diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testIntFloor.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testIntFloor.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+function testIntFloor() {
+    var a;
+    for (var x = 0; x < 3; ++x) {
+	a = Math.floor('')
+    }
+    return a;
+}
+assertEq(testIntFloor(), 0)