Error when executing any type of expression in a QGIS layer.

[Vegametrica]

What is the bug or the crash?

Python Stack Trace
Windows fatal exception: access violation

Current thread 0x000032a0 (most recent call first):

Stack Trace

QBitArray::QBitArray :QgsSQLStatement::NodeFunction::name :QgsExpressionTreeView::updateFunctionTree :QgsExpressionTreeView::QgsExpressionTreeView :QgsExpressionBuilderWidget::setProject :QgsExpressionBuilderWidget::QgsExpressionBuilderWidget :QgsExpressionBuilderDialog::setGeomCalculator :QgsExpressionBuilderDialog::QgsExpressionBuilderDialog :QgsFieldExpressionWidget::editExpression :QObject::qt_static_metacall :QAbstractButton::clicked :QAbstractButton::click :QAbstractButton::mouseReleaseEvent :QToolButton::mouseReleaseEvent :QWidget::event :QApplicationPrivate::notify_helper :QApplication::notify :QgsApplication::notify :QCoreApplication::notifyInternal2 :QApplicationPrivate::sendMouseEvent :QSizePolicy::QSizePolicy :QSizePolicy::QSizePolicy :QApplicationPrivate::notify_helper :QApplication::notify :QgsApplication::notify :QCoreApplication::notifyInternal2 :QGuiApplicationPrivate::processMouseEvent :QWindowSystemInterface::sendWindowSystemEvents :QEventDispatcherWin32::processEvents :qt_plugin_query_metadata :QEventLoop::exec :QDialog::exec :QgisApp::showLayerProperties :QgisApp::layerProperties :QObject::qt_static_metacall :QAction::activate :QMenu::actionGeometry :QMenu::actionGeometry :QMenu::mouseReleaseEvent :QWidget::event :QMenu::event :QApplicationPrivate::notify_helper :QApplication::notify :QgsApplication::notify :QCoreApplication::notifyInternal2 :QApplicationPrivate::sendMouseEvent :QSizePolicy::QSizePolicy :QSizePolicy::QSizePolicy :QApplicationPrivate::notify_helper :QApplication::notify :QgsApplication::notify :QCoreApplication::notifyInternal2 :QGuiApplicationPrivate::processMouseEvent :QWindowSystemInterface::sendWindowSystemEvents :QEventDispatcherWin32::processEvents :qt_plugin_query_metadata :QEventLoop::exec :QMenu::exec :QMenu::exec :QgsLayerTreeView::contextMenuEvent :QWidget::event :QFrame::event :QAbstractItemView::viewportEvent :QCoreApplicationPrivate::sendThroughObjectEventFilters :QApplicationPrivate::notify_helper :QApplication::notify :QgsApplication::notify :QCoreApplication::notifyInternal2 :QSizePolicy::QSizePolicy :QSizePolicy::QSizePolicy :QApplicationPrivate::notify_helper :QApplication::notify :QgsApplication::notify :QCoreApplication::notifyInternal2 :QGuiApplicationPrivate::processMouseEvent :QWindowSystemInterface::sendWindowSystemEvents :QEventDispatcherWin32::processEvents :qt_plugin_query_metadata :QEventLoop::exec :QCoreApplication::exec :main :BaseThreadInitThunk :RtlUserThreadStart :

QGIS Info
QGIS Version: 3.40.7-Bratislava
QGIS code revision: 91d544f
Compiled against Qt: 5.15.13
Running against Qt: 5.15.13
Compiled against GDAL: 3.10.3
Running against GDAL: 3.10.3

System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.19045

Steps to reproduce the issue

1. Go to the layers Property
2. Open the expression operator in the symbology or labeling module
3. Popup informing about the error

Versions

3.40.7 but I had installed others

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[agiudiceandrea]

@Vegametrica, does the crash occur when "executing any expression" or when "opening the expression operator"? Please try if the issue occurs also using a new QGIS user profile without any external third-party plugin installed. If it does, please provide the QGIS project's file and the layer's file.