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To: Johann Spies <jspies@sun.ac.za>
cc: pgsql-admin@postgresql.org
Subject: Re: ERROR: invalid memory alloc request size 
In-reply-to: <20070517132033.GA9482@sun.ac.za> 
References: <20070514131318.GA26537@sun.ac.za>
 <11217.1179153258@sss.pgh.pa.us>
	<20070515105042.GA8121@burger.sun.ac.za>
	<5221.1179337804@sss.pgh.pa.us> <20070517132033.GA9482@sun.ac.za>
Comments: In-reply-to Johann Spies <jspies@sun.ac.za>
	message dated "Thu, 17 May 2007 15:20:33 +0200"
Date: Thu, 17 May 2007 10:40:04 -0400
Message-ID: <25608.1179412804@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
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Johann Spies <jspies@sun.ac.za> writes:
> Breakpoint 1, 0x0827eef6 in errfinish ()
> (gdb) bt
> #0  0x0827eef6 in errfinish ()
> #1  0x0828039c in elog_finish ()
> #2  0x082993b3 in MemoryContextAlloc ()
> #3  0x0828d437 in pg_mb2wchar ()
> #4  0x0811c288 in CreateCopyDestReceiver ()
> #5  0x0811ea43 in DoCopy ()
> #6  0x081f9d00 in ProcessUtility ()
> #7  0x081f6ed9 in PostgresMain ()
> #8  0x081f7cac in FreeQueryDesc ()
> #9  0x081f84d9 in PortalRun ()
> #10 0x081f3b51 in pg_parse_query ()
> #11 0x081f5296 in PostgresMain ()
> #12 0x081c8a1f in ClosePostmasterPorts ()
> #13 0x081c9924 in PostmasterMain ()
> #14 0x081823b5 in main ()

Hmmm ... this is interesting, but unfortunately backtraces from
non-debug builds are often not very trustworthy, and that seems to have
happened here.  CreateCopyDestReceiver doesn't call pg_mb2wchar, and
pg_mb2wchar doesn't call MemoryContextAlloc, so we're being lied to
right at the spot where we might've hoped to learn something.

Could you please rebuild the executables with --enable-debug and try
again?

			regards, tom lane