Crash with custom ui for form

[qgib]

Author Name: Hugo Mercier (@mhugo)
Original Redmine Issue: 17564
Affected QGIS version: master
Redmine category:edit_widget
Assignee: Matthias Kuhn

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Problem introduced according to git bisect by 53d642 by David

Steps to reproduce:

• take a vector layer with a (text) field "name"
• create a .ui widget with a QLineEdit with name "name"
• use this .ui as the attribute form
• use the identify tool on a feature
• crash

[qgib]

Author Name: Matthias Kuhn (@m-kuhn)

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You wouldn't have a trace ready by any chance?

[qgib]

Author Name: Hugo Mercier (@mhugo)

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Thread 1 "qgis" received signal SIGSEGV, Segmentation fault.
0x00007ffff1fd12e9 in QgsAttributeFormEditorWidget::setConstraintResultVisible (this=0x0, editable=false)
    at /home/hme/src/QGIS/src/gui/qgsattributeformeditorwidget.cpp:114
114	  mConstraintResultLabel->setHidden( !editable );
(gdb) bt
#_0  0x00007ffff1fd12e9 in QgsAttributeFormEditorWidget::setConstraintResultVisible (this=0x0, editable=false)
    at /home/hme/src/QGIS/src/gui/qgsattributeformeditorwidget.cpp:114
#_1  0x00007ffff1fbdf5c in QgsAttributeForm::synchronizeEnabledState (this=0x306c0d0) at /home/hme/src/QGIS/src/gui/qgsattributeform.cpp:983
#_2  0x00007ffff1fb96de in QgsAttributeForm::setFeature (this=0x306c0d0, feature=...) at /home/hme/src/QGIS/src/gui/qgsattributeform.cpp:243
#_3  0x00007ffff1fb862f in QgsAttributeForm::QgsAttributeForm (this=0x306c0d0, vl=0x3098800, feature=..., context=..., parent=0x327ce00)
    at /home/hme/src/QGIS/src/gui/qgsattributeform.cpp:72
#_4  0x00007ffff1fb7622 in QgsAttributeDialog::init (this=0x327ce00, layer=0x3098800, feature=0x2f61450, context=..., showDialogButtons=true)
    at /home/hme/src/QGIS/src/gui/qgsattributedialog.cpp:97
#_5  0x00007ffff1fb6e88 in QgsAttributeDialog::QgsAttributeDialog (this=0x327ce00, vl=0x3098800, thepFeature=0x2f61450, featureOwner=true, parent=0x2f76f90, 
    showDialogButtons=true, context=...) at /home/hme/src/QGIS/src/gui/qgsattributedialog.cpp:30
#_6  0x00007ffff720a170 in QgsFeatureAction::newDialog (this=0x7fffffffba80, cloneFeature=true) at /home/hme/src/QGIS/src/app/qgsfeatureaction.cpp:67
#_7  0x00007ffff720ab4f in QgsFeatureAction::viewFeatureForm (this=0x7fffffffba80, h=0x3048680) at /home/hme/src/QGIS/src/app/qgsfeatureaction.cpp:115
#_8  0x00007ffff71fcaf5 in QgsIdentifyResultsDialog::featureForm (this=0x2f76f90) at /home/hme/src/QGIS/src/app/qgsidentifyresultsdialog.cpp:1693
#_9  0x00007ffff71f6ee1 in QgsIdentifyResultsDialog::show (this=0x2f76f90) at /home/hme/src/QGIS/src/app/qgsidentifyresultsdialog.cpp:969
#_10 0x00007ffff7283372 in QgsMapToolIdentifyAction::canvasReleaseEvent (this=0xf795f0, e=0x5a62770)
    at /home/hme/src/QGIS/src/app/qgsmaptoolidentifyaction.cpp:158
#_11 0x00007ffff2106808 in QgsMapCanvas::mouseReleaseEvent (this=0xda7530, e=0x7fffffffc430) at /home/hme/src/QGIS/src/gui/qgsmapcanvas.cpp:1434
#_12 0x00007ffff5487f88 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_13 0x00007ffff5586b4e in QFrame::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_14 0x00007ffff5796e93 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_15 0x00007ffff4b52172 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_16 0x00007ffff544503c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_17 0x00007ffff544ac19 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_18 0x00007ffff6016c7b in QgsApplication::notify (this=0x7fffffffd880, receiver=0xdbe7b0, event=0x7fffffffc430)
    at /home/hme/src/QGIS/src/core/qgsapplication.cpp:317
#_19 0x00007ffff4b5238b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_20 0x00007ffff5449b32 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_21 0x00007ffff54a257b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_22 0x00007ffff54a4b3b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_23 0x00007ffff544505c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_24 0x00007ffff544a516 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_25 0x00007ffff6016c7b in QgsApplication::notify (this=0x7fffffffd880, receiver=0x2b283a0, event=0x7fffffffc8e0)
    at /home/hme/src/QGIS/src/core/qgsapplication.cpp:317
#_26 0x00007ffff4b5238b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_27 0x00007ffff4e944e1 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#_28 0x00007ffff4e961a5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#_29 0x00007ffff4e79f08 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#_30 0x00007fffd5b16060 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#_31 0x00007fffec49e197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#_32 0x00007fffec49e3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#_33 0x00007fffec49e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#_34 0x00007ffff4ba87cf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_35 0x00007ffff4b4fb4a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_36 0x00007ffff4b57bec in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_37 0x00000000004135e0 in main (argc=3, argv=0x7fffffffdce8) at /home/hme/src/QGIS/src/app/main.cpp:1398

[qgib]

Author Name: Matthias Kuhn (@m-kuhn)

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Thanks a lot,

#5743 should fix it

[qgib]

Author Name: Hugo Mercier (@mhugo)

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Hmmm, in my case

"mFormEditorWidgets.value( eww->fieldIdx() )" is nullptr in QgsAttributeForm::synchronizeEnabledState

0x00007ffff1fd12e9 in QgsAttributeFormEditorWidget::setConstraintResultVisible (this=0x0, editable=false)

[qgib]

Author Name: Matthias Kuhn (@m-kuhn)

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Silly me... Of course.

[qgib]

Author Name: Anónimo (Anónimo)

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Applied in changeset 3c702c0.

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• status_id was changed from Open to Closed
• done_ratio was changed from 0 to 100

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• resolution was changed from to fixed/implemented

[qgib]

Author Name: Jürgen Fischer (@jef-n)

---

• description was changed from Problem introduced according to git bisect by a recent commit by David
  53d642

Steps to reproduce:

• take a vector layer with a (text) field "name"

• create a .ui widget with a QLineEdit with name "name"

• use this .ui as the attribut form

• use the identify tool on a feature

• crash

  to Problem introduced according to git bisect by commit:53d642 by David

Steps to reproduce:

• take a vector layer with a (text) field "name"
• create a .ui widget with a QLineEdit with name "name"
• use this .ui as the attribute form
• use the identify tool on a feature
• crash