diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug767665.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug767665.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+var failures = 0;
+function a() {
+	return new Array(-1);
+}
+for (var j = 0; j < 61; ++j) {
+	try {
+		a();
+		++failures;
+	} catch (e) {
+	}
+}