QGIS crashes regularly (3.40.1)

[tombcd]

What is the bug or the crash?

QGIS crashes after opening the project and just browsing/panning the map. The same thing happened with the previous RC release.

Steps to reproduce the issue

1. Open the project.
2. Pan the map, zoom in, zoom out etc.
3. QGIS crashes in a while.

Versions

QGIS version	3.40.1-Bratislava
QGIS code revision	989853a7
Libraries
Qt version	5.15.13
Python version	3.12.7
GDAL/OGR version	3.9.3
PROJ version	9.5.0
EPSG Registry database version	v11.016 (2024-08-31)
GEOS version	3.13.0-CAPI-1.19.0
SQLite version	3.46.1
PDAL version	2.8.1
PostgreSQL client version	16.2
SpatiaLite version	5.1.0
QWT version	6.3.0
QScintilla2 version	2.14.1
OS version	Windows 10 Version 2009
Active Python plugins
BDOT10k_GML_SHP_Loader	2.0.1
deepness	0.6.4
dimensioning	0.2
geokodowanie_adresow	1.2.3
gissupport_plugin	2.5
pobieracz_danych_gugik	1.2.7
quick_map_services	0.19.36
wody_polskie_wms	1.0.3
db_manager	0.1.20
grassprovider	2.12.99
MetaSearch	0.3.6
processing	2.12.99

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

User Feedback

The crash occured while browsing the project contents.

Report Details

Python Stack Trace

Windows fatal exception: access violation

Thread 0x00004e64 (most recent call first):
  <no Python frame>

Stack Trace

QMutex::lock :
QCoreApplication::postEvent :
QObject::qt_static_metacall :
QgsTileDownloadManagerReply::requestFinished :
QgsTileDownloadManagerReply::header :
QMetaCallEvent::placeMetaCall :
QObject::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QCoreApplicationPrivate::sendPostedEvents :
QEventDispatcherWin32::processEvents :
QEventLoop::exec :
QgsRasterDataProvider::block :
QgsSingleBandColorDataRenderer::block :
QgsBrightnessContrastFilter::block :
QgsHueSaturationFilter::block :
QgsRasterResampleFilter::block :
QgsRasterProjector::block :
QgsRasterIterator::readNextRasterPartInternal :
QgsRasterIterator::readNextRasterPart :
QgsRasterDrawer::draw :
QgsRasterDrawer::draw :
QgsRasterLayerRendererFeedback::onNewData :
QObject::qt_static_metacall :
QgsTileDownloadManagerReply::requestFinished :
QgsTileDownloadManagerReply::header :
QMetaCallEvent::placeMetaCall :
QObject::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QCoreApplicationPrivate::sendPostedEvents :
QEventDispatcherWin32::processEvents :
QEventLoop::exec :
QgsRasterDataProvider::block :
QgsSingleBandColorDataRenderer::block :
QgsBrightnessContrastFilter::block :
QgsHueSaturationFilter::block :
QgsRasterResampleFilter::block :
QgsRasterProjector::block :
QgsRasterIterator::readNextRasterPartInternal :
QgsRasterIterator::readNextRasterPart :
QgsRasterDrawer::draw :
QgsRasterDrawer::draw :
QgsRasterLayerRendererFeedback::onNewData :
QObject::qt_static_metacall :
QgsTileDownloadManagerReply::requestFinished :
QgsTileDownloadManagerReply::header :
QMetaCallEvent::placeMetaCall :
QObject::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QCoreApplicationPrivate::sendPostedEvents :
QEventDispatcherWin32::processEvents :
QEventLoop::exec :
QgsRasterDataProvider::block :
QgsSingleBandColorDataRenderer::block :
QgsBrightnessContrastFilter::block :
QgsHueSaturationFilter::block :
QgsRasterResampleFilter::block :
QgsRasterProjector::block :
QgsRasterIterator::readNextRasterPartInternal :
QgsRasterIterator::readNextRasterPart :
QgsRasterDrawer::draw :
QgsRasterDrawer::draw :
QgsRasterLayerRendererFeedback::onNewData :
QObject::qt_static_metacall :
QgsTileDownloadManagerReply::requestFinished :
QgsTileDownloadManagerReply::header :
QMetaCallEvent::placeMetaCall :
QObject::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QCoreApplicationPrivate::sendPostedEvents :
QEventDispatcherWin32::processEvents :
QEventLoop::exec :
QgsRasterDataProvider::block :
QgsSingleBandColorDataRenderer::block :
QgsBrightnessContrastFilter::block :
QgsHueSaturationFilter::block :
QgsRasterResampleFilter::block :
QgsRasterProjector::block :
QgsRasterIterator::readNextRasterPartInternal :
QgsRasterIterator::readNextRasterPart :
QgsRasterDrawer::draw :
QgsRasterDrawer::draw :
QgsRasterLayerRendererFeedback::onNewData :
QObject::qt_static_metacall :
QgsTileDownloadManagerReply::requestFinished :
QgsTileDownloadManagerReply::header :
QMetaCallEvent::placeMetaCall :
QObject::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QCoreApplicationPrivate::sendPostedEvents :
QEventDispatcherWin32::processEvents :
QEventLoop::exec :
QgsRasterDataProvider::block :
QgsSingleBandColorDataRenderer::block :
QgsBrightnessContrastFilter::block :
QgsHueSaturationFilter::block :
QgsRasterResampleFilter::block :
QgsRasterProjector::block :
QgsRasterIterator::readNextRasterPartInternal :
QgsRasterIterator::readNextRasterPart :
QgsRasterDrawer::draw :
QgsRasterDrawer::draw :
QgsRasterLayerRendererFeedback::onNewData :
QObject::qt_static_metacall :
QgsTileDownloadManagerReply::requestFinished :
QgsTileDownloadManagerReply::header :
QMetaCallEvent::placeMetaCall :
QObject::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QCoreApplicationPrivate::sendPostedEvents :
QEventDispatcherWin32::processEvents :
QEventLoop::exec :
QgsRasterDataProvider::block :
QgsSingleBandColorDataRenderer::block :
QgsBrightnessContrastFilter::block :
QgsHueSaturationFilter::block :
QgsRasterResampleFilter::block :
QgsRasterProjector::block :
QgsRasterIterator::readNextRasterPartInternal :
QgsRasterIterator::readNextRasterPart :
QgsRasterDrawer::draw :
QgsRasterDrawer::draw :
QgsRasterLayerRenderer::render :
QgsMapRendererParallelJob::renderLayerStatic :
QgsProfilePlotRenderer::replaceSourceInternal :
QgsMapRendererParallelJob::renderingFinished :
QgsProfilePlotRenderer::cancelGenerationWithoutBlocking :
QtConcurrent::ThreadEngineBase::run :
QThreadPoolPrivate::reset :
QThread::start :
BaseThreadInitThunk :
RtlUserThreadStart :

