[Qgis-developer] buffer segmentation fault
rdmailings at duif.net
Thu Jan 8 08:25:50 EST 2009
I did have this behaviour a few months ago (around preview 1). I use the
buffer function to define an AREA for point features in the HtmlImageMap
But after a certain version it doesn't segfault anymore, so I thought it
was a known problem which was fixed.
Trying your lines in a Windows Preview2 NOW does NOT segfault qgis here.
On a freshly build 1.0 also not at this moment.
I'm not able to build trunk at this moment.
Does the memory/pointer erro Martin is pointing at maybe have something
to do with it?
Carson Farmer wrote:
> Hello again,
> Quick question for the list before I submit a bug...
> Is anyone else getting a segmentation fault when attempting to buffer
> features (points, lines, or polygons)? It is possible this is a GEOS
> issue, but I'm not sure...
> Here is some sample code to try in the python console if you want to
> confirm the above behaviour (assumes your target layer is the first
> layer in your TOC):
> >>> map_canvas = iface.mapCanvas()
> >>> layer = map_canvas.layer( 0 )
> >>> provider = layer.dataProvider()
> >>> all_attributes = provider.attributeIndexes()
> >>> provider.select( all_attributes )
> >>> feature = QgsFeature()
> >>> provider.nextFeature( feature )
> >>> geometry = feature.geometry()
> >>> buffer = geometry.buffer( 500, 5 ) #replace with some relevant
> and here QGIS closes unexpectedly, leaving the following in the console:
> Python support ENABLED :-)
> Loaded : Plugin Installer (package: plugin_installer)
> Loaded : fTools (package: fTools)
> Segmentation fault
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