R1:6edd29de43f7

Prevent Firebug from crashing in Firefox 13 / Window 7

Summary:
Simpler fix for D2572. Not entirely sure why Firebug is crashing Firefox. It appears to be callstack depth related, possibly? You can sort of reproduce this like this:

>>> var f = function(n) { n && f(n - 1); }
>>> f(10000); // Takes a few ms to run.
>>> f(40000); // Takes a few ms to run.
>>> f(50000); // Hangs Firefox.

If there are 2,000 files, we currently hit a stack depth of around 4,000 with the pass() rules, so it seems like…