From 9de4f47d96aaec513b87d652b9af524ae9d7da83 Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@keybit.net>
Date: Fri, 25 May 2012 15:20:50 +0000
Subject: [PATCH] Handle exceptions from GEOSUnionCascaded() in
 LWGEOM_GEOS_buildArea

git-svn-id: http://svn.osgeo.org/postgis/trunk@9821 b70326c6-7e19-0410-871a-916f4a2858ee
---
 liblwgeom/lwgeom_geos.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/liblwgeom/lwgeom_geos.c b/liblwgeom/lwgeom_geos.c
index 88cfbce39..74fe45e36 100644
--- a/liblwgeom/lwgeom_geos.c
+++ b/liblwgeom/lwgeom_geos.c
@@ -1018,6 +1018,11 @@ LWGEOM_GEOS_buildArea(const GEOSGeometry* geom_in)
 
   /* Run a single overlay operation to dissolve shared edges */
   shp = GEOSUnionCascaded(tmp);
+  if ( ! shp )
+  {
+    GEOSGeom_destroy(tmp);
+    return 0; /* exception */
+  }
 
 #ifdef LWGEOM_PROFILE_BUILDAREA
   lwnotice("Final cleanup");
-- 
2.50.1