michael@0: try {
michael@0:     // On X64 this was crashing rather than causing a "too much recursion" exception.
michael@0:     x = /x/;
michael@0:     (function f() {
michael@0:         x.r = x;
michael@0:         return f()
michael@0:     })();
michael@0: } catch (e) {}
michael@0: