diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testModuloWithNegative1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testModuloWithNegative1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+function testModuloWithNegative1() {
+    var v = 0;
+    for (var i = 0; i < 2; ++i) {
+        c = v;
+        v -= 1;
+        for (var j = 0; j < 2; ++j)
+            c %= -1;
+    }
+    return 1/c;
+}
+assertEq(testModuloWithNegative1(), -Infinity);