diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug732758.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug732758.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,42 @@
+function tryItOut(code) {
+    try {
+        f = Function(code)
+    } catch (r) {}
+    v = tryRunning(f, code)
+    x = String;
+    for (e in v) {}
+}
+function tryRunning() {
+    try {
+        rv = f();
+        return rv;
+    } catch (r) {
+        x = String;
+    }
+}
+__proto__.__defineSetter__("x", function() {});
+tryItOut("/()/;\"\"()");
+tryItOut("}");
+tryItOut("");
+tryItOut("o");
+tryItOut(")");
+tryItOut("(");
+tryItOut(")");
+tryItOut("}");
+tryItOut("}");
+tryItOut(")");
+tryItOut(")");
+tryItOut("");
+tryItOut("l;function u(){/j/}");
+tryItOut("(");
+tryItOut("t");
+tryItOut("(");
+tryItOut(")");
+tryItOut("(");
+tryItOut("");
+tryItOut("{t:g}");
+tryItOut("r");
+tryItOut("p");
+tryItOut("gc()");
+tryItOut("verifybarriers()");
+tryItOut("/**/yield");