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Dear maintainer

Plugin: QGis geoalgorithms - Vector geometry tools - ConcaveHull
Issue: GUI works completly fine, using the python console to achieve the same end throws an error.

Input code and error message see below.

Thank you a lot,
Madlene

1. ----
   1. Input into QGIS python console
      from qgis.core import *
      import qgis.utils
      import processing
      layer = QgsVectorLayer("/path/to/pointshape.shp", "pointshape", "ogr")
      layer.isValid()
      processing.runalg("qgis:concavehull","/path/to/pointshape.shp",0.1,False,False,"/path/to/resultConcave.shp")
2. -> this syntax corresponds to the log (History and Log/Algorithm) executed if I use the GUI

1. Output on console {u'/tmp/processing/acd8509206cc4028b505fc3f27fa9fc9/OUTPUT.shp': <qgis._core.QgsVectorLayer object at 0x7f3cf3f39df8>, u'/path/to/pointshape.shp': <qgis._core.QgsVectorLayer object at 0x7f3cf3f39c30>} {u'/tmp/processing/acd8509206cc4028b505fc3f27fa9fc9/OUTPUT.shp': <qgis._core.QgsVectorLayer object at 0x7f3cf3f39df8>, u'/path/to/pointshape.shp': <qgis._core.QgsVectorLayer object at 0x7f3cf3f39c30>} {u'/tmp/processing/acd8509206cc4028b505fc3f27fa9fc9/OUTPUT.shp': <qgis._core.QgsVectorLayer object at 0x7f3cf3f39df8>, u'/path/to/pointshape.shp': <qgis._core.QgsVectorLayer object at 0x7f3cf3f39c30>} {'OUTPUT': '/path/to/resultConcave.shp'}

1. -> no result shapefile produced under the given path

1. QGIS Error log
   Uncaught error while executing algorithm
   Traceback (most recent call last):
   Traceback (most recent call last):
   File "/usr/share/qgis/python/plugins/processing/core/GeoAlgorithm.py", line 217, in execute
   self.processAlgorithm(progress)
   File "/usr/share/qgis/python/plugins/processing/algs/qgis/ConcaveHull.py", line 81, in processAlgorithm
   progress.setPercentage(feat.id()*counter)
   File "/usr/share/qgis/python/plugins/processing/gui/MessageBarProgress.py", line 56, in setPercentage
   self.progress.setValue(i)
   RuntimeError: wrapped C/C++ object of type QProgressBar has been deleted