Bug 309182

Summary:	Kwin crashes after upgrade to Kubuntu 12.04
Product:	[Plasma] kwin	Reporter:	Evgeniy <mailfiles.support>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	crash	Keywords:	triaged
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Evgeniy 2012-10-29 06:38:20 UTC

Application: kwin (4.8.5 (4.8.5))
KDE Platform Version: 4.8.5 (4.8.5)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-32-generic-pae i686
Distribution: Ubuntu 12.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

nothing. Kwin crashes after upgrade to Kubuntu 12.04.
First, it worked ~2 days normally, then crashed and never starts correctly again. Crashes after each try of start.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#7  QAbstractConcatenable::convertFromAscii (a=0xb6f7c854 "left", len=5, out=@0x0: <error reading variable>) at tools/qstringbuilder.cpp:167
#8  0xb6dfa873 in appendTo (a=0xb6f7c854 "left", out=@0xbfc9101c: 0x8319922) at /usr/include/qt4/QtCore/qstringbuilder.h:314
#9  appendTo<QChar> (out=@0xbfc9101c: 0x8319922, p=...) at /usr/include/qt4/QtCore/qstringbuilder.h:404
#10 convertTo<QString> (this=<optimized out>) at /usr/include/qt4/QtCore/qstringbuilder.h:126
#11 operator QStringBuilder<QString, char [5]>::ConvertTo (this=<optimized out>) at /usr/include/qt4/QtCore/qstringbuilder.h:139
#12 Plasma::FrameSvgPrivate::updateSizes (this=0x831a288) at ../../plasma/framesvg.cpp:973
#13 0xb6dfb920 in Plasma::FrameSvgPrivate::frameSize (this=0x831a288, frame=0x82ef928) at ../../plasma/framesvg.cpp:1034
#14 0xb6dfba0e in Plasma::FrameSvgPrivate::cacheId (this=0x831a288, frame=0x82ef928, prefixToSave=...) at ../../plasma/framesvg.cpp:920
#15 0xb6dfe71a in Plasma::FrameSvg::setImagePath (this=0x8335368, path=...) at ../../plasma/framesvg.cpp:75
#16 0xb77011ee in KWin::DesktopChangeOSD::DesktopChangeOSD (this=0x8335350, ws=0x82d1650) at ../../kwin/desktopchangeosd.cpp:56
#17 0xb761ec5e in KWin::Workspace::Workspace (this=0x82d1650, restore=false) at ../../kwin/workspace.cpp:246
#18 0xb763a043 in KWin::Application::Application (this=0xbfc91938) at ../../kwin/main.cpp:322
#19 0xb763c3ae in kdemain (argc=3, argv=0xbfc91be4) at ../../kwin/main.cpp:511
#20 0x0804850b in main (argc=3, argv=0xbfc91be4) at kwin_dummy.cpp:3

Reported using DrKonqi

Comment 1 Thomas Lübking 2012-10-30 17:44:47 UTC

The backtrace shows a segfault in QStringBuilder, invoked by plasma (invoked by the desktop chaning OSD) so either there's a memory corruption, or a problem quite deep down.

Do all crashtraces look the same?

Comment 2 Martin Flöser 2012-12-29 08:57:31 UTC

please answer the question from comment #1

Comment 3 Andrew Crouthamel 2018-09-24 02:10:19 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days, the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please set the bug status as REPORTED so that the KDE team knows that the bug is ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 4 Andrew Crouthamel 2018-10-27 02:40:14 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!