[R-sig-Geo] gUnion causes segfault

[Roger Bivand]

On Thu, 2 Jun 2011, Barry Rowlingson wrote:

> I get a buffer overflow and a nice traceback that might be helpful:
>
> *** buffer overflow detected ***: /usr/lib/R/bin/exec/R terminated
> ======= Backtrace: =========
> /lib/tls/i686/cmov/libc.so.6(__fortify_fail+0x50)[0x1f3390]
> /lib/tls/i686/cmov/libc.so.6(+0xe12ca)[0x1f22ca]
> /lib/tls/i686/cmov/libc.so.6(__strcpy_chk+0x44)[0x1f1644]
> /home/rowlings/R/i486-pc-linux-gnu-library/2.12/rgeos/libs/rgeos.so(RGEOS_comment2comm+0x8f)[0xc70aff]

Thanks - this is in the code for trying to construct OGC SFS alike Polygon 
or MultiPolygon objects from R/sp Polygons objects. I'll try to see what 
it is.

Roger

> /home/rowlings/R/i486-pc-linux-gnu-library/2.12/rgeos/libs/rgeos.so(rgeos_Polygons2geospolygon+0x5c)[0xc73a8c]
> /home/rowlings/R/i486-pc-linux-gnu-library/2.12/rgeos/libs/rgeos.so(rgeos_SpatialPolygons2geospolygon+0x8b)[0xc73d7b]
> /home/rowlings/R/i486-pc-linux-gnu-library/2.12/rgeos/libs/rgeos.so(rgeos_convert_R2geos+0x548)[0xc74a58]
> /home/rowlings/R/i486-pc-linux-gnu-library/2.12/rgeos/libs/rgeos.so(rgeos_topologyfunc+0x51)[0xc7cf61]
> /home/rowlings/R/i486-pc-linux-gnu-library/2.12/rgeos/libs/rgeos.so(rgeos_unioncascaded+0x3c)[0xc7d1cc]
> [etc]
>
> My rgeos is:
>
> rgeos: (SVN revision (unknown))
> GEOS runtime version: 3.2.2-CAPI-1.6.2
> Polygon checking: TRUE
>
> Version: 0.1-6
>
> Barry
>

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no