[k3b] [Bug 383000] K3B crashes from time to tiem

[Bug Janitor Service]

https://bugs.kde.org/show_bug.cgi?id=383000

Bug Janitor Service  changed:

   What|Removed |Added

 Resolution|WAITINGFORINFO  |WORKSFORME
 Status|NEEDSINFO   |RESOLVED

--- Comment #13 from Bug Janitor Service  ---
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!

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Bug Janitor Service]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #12 from Bug Janitor Service  ---
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
mark the bug 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!

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Justin Zobel]

https://bugs.kde.org/show_bug.cgi?id=383000

Justin Zobel  changed:

   What|Removed |Added

 Resolution|--- |WAITINGFORINFO
 Status|REPORTED|NEEDSINFO

--- Comment #11 from Justin Zobel  ---
Thank you for the crash report.

As it has been a while since this was reported, can you please test and confirm
if this issue is still occurring or if this bug report can be marked as
resolved.

I have set the bug status to "needsinfo" pending your response, please change
back to "reported" or "resolved/worksforme" when you respond, thank you.

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #10 from Leslie Zhai  ---
Hi Michael,

Thanks for your report! please try my patch
https://commits.kde.org/k3b/9a289750eec11de8acfb9bf5aea12dcab09ba005

Regards,
Leslie Zhai

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #9 from Leslie Zhai  ---
Git commit 9a289750eec11de8acfb9bf5aea12dcab09ba005 by Leslie Zhai.
Committed on 07/08/2017 at 01:58.
Pushed by lesliezhai into branch 'master'.

Fix SRC_STATE use-after-free issue.

M  +4-2libk3b/plugin/k3baudiodecoder.cpp

https://commits.kde.org/k3b/9a289750eec11de8acfb9bf5aea12dcab09ba005

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Michael Lashkevich]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #8 from Michael Lashkevich  ---
I added a -debuginfo package from Packmann repository. A crash appeared on
closing k3b this time.

