QGIS crashes when closing a feature dialog

[lindacamathias]

1. search for laax in the locator
2. activate the result with the laax municipality boundaries
3. the feature dialog shows up
4. close the feature dialog
5. :boom:

Crash ID: c1bdc72dfcf3772a499f7af2c4495f7565680df8

Stack Trace

QWindow::destroy :
QWindow::event :
QSizePolicy::QSizePolicy :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify qgsapplication.cpp:458
QCoreApplication::notifyInternal2 :
QGuiApplicationPrivate::processCloseEvent :
QWindowSystemInterface::sendWindowSystemEvents :
QEventDispatcherWin32::processEvents :
UserCallWinProcCheckWow :
DispatchMessageWorker :
QEventDispatcherWin32::processEvents :
qt_plugin_query_metadata :
QEventLoop::exec :
QCoreApplication::exec :
main main.cpp:1637
BaseThreadInitThunk :
RtlUserThreadStart :

QGIS Info
QGIS Version: 3.16.2-Hannover
QGIS code revision: f1660f9da5
Compiled against Qt: 5.11.2
Running against Qt: 5.11.2
Compiled against GDAL: 3.1.4
Running against GDAL: 3.1.4

System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 6.1.7601

Reproduced with QGIS 3.16.2 and QGIS master 22.1.

[3nids]

it should be fixed