bug#16895: [PATCH] grep: fix multiple bugs with bracket expressions

[Paul Eggert]

Tags: patch done

I'm afraid there are several problems in the dfa code.  I still don't 
have a handle on all of them, but here's my first patch to deal with the 
first major one I found.  Patterns like [a-[.z.]], which caused 'grep' 
to dump core until recently, still aren't being handled correctly, and 
there are several closely related bugs here.  I've taken the liberty of 
pushing the attached patch.

0001-grep-fix-multiple-bugs-with-bracket-expressions.patch
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