Bug report #3839: qgis trunk crashes when saving project or clicking "OK" in the "new shape" dialog (or when using other dialogs) - QGIS Application - QGIS Issue Tracking

Bug report #3839

qgis trunk crashes when saving project or clicking "OK" in the "new shape" dialog (or when using other dialogs)

Added by Giovanni Manghi over 13 years ago. Updated over 13 years ago.

Status:	Closed
Priority:	Low
Assignee:	Redmine Admin
Category:	Build/Install
Affected QGIS version:		Regression?:	No
Operating System:	All	Easy fix?:	No
Pull Request or Patch supplied:		Resolution:	fixed
Crashes QGIS or corrupts data:		Copied to github as #:	13897

Description

Confirmed under Ubuntu and Windows.

Program seg faults. The responsible seems to be part of the code of the new "customization" feature

 [[QgsCustomization]]::preNotify (this=0x861c720, receiver=0x98c9d70, event=0x98e6420, done=0xb16d4f7f)
at /home/brushtyler/projects/sources/qgis/src/app/qgscustomization.cpp:841

backtrace_3839.txt - backtrace (3.37 KB) Giuseppe Sucameli, 2011-05-24 04:32 PM

History

#1 Updated by Giovanni Manghi over 13 years ago

More crashes for example when clicking "ok" or selecting files in various raster menu tools.

Debug: /home/brushtyler/projects/sources/qgis/src/app/qgscustomization.cpp: 794: (customizeWidget) p = /Customization/Widgets//QFileDialog/ on = 1
Debug: /home/brushtyler/projects/sources/qgis/src/app/qgscustomization.cpp: 860: (preNotify) click
Fatal: ASSERT: "d" in file /usr/include/qt4/QtCore/qscopedpointer.h, line 112

#2 Updated by Giuseppe Sucameli over 13 years ago

It occurs closing non-native file dialogs (look at the difference between Save project and SaveAs project dialogs), either by pressing ok or cancel buttons.

Adding a check to exclude QFileDialog instances (as done for not QDialog instances) doesn't work as expected. In fact the problem is at line 841 trying to cast QObject to QWidget because the object was deleted yet before the preNotify was called.

I've attached a backtrace.