[processing] Throw exception when combining clip geometry fails in cl…

…ip alg
qgis · Apr 3, 2018 · a93daf1 · a93daf1
1 parent b18aaae
commit a93daf1
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/analysis/processing/qgsalgorithmclip.cpp b/src/analysis/processing/qgsalgorithmclip.cpp
@@ -105,6 +105,10 @@ QVariantMap QgsClipAlgorithm::processAlgorithm( const QVariantMap &parameters, Q
   if ( clipGeoms.length() > 1 )
   {
     combinedClipGeom = QgsGeometry::unaryUnion( clipGeoms );
+    if ( combinedClipGeom.isEmpty() )
+    {
+      throw QgsProcessingException( QObject::tr( "Could not create the combined clip geometry: %1" ).arg( combinedClipGeom.lastError() ) );
+    }
     singleClipFeature = false;
   }
   else