glibc error in queryByPoint call

[Lowell Filak]

The following message was sent by Aaron Craig <mercutio at POBOX.COM> on
Thu, 14 Apr 2005 11:45:03 +0200.

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Here's some code:
>
> #!/usr/bin/perl
>
> use warnings;
> use strict;
>
> use mapscript;
>
> $| = 1;
>
> my $map = new
>
mapscript::mapObj("/home/aaron/dev/OpenPortal/app/PortalData/confartigianato/Tag/MapServer/Sardegna.map")
> ~  || die("Couldn't make a mapscript::mapObj: "._GetMapscriptError());
> my $lyr = $map->getLayerByName("musei")
> ~  || die("Can't get layer: "._GetMapscriptError());
> my $pnt = mapscript::pointObj->new();
>
> # map extent as defined in Sardegna.map: 1426638 4301755 1570229 4573136
> $pnt->{x} = 1513869.5325;
> $pnt->{y} = 4517136.74603175;
> $lyr->{template} = "DummyTemplateOrQueriesWontWork"
> ~  if(!$lyr->{template});
>
> my $rst = $lyr->queryByPoint($map, $pnt, $mapscript::MS_SINGLE, 10);
>
> sub _GetMapscriptError
>         {
>         my $sReturn = "\n================================\n";
>         my $err = mapscript::errorObj->new();
>         while($err && $err->{code} != $mapscript::MS_NOERR)
>                 {
>                 $sReturn .= "\tError in '$err->{routine}': code
$err->{code} (see
> documentation for error code meanings.)\n";
>                 $sReturn .= "\tError message: $err->{message}\n";
>                 $err = $err->next();
>                 }
>
>         return "$sReturn\n================================\n";
>         }
>
> =pod
> Mapfile
>
> MAP                                     # [minx] [miny] [maxx] [maxy]
> ~  EXTENT                               1426638 4301755 1570229 4573136
>         STATUS                          ON
>         SIZE                                    400 756
>         IMAGETYPE               PNG
>         UNITS                           METERS
>
>         SYMBOLSET     "../../../Common/MapServer/Symbols/default.sym"
>         FONTSET       "../../../Common/MapServer/fonts.list"
>
>         DEBUG                                   ON
>
>         WEB
>                 TEMPLATE  'index.html'
>                 HEADER          'Templates/header.html'
>                 FOOTER          'Templates/footer.html'
>                 IMAGEPATH
'var/www/OpenPortal/htdocs/confartigianato/Images/'
>                 IMAGEURL  '/'
>                 LOG     '/var/www/OpenPortal'
>         END
>
> # Layers for displaying clicks
>
>         LAYER
>                 NAME "musei"
>                 TYPE POINT
>                 STATUS OFF
>
>                 CONNECTION 'user=tsc2 password=tsc2 dbname=geo_sardegna'
>                 CONNECTIONTYPE POSTGIS
>                 DATA 'the_point from musei'
>
>                 CLASS
>                         NAME "musei"
>                         STYLE
>                                 SYMBOL
> "/var/www/OpenPortal/htdocs/confartigianato/Images/icona_small.gif"
>                                 SIZE  10
>                                 COLOR 0 0 0
>                         END
>                         LABEL
>                                 TYPE BITMAP
>                                 SIZE TINY
>                                 COLOR 0 0 0
>                                 POSITION AUTO
>                                 PARTIALS FALSE
>                                 BUFFER 1
>                         END
>                 END
>         END
>
>
> END
>
> =cut
>
> Here's the error message:
>
> [aaron at Zaphod Utilities]$ ./TestMapServerQuery.pl
> *** glibc detected *** double free or corruption (!prev): 0x083654c0 ***
> Aborted
>
>
> Any ideas?  I've tried Google but come up with nothing helpful.
>
> Thanks!
>
> - --

Aaron,

I don't have direct experience with this, but can you do something like:
dbg perl core
> bt
and obtain some more information?

Lowell