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Re: BUG #2481: select from table's join with geometries doesn't go

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: venturato(at)faunalia(dot)it
Cc: Michael Fuhr <mike(at)fuhr(dot)org>, pgsql-bugs(at)postgresql(dot)org, strk(at)refractions(dot)net
Subject: Re: BUG #2481: select from table's join with geometries doesn't go
Date: 2006-06-16 14:33:59
Message-ID: 16787.1150468439@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugs
Emilia Venturato <venturato(at)faunalia(dot)it> writes:
> Alle 16:18, venerd 16 giugno 2006, Tom Lane ha probabilmente scritto:
>> Emilia might have found some corner case where it doesn't, though;
>> perhaps a malloc call that's not error-checked.  A stack trace from
>> the psql core dump would be useful.

> Core dump is not generated.
> How can I generate a back-trace?

You probably need to adjust your "ulimit -c" setting to get a core dump
to be generated.  Alternatively and maybe faster, just run psql under
gdb to start with:

	$ gdb /path/to/psql
	gdb> run arguments-for-psql-go-here
	... interact with psql normally, provoke crash
	gdb will report SIGSEGV and give you a prompt:
	gdb> bt
	... stack trace printed here ...
	gdb> quit
	$

If the stack trace contains only numeric addresses then it won't be any
help; in that case please recompile psql with debugging support so you
can get a useful trace.

			regards, tom lane

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