Hi All, just to let you know that I created an issue in the QGIS issue Tracking with this problem:
http://hub.qgis.org/issues/15311 Regards, Germán 2016-07-15 12:26 GMT-05:00 Germán Carrillo <[email protected]>: > Hi All, > > I've discovered an issue with QgsVectorLayerUndoCommand class > (QgsVectorLayerUndoCommandChangeAttribute.undo() method) when updating an > attribute value after featureAdded SIGNAL is emitted. > > Steps to reproduce: > > 1. Open QGIS, load a sample vector layer like this ( > http://downloads.tuxfamily.org/tuxgis/tmp/test_point.zip ) and select it > in the Layer List Widget (ToC). > 2. Run the following code snippet into the QGIS Python Console to connect > featureAdded SIGNAL to a custom SLOT that changes an attribute value: > > ################## > myLayer = iface.activeLayer() > field = 0 # Please use the test Shapefile provided, if not, adjust the > field index > > def updateFeatureAttrs( fId ): > f = myLayer.getFeatures( QgsFeatureRequest( fId ) ).next() > geom = f.geometry() > myLayer.changeAttributeValue( fId, field, geom.asPoint().x() ) > > myLayer.featureAdded.connect( updateFeatureAttrs ) > ################## > > 3. Start editing. Add a new point. (If a form opens click on OK). Don't > save anything. > 4. Stop editing and choose "Close without saving." > 5. QGIS crashes and prints the following error message: > > %%%%%%%%%%%%%%%%%%% > Fatal: ASSERT: "it != mBuffer->mAddedFeatures.end()" in file > /tmp/buildd/qgis-2.14.2+20trusty/src/core/qgsvectorlayerundocommand.cpp, > line 255 > Stacktrace (piped through c++filt): > /usr/bin/qgis.bin[0x40a440] > /usr/bin/qgis.bin[0x40a548] > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(qt_message_output(QtMsgType, char > const*)+0x21)[0x7fd508939bb1] > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(+0x70ff9)[0x7fd508939ff9] > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(qFatal(char const*, > ...)+0x94)[0x7fd50893a804] > > /usr/lib/libqgis_core.so.2.14.2(QgsVectorLayerUndoCommandChangeAttribute::undo()+0x659)[0x7fd5092e2c09] > > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QUndoCommand::undo()+0x50)[0x7fd5084144e0] > > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QUndoStack::setIndex(int)+0xc8)[0x7fd508414e58] > > /usr/lib/libqgis_core.so.2.14.2(QgsVectorLayerEditBuffer::rollBack()+0x23)[0x7fd5092c4d43] > > /usr/lib/libqgis_core.so.2.14.2(QgsVectorLayer::rollBack(bool)+0x46)[0x7fd5092b81e6] > /usr/lib/libqgis_app.so.2.14.2(QgisApp::toggleEditing(QgsMapLayer*, > bool)+0xb4b)[0x7fd50a1b677b] > /usr/lib/libqgis_app.so.2.14.2(+0x478d41)[0x7fd50a4edd41] > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(QMetaObject::activate(QObject*, > QMetaObject const*, int, void**)+0x2da)[0x7fd508a5a87a] > > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QAction::triggered(bool)+0x32)[0x7fd507dd9a62] > > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QAction::activate(QAction::ActionEvent)+0x63)[0x7fd507ddb433] > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(+0x57cb02)[0x7fd508192b02] > > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QAbstractButton::mouseReleaseEvent(QMouseEvent*)+0x6c)[0x7fd508192c2c] > > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QToolButton::mouseReleaseEvent(QMouseEvent*)+0xa)[0x7fd508249a4a] > > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QWidget::event(QEvent*)+0xaca)[0x7fd507e2f50a] > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QApplicationPrivate::notify_helper(QObject*, > QEvent*)+0x8c)[0x7fd507ddfe2c] > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QApplication::notify(QObject*, > QEvent*)+0x3ad)[0x7fd507de65dd] > /usr/lib/libqgis_core.so.2.14.2(QgsApplication::notify(QObject*, > QEvent*)+0x5b)[0x7fd509049c8b] > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(QCoreApplication::notifyInternal(QObject*, > QEvent*)+0x6d)[0x7fd508a464dd] > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QApplicationPrivate::sendMouseEvent(QWidget*, > QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, > bool)+0x153)[0x7fd507de5d93] > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(+0x2449cb)[0x7fd507e5a9cb] > > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(QApplication::x11ProcessEvent(_XEvent*)+0x1559)[0x7fd507e5a269] > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(+0x26bb02)[0x7fd507e81b02] > > /lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_context_dispatch+0x254)[0x7fd500ceee04] > /lib/x86_64-linux-gnu/libglib-2.0.so.0(+0x49048)[0x7fd500cef048] > > /lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_context_iteration+0x2c)[0x7fd500cef0ec] > > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)+0x71)[0x7fd508a737a1] > /usr/lib/x86_64-linux-gnu/libQtGui.so.4(+0x26bbb6)[0x7fd507e81bb6] > > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)+0x2f)[0x7fd508a450af] > > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)+0x175)[0x7fd508a453a5] > > /usr/lib/x86_64-linux-gnu/libQtCore.so.4(QCoreApplication::exec()+0x89)[0x7fd508a4ab79] > /usr/bin/qgis.bin[0x406fd7] > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7fd507358ec5] > /usr/bin/qgis.bin[0x409d48] > Aborted > %%%%%%%%%%%%%%%%%%% > > > I've tested both Shapefiles and SpatiaLite layers, getting the same error. > > > Do you have an idea of what could be happening? > > I'm using QGIS v.2.14.2 on a Linux Mint machine. > > > Regards, > > Germán > > -- > ----------- > |\__ > (:>__)( > |/ > Soluciones Geoinformáticas Libres > http://geotux.tuxfamily.org/ > http://twitter.com/GeoTux2 > http://about.me/germancarrillo > > <http://gis.stackexchange.com/users/4972/germ%c3%a1n-carrillo> > -- ----------- |\__ (:>__)( |/ Soluciones Geoinformáticas Libres http://geotux.tuxfamily.org/ http://twitter.com/GeoTux2 http://about.me/germancarrillo <http://gis.stackexchange.com/users/4972/germ%c3%a1n-carrillo>
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