[Qgis-developer] crash when accessing geometry from Python console

[Bernhard Ströbl]

Hi Martin,

I was not aware of this bug, thanks for pointing me towards it. As 
posted previously I found a workaround but if I use 
geometryAndOwnership() as proposed in #777 do I have to do anything like
g = None to destroy the geometry or will Python take care of that as 
soon as my script has been finished?

thank you for your help

Bernhard

Am 25.06.2015 um 09:00 schrieb Martin Dobias:
> Hi Bernhard
>
> that's a long standing unresolved issue with python bindings:
> http://hub.qgis.org/issues/777
>
> Regards
> Martin
>
>
>
> On Thu, Jun 25, 2015 at 2:43 PM, Bernhard Ströbl
> <bernhard.stroebl at jena.de> wrote:
>> Hi everybody,
>>
>> I try to do the following from the Python console:
>> g=iface.activeLayer().selectedFeatures()[0].geometry()
>> returns a QgsGeometry objekt but as soon as I want to do anything with it
>> QGIS crashes (layer is a memory line layer but a PostGIS linestring layer
>> behaves the same). Any request like
>> g.type()
>> g.length()
>> g.anything crashes QGIS
>> g.asPolyline() crash if the line has three vertices, with only two vertices
>> it returns an empty array.
>>
>> My goal is not the Python console but a plugin; the plugin crashes, too :-(
>>
>> tested with 2.8 on Win7 (64bit) and 2.8 & 2.9 on Ubuntu (64 bit) so it
>> should not be connected to the geometry overhaul I reckon.
>>
>> any help appreciated
>>
>> Bernhard
>>
>>


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