TIN interpolation issue of not happening

[ro6282]

What is the bug or the crash?

I tried to open TIN interpolation, but it failed and had an error like below.

Steps to reproduce the issue

Report Details

Report Details

Python Stack Trace

Windows fatal exception: access violation

Current thread 0x00000ce8 (most recent call first):
  File "C:\PROGRA~1/QGISQT~1.7/apps/qgis-ltr-qt6/./python/plugins\processing\algs\qgis\ui\InterpolationWidgets.py", line 428 in postInitialize
    if wrapper.parameterDefinition().name() == self.param.layersData:
  File "C:\PROGRA~1/QGISQT~1.7/apps/qgis-ltr-qt6/./python/plugins\processing\gui\ParametersPanel.py", line 214 in initWidgets
    wrapper.postInitialize(list(self.wrappers.values()))
  File "C:\PROGRA~1/QGISQT~1.7/apps/qgis-ltr-qt6/./python/plugins\processing\gui\ParametersPanel.py", line 73 in __init__
    self.initWidgets()
  File "C:\PROGRA~1/QGISQT~1.7/apps/qgis-ltr-qt6/./python/plugins\processing\gui\AlgorithmDialog.py", line 109 in getParametersPanel
    panel = ParametersPanel(parent, alg, self.in_place, self.active_layer)
  File "C:\PROGRA~1/QGISQT~1.7/apps/qgis-ltr-qt6/./python/plugins\processing\gui\AlgorithmDialog.py", line 72 in __init__
    self.setMainWidget(self.getParametersPanel(alg, self))
  File "C:\PROGRA~1/QGISQT~1.7/apps/qgis-ltr-qt6/./python/plugins\processing\ProcessingPlugin.py", line 505 in executeAlgorithm
    dlg = AlgorithmDialog(alg, in_place, iface.mainWindow())
  File "C:\PROGRA~1/QGISQT~1.7/apps/qgis-ltr-qt6/./python/plugins\processing\gui\ProcessingToolbox.py", line 272 in executeAlgorithm
    self.executeWithGui.emit(alg.id(), self, self.in_place_mode, False)

Stack Trace

PyInit_sip :
PyInit_sip :
PyInit_sip :
PyInit__gui :
PyThread_acquire_lock_timed :
PyObject_Vectorcall :
PyObject_CallOneArg :
PyThreadState_GetFrame :
PyObject_GenericGetAttrWithDict :
PyObject_FastCallDictTstate :
PyObject_GetAttr :
PyEval_EvalFrameDefault :
PyFunction_Vectorcall :
PyNumber_Long :
PyObject_Vectorcall :
PyObject_Vectorcall :
PyEval_EvalFrameDefault :
PyFunction_Vectorcall :
PyNumber_Long :
PyObject_Vectorcall :
PyObject_Vectorcall :
PyEval_EvalFrameDefault :
PyFunction_Vectorcall :
PyArg_CheckPositional :
PyObject_Call :
PyObject_Call :
PyInit_QtCore :
PyInit_QtCore :
PyInit_QtCore :
PyInit_QtCore :
PyInit_QtCore :
PyInit_QtCore :
QMetaObject::metacall :
QObject::qt_static_metacall :
QMetaObject::activate :
PyInit_QtCore :
PyInit_QtCore :
PyObject_Vectorcall :
PyObject_Vectorcall :
PyEval_EvalFrameDefault :
PyFunction_Vectorcall :
PyArg_CheckPositional :
PyObject_Call :
PyObject_Call :
PyInit_QtCore :
PyInit_QtCore :
PyInit_QtCore :
PyInit_QtCore :
QMetaObject::metacall :
QObject::qt_static_metacall :
QMetaObject::activate :
QAbstractItemView::doubleClicked :
QTreeView::mouseDoubleClickEvent :
PyInit__gui :
QWidget::event :
QFrame::event :
QAbstractItemView::viewportEvent :
PyInit__gui :
QCoreApplicationPrivate::sendThroughObjectEventFilters :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QApplicationPrivate::sendMouseEvent :
QWidgetRepaintManager::updateStaticContentsSize :
QWidgetRepaintManager::updateStaticContentsSize :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QGuiApplicationPrivate::processMouseEvent :
QWindowSystemInterface::sendWindowSystemEvents :
QEventDispatcherWin32::processEvents :
QWindowsGuiEventDispatcher::processEvents :
QEventLoop::exec :
QCoreApplication::exec :
main :
BaseThreadInitThunk :
RtlUserThreadStart :

QGIS Info
QGIS Version: 3.40.7-Bratislava
QGIS code revision: 91d544f
Compiled against Qt: 6.8.1
Running against Qt: 6.8.1
Compiled against GDAL: 3.10.3
Running against GDAL: 3.10.3

System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.26100

Versions

QGIS 버전	3.40.7-Bratislava
QGIS 코드 리비전	91d544fd
Libraries
Qt 버전	6.8.1
파이썬 버전	3.12.10
GDAL version	3.10.3
PROJ 버전	9.6.0
EPGS 레지스트리 데이터베이스 버전	v12.004 (2025-03-02)
GEOS 버전	3.13.1-CAPI-1.19.2
SQLite 버전	3.46.1
PDAL 버전	2.8.3
PostgreSQL 클라이언트 버전	unknown
SpatiaLite 버전	5.1.0
QWT 버전	6.3.0
QScintilla2 버전	2.14.1
OS 버전	Windows 11 Version 24H2
활성화된 파이썬 플러그인
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

[ViperMiniQ]

This was corrected in #61616, but it wasn't backported to LTR version.

[agiudiceandrea]

@ViperMiniQ, should #61616 be backported?

[ViperMiniQ]

@agiudiceandrea, I am not familiar with the policy of backports, unfortunately.

This only affects the Qt6 build and @ro6282 wouldn't be getting this error if they were using the Qt5 build or version 3.42 since the #61616.

3.40 will be the last QGIS version 3 LTR based on Qt5, so I guess not.
Although, the fix does not affect the functionality of the Qt5 version.

Edit: the issue can be closed.

[agiudiceandrea]

@nyalldawson, what do you think about this? Should the PR (and other similar ones) that fixes this issue be backported to 3.40 even if it only fixes an issue occurring when Qt6 is used? Or should the QGIS LTR 3.40 Qt6 build be considered experimental and not worth fixing? Currently QGIS LTR 3.40 built against Qt6 is available for Windows (via OSGeo4W) and download offered via qgis.org website.