[geos-devel] Bug in GEOS not in JTS

[strk]

On Fri, Apr 23, 2004 at 01:01:27AM -0400, Carl Anderson wrote:
> 
> the following snip (for PostGIS) always causes a SIGABRT.  I am sure  
> that it is in GEOS.
> 
> select buffer(shape,0) from
> (
> select 'MULTIPOLYGON(((2170000 1350000,
> 2170000 1350176.60928587,2170055.96366235 1350000,2170000 1350000)))':: 
> geometry as shape ) as a
> ;
> 
> actually any shape that is the left 1/2 of a north up oriented  
> rectangle seems to cause the SIGABRT.  the error can be triggered by  
> buffer(), difference(), intersection(), and symdifference().
> 
> buffer(shape,0.00001) does not SIGABRT in the above example.
> 
> I tested this and several similar shapes that bomb in PostGIS and they  
> validate correct in JTS/JUMP.  Even the buffer(0) fcn works in JUMP.
> 
> does anyone have a working version of doc/example.cpp against CVS
> that I can use to track this down?
> 
> C.

If you comment line 271:
	geoms->push_back(create_simple_collection(geoms));
doc/example.cpp will run with some memory leaks and incorrect
results, but without memory faults.

--strk;

> 
> 
> 
> Carl Anderson.
> 
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