title: Python gdal stopped working when using ogr Within, Contains or other
body: <p><strong>Update:</strong> By further ivestigation I found out it must be caused by somehow corrupted geometry. But even if I run:</p>
  
  <pre><code>if drillhole[1].IsValid():
  </code></pre>
  
  <p>It is causing the crash. So not sure how to check it.</p>
  
  <p>I am trying to test if lines are within polygons. Using shapely it works for me very well except of speed - I have ten thousands of lines and the same for polygons. I just wanted to test if ogr can do this faster but no luck to make it work.</p>
  
  <pre><code>import ogr
  #Load cells as polygons with slight buffer
  data_source = ogr.Open(file_path_cells)
  source_layer = data_source.GetLayer()
  source_layer.ResetReading()
  cells = []
  for source_feature in source_layer:
    feature_id = source_feature.GetFieldAsInteger(0)
    feature_geometry = source_feature.geometry()
    feature_geometry = feature_geometry.Buffer(0.1, quadsecs = 3)
    cells.append((feature_id,feature_geometry))
  
  #Load drillholes as lines wihtin cells
  data_source = ogr.Open(file_path_drillholes)
  source_layer = data_source.GetLayer()
  source_layer.ResetReading()
  drillholes = []
  for source_feature in source_layer:
    feature_elev = source_feature.GetFieldAsInteger("elev")
    feature_geometry = source_feature.geometry()
    drillholes.append((feature_elev,feature_geometry))  
  for cell in cells:
    for drillhole in drillholes:
      if cell[1].Contains(drillhole[1]):
        print("yes")
      else:
        print("no")
  </code></pre>
  
  <p>Any idea what can be wrong with the line?:</p>
  
  <pre><code>if cell[1].Contains(drillhole[1]):
  </code></pre>
  
  <p>On both my Windows 7 machines I allways get python.exe stopped working...
  Problem signature:</p>
  
  <pre><code>  Problem Event Name:   APPCRASH
    Application Name: python.exe
    Application Version:  0.0.0.0
    Application Timestamp:    5193f3af
    Fault Module Name:    gdal111.dll
    Fault Module Version: 1.11.2.0
    Fault Module Timestamp:   54e65215
    Exception Code:   c0000005
    Exception Offset: 00000000005e5fb3
    OS Version:   6.1.7601.2.1.0.768.3
  </code></pre>
  
  <p>Or is there some other faster way or way how to improve the speed of this using shapely?</p>