diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testModuloWithNegative2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testModuloWithNegative2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+function f(v, e) {
+    for (var i = 0; i < 9; i++)
+        v %= e;
+    return v;
+}
+f(0, 1);
+assertEq(f(-2, 2), -0);