exception for resolution <= 0 in OctreePointCloud c'tor

Used to trigger a C assert/abort in PCL 1.7.1.

Author: larsmans

pcl/_pcl.pyx

@@ -571,6 +571,8 @@ cdef class OctreePointCloud:
         """
         Constructs octree pointcloud with given resolution at lowest octree level
         """ 
+        if resolution <= 0.:
+            raise ValueError("Expected resolution > 0., got %r" % resolution)
         self.me = new cpp.OctreePointCloud_t(resolution)
 
     def __dealloc__(self):

tests/test.py

@@ -326,6 +326,9 @@ def setUp(self):
         self.t.define_bounding_box()
         self.t.add_points_from_input_cloud()
 
+    def testConstructor(self):
+        self.assertRaises(ValueError, pcl.OctreePointCloudSearch, 0.)
+
     def testRadiusSearch(self):
         good_point = (0.035296999, -0.074322999, 1.2074)
         rs = self.t.radius_search(good_point, 0.5, 1)