Robert Haas <[email protected]> writes:
> On Thu, May 24, 2012 at 10:16 AM, Marko Kreen <[email protected]> wrote:
>> Following query crashes backend on 9.2:
>>
>> select substring('asd TO foo' from ' TO (([a-z0-9._]+|"([^"]+|"")+")+)');
> I spent some time trying to reduce this to the simplest case that
> still causes a crash, and came up with this:
> select substring('a' from '((a))+');
Yeah, I'm looking at it. Looks like I broke memory management somewhere
in the quantifier revisions --- it seems to be stomping the stack during
cleanup at the end of pg_regexec. Possibly a multiple-free deal?
Haven't quite found it yet.
regards, tom lane
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