Crash in categorized symbol renderer

[m-kuhn]

QGIS 3.10.2, Windows 10
Playing around with the renderer configuration crashed QGIS suddenly.

Crash ID: 72b82a2e92f5f9f6bbfe47e3f0a99b41ce357349


Stack Trace


QgsCategorizedSymbolRenderer::convertFromRenderer qgscategorizedsymbolrenderer.cpp:1064
QgsCategorizedSymbolRendererWidget::QgsCategorizedSymbolRendererWidget qgscategorizedsymbolrendererwidget.cpp:505
QgsCategorizedSymbolRendererWidget::create qgscategorizedsymbolrendererwidget.cpp:493
QgsRendererPropertiesDialog::rendererChanged qgsrendererpropertiesdialog.cpp:251
QMetaObject::activate :
QWidgetLineControl::`default constructor closure' :
QComboBox::setCurrentIndex :
QWidgetLineControl::`default constructor closure' :
QMetaObject::activate :
QComboBoxPrivateContainer::eventFilter :
QCoreApplicationPrivate::sendThroughObjectEventFilters :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify qgsapplication.cpp:418
QCoreApplication::notifyInternal2 :
QApplicationPrivate::sendMouseEvent :
QSizePolicy::QSizePolicy :
QSizePolicy::QSizePolicy :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify qgsapplication.cpp:418
QCoreApplication::notifyInternal2 :
QGuiApplicationPrivate::processMouseEvent :
QWindowSystemInterface::sendWindowSystemEvents :
QEventDispatcherWin32::processEvents :
UserCallWinProcCheckWow :
DispatchMessageWorker :
QEventDispatcherWin32::processEvents :
qt_plugin_query_metadata :
QEventLoop::exec :
QCoreApplication::exec :
main main.cpp:1598
BaseThreadInitThunk :
RtlUserThreadStart :




QGIS Info
QGIS Version: 3.10.2-A Coru�a
QGIS code revision: d4cd3cfe5a
Compiled against Qt: 5.11.2
Running against Qt: 5.11.2
Compiled against GDAL: 3.0.3
Running against GDAL: 3.0.3



System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.18363​

[m-kuhn]

Reproduction steps:

1. Open style dock (required?)
2. Choose heatmap renderer
3. Choose graduated renderer
4. Choose categroized renderer
5. 💥

[roya0045]

Seems to be a regression, 3.4 is fine for me.