Re: \x output blowing up - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: \x output blowing up
Date
Msg-id 200509242318.j8ONIGh06226@candle.pha.pa.us
Whole thread Raw
In response to Re: \x output blowing up  (Martijn van Oosterhout <kleptog@svana.org>)
Responses Re: \x output blowing up
List pgsql-hackers
Well, it seems we are going to have to fix it somehow for 8.1.  It is
not crashing here so I can't work up a patch.  Can you submit a minimal
fix for 8.1?  Thanks.

---------------------------------------------------------------------------

Martijn van Oosterhout wrote:
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> On Sat, Sep 24, 2005 at 11:45:08PM +0200, Martijn van Oosterhout wrote:
> > Hi,
> > 
> > On CVS tip, whenever I do \x output, it dies with an internal error in
> > glibc on free. If you run it under valgrind, it complains about these
> > lines of code:
> 
> <snip>
> 
> Ok, I worked out the direct cause, pg_wcswidth only returns the length
> upto the first newline and the line it breaks on is the multiline
> definition in "_pg_expandarray".
> 
> The quick fix should be to only allocate memory if it's going to call
> format_numeric_locale(), since then you know it's a number. It makes
> the code slightly more convoluated but it should be slightly more
> efficient.
> 
> I actually have a working psql that handles and displays newlines
> properly, but it's too late for 8.1. It fixes all these issues
> properly.
> 
> Have a nice day,
> -- 
> Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> > Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> > tool for doing 5% of the work and then sitting around waiting for someone
> > else to do the other 95% so you can sue them.
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--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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