QGIS Info
QGIS Version: 3.40.1-Bratislava
QGIS code revision: 989853a
Compiled against Qt: 5.15.13
Running against Qt: 5.15.13
Compiled against GDAL: 3.9.3
Running against GDAL: 3.9.3

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

[nicogodet]

Could you retry with a new QGIS profile (I see some python plugins installed in your ticket) ?

Does it happens with all project or a specific one ?

[tombcd]

Here's what I found.
Tried with a fresh profile, with the same project - it crashes same way.
Then, with that new profile, I have identified the WMS layer which, when enabled, makes QGIS crash after a while (I removed most of the other layers and left only 2 WMS layers).

Then, with that new profile, I created a new, empty project and added the same two WMS services as above and all works fine. So maybe there's some incompatibility issue within my 'old' project. I'll try to recreate my main project in that fresh environment so I'll be able to work - so it's for you to decide whether we should investigate it further or not.

[andreasneumann]

@tombcd Can you please share the project with the WMS - and maybe the WMS URL separately?

[tombcd]

PROJECT_bugreport.zip
I have attached the project file - enable layer "MEDIA" and try to zoom-in, zoom-out, pan, etc.
WMS service is:

https://wms.szamotuly.com.pl/cgi-bin/szamotuly-gesut

[andreasneumann]

@tombcd - I can confirm that with QGIS 3.40.1 your project crashes almost immediately after enabling the WMS, whereas with QGIS 3.34.13 (LTR) it runs stable.

[andreasneumann]

Trying also master (5ed3627bc0) - it also crashes after loading the WMS almost immediately.

So something seems to be broken in 3.40x with respect to WMS.