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Re: [BUGS] BUG #14722: Segfault in tuplesort_heap_siftup, 32 bit overflow - Mailing list pgsql-bugs

From Peter Geoghegan
Subject Re: [BUGS] BUG #14722: Segfault in tuplesort_heap_siftup, 32 bit overflow
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Msg-id CAH2-WzmhsMPfONa2fuWppsPtDuNJMDw7yO6M79RJG1bxKx6MgQ@mail.gmail.com
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In response to Re: [BUGS] BUG #14722: Segfault in tuplesort_heap_siftup, 32 bitoverflow  (Heikki Linnakangas <hlinnaka@iki.fi>)
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On Wed, Jul 12, 2017 at 10:42 AM, Heikki Linnakangas <hlinnaka@iki.fi> wrote:
>> FWIW, memtupcount is allowed to go negative.
>
>
> Huh, say what?

Well, there are defenses against that case, both in assertions and in
code like tuplesort_heap_delete_top(). In that sense, it's allowed to
go negative.

-- 
Peter Geoghegan


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