[mapserver-users] Fwd: php mapscript bug when using getshape

[Steve Lime]

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From: Sylvain Pasche <sylvain_pasche@yahoo.fr>
Message-Id: <15687.60852.145762.8367@in3sun3.epfl.ch>
Date: Wed, 31 Jul 2002 16:01:24 +0200
To: mapserver-bugs@lists.gis.umn.edu
Subject: php mapscript bug when using getshape
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Hello,

I had a discussion with some developers recently, about a bug using
getshape in php, but the thread ended without response.

When running the code below, mapserver segfaults.

The problem is caused by the fact that msquerybypoint closes the layer 
upon completion. But php mapscript still has a reference on the
corresponding layer. So, when it make a getshape request with the
freed layer, as the shapefile is closed, it segfaults.

Uncommenting the following line prevents mapserver from segfaulting,
this is just to identify the problem.

line 929 in mapquery.c

//msLayerClose(lp);

Sylvain


PS: is this mail adress a mailing list, or just an alias ?

-----------------BEGIN testcase.php

dl("php_mapscript.so");

$Map =
ms_newMapObj("/home/sypasche/public_html/cartoserver/mapfiles/testcase/testcase.map");

$Map->setextent(530000.610972,76797.7871943,610002.242216,156799.418438);


$layer = $Map->getlayerbyname("cabanes");

		
$click_geo = ms_newPointObj();
$click_geo->setxy(558401.190064, 112598.517176);

$res = $layer->queryByPoint($click_geo, MS_MULTIPLE, -1);

print  "num res " .  $layer->getNumResults() . " <br />";

$cache = $layer->getResult(0);

var_dump($cache);

// here the cache contains shapeindex 2, tileindex -1

// using $num in getshape, produces:
// 2 -> segfault
// 50 -> Assertion failed, Could not set shape values: 0, 0

$num = 2;

if(1)
$shape = $layer->getShape(-1, 
                          $num);


$map_img = $Map->draw();
$url =  $map_img->saveWebImage(MS_PNG,0,0,60);


echo "<br /> <img src=\"http://localhost$url\" />";

---------------END testcase.php