[mapserver-users] Expression segmentation fault

[thomas bonfort]

Frank, please supply a backtrace of the crash (`bt` in gdb once it has
halted at the segfault)

--
thomas

On Wed, Sep 4, 2013 at 2:25 PM, Frank Broniewski <brfr at metrico.lu> wrote:
> Hi,
>
> I just updated my mapserver installation to the latest version (6.2.1). I'm
> running FreeBSD 9.1 and I'm getting a segmentation fault related to
> expression usage in my mapfile. I've already compiled mapserver with debug
> symbols and I loaded the core file into gdb:
>
>> gdb /usr/local/www/apache22/cgi-bin/mapserv mapserv.core
> <snip>
> Reading symbols from /lib/libc.so.7...done.
> Loaded symbols for /lib/libc.so.7
> Reading symbols from /usr/local/lib/libintl.so.9...done.
> Loaded symbols for /usr/local/lib/libintl.so.9
> Reading symbols from /usr/lib/libsupc++.so.1...done.
> Loaded symbols for /usr/lib/libsupc++.so.1
> Reading symbols from /libexec/ld-elf.so.1...done.
> Loaded symbols for /libexec/ld-elf.so.1
> #0  0x00000008008e2520 in yylex (lvalp=0x7fffffffd250, p=0x7fffffffd3b0) at
> mapparser.y:649
> 649     mapparser.y: No such file or directory.
>         in mapparser.y
> [New Thread 809007400 (LWP 101134/mapserv)]
>
> So apparently there seems to be a file missing!? Looking at the source code
> (git), line 649 is a blank line, so I'm not sure what's missing exactly.
> I've got yacc, bison and flex installed. For testing purposes I'm using the
> mapserver cgi on the command line:
>
> /usr/local/www/apache22/cgi-bin/mapserv -nh
> "QUERY_STRING=map=/data/web/mapserver/cnra/cnra.map&mode=map&layer=boundaries"
>
> The boundaries layer:
>
> Layer
>
> #    Classitem "level"
>     Connection "host=10.0.0.2 dbname=osm user=user password=guessme"
>     Connectiontype Postgis
>     Data "geom FROM (SELECT osm_id, way AS geom, name, admin_level AS level,
> tags FROM planet_osm_polygon) AS foo USING UNIQUE osm_id USING SRID=3857"
>     Filter "tags ?& ARRAY['boundary', 'admin_level']"
>     Name "boundaries"
>     Processing "CLOSE_CONNECTION=DEFER"
>     Status on
>     Type line
>     Units meters
>
>     Metadata
>         "ows_title" "Boundary Map"
>         "ows_abstract" "Boundary map - data from OpenStreetMap, ODbl
> licensed"
>     End
>
>     Projection
>         "init=epsg:3857"
>     End
>
>     Class
>
>         Expression ("[level]" = "6")
> #        Expression "6"
>         Name "communes"
>
>         Style
>             Color 10 10 10
>             Opacity 50
>             Width 2
>         End
>
>     End
> End
>
>
> The classitem / simple expression (Expression "6") works with the mapserver
> cgi, but python mapscript throws an error: _mapscript.MapServerError:
> msEvalExpression(): General error message. Invalid item index.
>
> I've read the mapserver expressions documentation [1] and the note that says
> something about the working environment might be linked to more than one
> expression library. But my operating system skills are not high enough to
> turn this paragraph into something useful for me.
>
> So any help is greatly appreciated.
>
> Frank
>
>
> Frank BRONIEWSKI
>
> METRICO s.à r.l.
> géomètres
> technologies d'information géographique
> rue des Romains 36
> L-5433 NIEDERDONVEN
>
> tél.: +352 26 74 94 - 28
> fax.: +352 26 74 94 99
> http://www.metrico.lu
> _______________________________________________
> mapserver-users mailing list
> mapserver-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-users