diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug984766.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug984766.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+
+for (var i = 0; i < 10; i++) {
+  x = ArrayBuffer(4)
+  x.f = (function() {})
+  Uint16Array(x).set(JSON.parse)
+  gcslice()
+}