, 9.99e20, 
+    0.1e21, 1e21, 1e21+65537, 1e21+65536, 1e21-65536, 1]; 
+for (var i = 0; i < 4000; i++) {
+    arr.push(1e19 + i*1e19);
+}
+for (var i in arr) {}