[geos-devel] signal 11 with GEOS rc4_svn and postgis 1.2.1

[Carl Anderson]

I ran it through XMLTester without any problems.

I got a production PostGIS and a development PostGIS server to crash 
with the SQL statement.


strk at refractions.net wrote:
>
> The attached XML can be run by GEOS's XMLTester standalone, to
> get PostGIS out of the way.
> It works fine here, with both inlines enabled or disabled.
> Do you get a segfault on your side ?
>
> --strk;
>
> On Fri, Feb 16, 2007 at 05:05:51PM -0500, Carl Anderson wrote:
> > I am getting Signal 11 faults from geos through Postgis  in the
> > following example,
> > where the geometries a and b do not really intersect.
> >
> >
> > select intersection(a, b) from
> >  (select geometry('POLYGON((0 0,0 1,1 1,1 0,0 0))') as a ,
> >     geometry('POLYGON((10 10,10 11,11 11,11 10,10 10))') as b
> >  ) as part
> >
> >
> > backtrace from Postgres 8.1.6, PostGIS 1.2.1
> >
> >
> > Reading symbols from /usr/lib/libgeos-3.0.0rc4.so...done.
> > Loaded symbols for /usr/lib/libgeos-3.0.0rc4.so
> > Reading symbols from /usr/lib/libstdc++.so.6...done.
> > Loaded symbols for /usr/lib/libstdc++.so.6
> > Reading symbols from /lib/libgcc_s.so.1...done.
> > Loaded symbols for /lib/libgcc_s.so.1
> > 0x00ecd402 in __kernel_vsyscall ()
> > (gdb) continue
> > Continuing.
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > 0x06fd4199 in geos::geom::operator<< () from 
> /usr/lib/libgeos-3.0.0rc4.so
> > (gdb) bt
> > #0  0x06fd4199 in geos::geom::operator<< () from
> > /usr/lib/libgeos-3.0.0rc4.so
> > #1  0x06fd42a7 in geos::geom::Coordinate::toString () from
> > /usr/lib/libgeos-3.0.0rc4.so
> > #2  0x06fcd98e in geos::algorithm::LineIntersector::toString () from
> > /usr/lib/libgeos-3.0.0rc4.so
> > #3  0x0708094b in geos::operation::overlay::OverlayOp::computeOverlay ()
> > from /usr/lib/libgeos-3.0.0rc4.s
> > #4  0x07080e90 in geos::operation::overlay::OverlayOp::getResultGeometry
> > () from /usr/lib/libgeos-3.0.0rc4.so
> > #5  0x07081905 in geos::operation::overlay::OverlayOp::overlayOp () from
> > /usr/lib/libgeos-3.0.0rc4.so
> > #6  0x004a8721 in geos::operation::overlay::overlayOp::operator() ()
> > from /usr/lib/libgeos_c.so.1
> > #7  0x004a8a32 in
> > geos::geom::BinaryOp<geos::operation::overlay::overlayOp> () from
> > /usr/lib/libgeos_c.so.1
> > #8  0x004a4ffc in GEOSIntersection () from /usr/lib/libgeos_c.so.1
> > #9  0x00f95398 in intersection (fcinfo=0xbf7fedb8) at 
> lwgeom_geos_c.c:882
> > #10 0x081367fc in ExecMakeFunctionResult (fcache=0x9d82ac0,
> > econtext=0x99e0a40, isNull=0xbf7ff0ff "",
> >    isDone=0x0) at execQual.c:1095
> > (gdb)
> >
> >
> > --
> > Carl Anderson
> > GIS Manager Fulton County, Georgia
> > carl.anderson at co.fulton.ga.us
> > 404.730.8026
> >
> >
> > _______________________________________________
> > geos-devel mailing list
> > geos-devel at geos.refractions.net
> > http://geos.refractions.net/mailman/listinfo/geos-devel
>
> --
>
>  ()   ASCII Ribbon Campaign
>  /\   Keep it simple!
>
> ------------------------------------------------------------------------
>
> <run>
> <precisionModel type="FLOATING"/>
> <case>
> <a>
> POLYGON((0 0,0 1,1 1,1 0,0 0))
> </a>
> <b>
> POLYGON((10 10,10 11,11 11,11 10,10 10))
> </b>
> <test>
> 	<op name="intersection">GEOMETRYCOLLECTION EMPTY</op>
> </test>
> </case>
>
> </run>
>   


-- 
Carl Anderson
GIS Manager Fulton County, Georgia
carl.anderson at co.fulton.ga.us
404.730.8026