Hi,
I have code within a plugin that I am writing that is similar to:
```
def feature_added(self, fid):
self.vlayer.beginEditCommand('Update attributes')
self.vlayer.changeAttributeValue(fid, 2, 17)
self.vlayer.endEditCommand()
```
It is called in response to a featureAdded signal from the layer. The command
runs and the attributes are updated and the canvas refreshes to show them.
However, when I check the undoStack for the layer, the command is not present.
When I press 'Undo', QGIS has a hard crash.
If I use the QGIS iPython console to access the layer directly through my
plugin (e.g. via qgis.utils.plugins['MyPlugin']) and type the equivalent
commands directly into the console, everything works as expected, but the
changes are not visible until the canvas is manually refreshed.
Is there something else that should / shouldn't be called by the plugin to put
the undo command onto the stack?
I'm on QGIS 2.12.0 on Linux Mint 17 (Ubuntu 14.04).
Thanks,
John
John Stevenson
Senior Developer
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