QGIS » QGIS Application

QGIS crashes when using a QgsExternalResourceWidget in the Attribute TableView to edit the String Field value of a QgsVectorLayer (tested in-memory and geopackage)

Test-Case: Assume we have a QgsVectorFile with string QgsField "textfield"

1. Layer Properties -> Attribute Forms -> set Widget Type of "textfield" to "Attachment" (activates the QgsExternalResourceWidgetWrapper + Factory) (01_AttributeFormDialog.png)
2. Open Attribute Table View, activate Edit mode and try to edit attribute "textfield" creates an edit widget (02_EditTableView.png)
3. Left-Mouse-clock on "..." button opens a "select file dialog" BUT the edit widget disappears meanwhile (03_DisappearedEditWidget.png)
4. Leaving the "select file dialog" (accept/cancel) crashed QGIS

Similar behavior was observed for own implementations of QgsEditorWidgetWrappers using QGIS Python API.

Stack Trace

IUnknown_QueryService :
DllGetClassObject :
DllGetClassObject :
QDialog::exec :
QFileDialog::getOpenFileUrl :
QFileDialog::getOpenFileName :
QgsFileWidget::openFileDialog :
QMetaObject::activate :
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 :
CallWindowProcW :
DispatchMessageW :
QEventDispatcherWin32::processEvents :
qt_plugin_query_metadata :
QEventLoop::exec :
QCoreApplication::exec :
main :
BaseThreadInitThunk :
RtlUserThreadStart :

QGIS Info
QGIS Version: 3.2.3-Bonn
QGIS code revision: 0de984d7f9
Compiled against Qt: 5.11.2
Running against Qt: 5.11.2
Compiled against GDAL: 2.3.2
Running against GDAL: 2.3.2

System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.17134