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

[strk at refractions.net]

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

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-------------- next part --------------
<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>