diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug755832.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug755832.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+var x;
+function f(o) {
+    o.prop = x = 3;
+}
+f({});
+f(1);