[QGIS-trac] [Quantum GIS] #1248: QgsGeometry.Union causes Segfault when unioning multi-polyon features

[Quantum GIS]

#1248: QgsGeometry.Union causes Segfault when unioning multi-polyon features
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   Reporter:  cfarmer                                    |              Owner:  jef          
       Type:  bug                                        |             Status:  new          
   Priority:  critical: causes crash or data corruption  |          Milestone:  Version 1.0.0
  Component:  Vectors                                    |            Version:  HEAD         
   Keywords:                                             |   Platform_version:               
   Platform:  Linux                                      |           Must_fix:  Yes          
Status_info:  0                                          |  
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 When unioning two features using QgsGeometry.Union, if one of the features
 is a multi-polygon, QGIS crashes without warning.

 Example (should combine all geometries of a single layer together through
 unioning):

 geom = QgsGeometry()
 geom2 = QgsGeometry()
 provider.getNextFeature(feat)
 geom = feat.geometry()
 while provider.getNextFeature(feat):
     geom2 = feat.geometry()
     geom = geom.Union(geom2)

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/1248>
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