jquery/sizzle — Issue #93: Selectors with unterminated tokens cause some browsers to hang
Author: hwiechers
Created: 2012-01-31 08:48:08+00:00
State: open

This selector `input[id=01234567890123456789012345678901234567890123456789` (note that there is no closing `]`) causes IE 9 to hang.

I think this is because the regex used suffers from [catastrophic backtracking](http://www.regular-expressions.info/catastrophic.html) when a match can't be found.

I tested the above using jQuery 1.7. I'm not sure what version of sizzle that applies to.