(gdb) backtrace
#0  0x000a in  ()
#1  0x71b98d84 in KFileMetaData::Extractor::~Extractor() () at
/usr/lib64/libKF5FileMetaData.so.3
#2  0x71b98da9 in KFileMetaData::Extractor::~Extractor() () at
/usr/lib64/libKF5FileMetaData.so.3
#3  0x71b9a41f in
KFileMetaData::ExtractorCollection::~ExtractorCollection() () at
/usr/lib64/libKF5FileMetaData.so.3
#4  0x77a9936e in K3b::AudioDecoder::~AudioDecoder() (this=0x1a41c30,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/libk3b/plugin/k3baudiodecoder.cpp:90
#5  0x77a9936e in K3b::AudioDecoder::~AudioDecoder() (this=0xd90fa0,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/libk3b/plugin/k3baudiodecoder.cpp:174
#6  0x7fffcc8b5299 in K3bMadDecoder::~K3bMadDecoder() (this=0xd90fa0,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/plugins/decoder/mp3/k3bmaddecoder.cpp:95
#7  0x77af6fc4 in
K3b::AudioDoc::decreaseDecoderUsage(K3b::AudioDecoder*) (this=,
decoder=0xd90fa0)
at /usr/src/debug/k3b-17.04.3/libk3b/projects/audiocd/k3baudiodoc.cpp:1056
#8  0x77afb592 in K3b::AudioFile::~AudioFile() (this=0x12b47b0,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/libk3b/projects/audiocd/k3baudiofile.cpp:53
#9  0x77afb5b9 in K3b::AudioFile::~AudioFile() (this=0x12b47b0,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/libk3b/projects/audiocd/k3baudiofile.cpp:54
#10 0x77aecf25 in K3b::AudioTrack::~AudioTrack() (this=0xaff1f0,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/libk3b/projects/audiocd/k3baudiotrack.cpp:101
#11 0x77aed059 in K3b::AudioTrack::~AudioTrack() (this=0xaff1f0,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/libk3b/projects/audiocd/k3baudiotrack.cpp:106
#12 0x77af31fe in K3b::AudioDoc::~AudioDoc() (this=0x11fab20,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/libk3b/projects/audiocd/k3baudiodoc.cpp:101
#13 0x77af3489 in K3b::AudioDoc::~AudioDoc() (this=0x11fab20,
__in_chrg=) at
/usr/src/debug/k3b-17.04.3/libk3b/projects/audiocd/k3baudiodoc.cpp:107
#14 0x004867e4 in K3b::MainWindow::queryClose() (this=0xcb02b0) at
/usr/src/debug/k3b-17.04.3/src/k3b.cpp:886
#15 0x75f90e74 in KMainWindow::closeEvent(QCloseEvent*) () at
/usr/lib64/libKF5XmlGui.so.5
#16 0x73719c68 in QWidget::event(QEvent*) () at
/usr/lib64/libQt5Widgets.so.5
#17 0x7382a0cb in QMainWindow::event(QEvent*) () at
/usr/lib64/libQt5Widgets.so.5
#18 0x75f91057 in KMainWindow::event(QEvent*) () at
/usr/lib64/libKF5XmlGui.so.5
#19 0x75fcdc45 in KXmlGuiWindow::event(QEvent*) () at
/usr/lib64/libKF5XmlGui.so.5
#20 0x736d7e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib64/libQt5Widgets.so.5
#21 0x736dc49a in QApplication::notify(QObject*, QEvent*) () at
/usr/lib64/libQt5Widgets.so.5
#22 0x7274efd5 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib64/libQt5Core.so.5
#23 0x73714fa9 in
QWidgetPrivate::close_helper(QWidgetPrivate::CloseMode) () at
/usr/lib64/libQt5Widgets.so.5
#24 0x73731ea6 in  () at /usr/lib64/libQt5Widgets.so.5
#25 0x73734e53 in  () at /usr/lib64/libQt5Widgets.so.5
#26 0x736d7e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib64/libQt5Widgets.so.5
#27 0x736dc49a in QApplication::notify(QObject*, QEvent*) () at
/usr/lib64/libQt5Widgets.so.5
#28 0x7274efd5 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib64/libQt5Core.so.5
#29 0x72f21e3c in
QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::CloseEvent*)
() at /usr/lib64/libQt5Gui.so.5
#30 0x72f25e35 in
QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
() at /usr/lib64/libQt5Gui.so.5
#31 0x72f07eeb in
QWindowSystemInterface::sendWindowSystemEvents(QFlags)
() at /usr/lib64/libQt5Gui.so.5
#32 0x7fffe1645bc0 in  () at /usr/lib64/libQt5XcbQpa.so.5
#33 0x7fffec127134 in g_main_context_dispatch () at
/usr/lib64/libglib-2.0.so.0
#34 0x7fffec127388 in  () at /usr/lib64/libglib-2.0.so.0
#35 0x7fffec12742c in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#36 0x7279f31c in
QEventDispatcherGlib::processEvents(QFlags) ()
at /usr/lib64/libQt5Core.so.5
#37 0x7274cfeb in
QEventLoop::exec(QFlags) () at
/usr/lib64/libQt5Core.so.5
#38 0x72754ed6 in QCoreApplication::exec() () at
/usr/lib64/libQt5Core.so.5
#39 0x00465f25 in main(int, char**) (argc=1, argv=) at
/usr/src/debug/k3b-17.04.3/src/main.cpp:133

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Erwin Lam]

https://bugs.kde.org/show_bug.cgi?id=383000

Erwin Lam  changed:

   What|Removed |Added

 CC|erw...@dds.nl   |

--- Comment #7 from Erwin Lam  ---
Leslie,

Please, do not add my e-mail address to other bug reports. I will do that
myself if I would be interested. Regarding this bug report, I did not
experience the issue nor did I report it.

Regards,
Erwin Lam

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #6 from Leslie Zhai  ---
Hi Erwin,

Could you do me a favor to reproduce the issue by gdb, and provide the
backtrance information please? thanks!

Regards,
Leslie Zhai

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

Leslie Zhai  changed:

   What|Removed |Added

 CC||erw...@dds.nl

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #5 from Leslie Zhai  ---
Hi Mark,

Thanks for your help! and please do me a favor to use gdb debug k3b and paste
the bt information, thanks!

Regards,
Leslie Zhai

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Mark]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #4 from Mark  ---
Hi Michael and g'day again Leslie,

Leslie, I can confirm at least that if main window is hidden when burning, it
never re-appears after closing the burning dialog even though k3b is still
running. This has always been the case in the Qt5 version (for me).

Michael, here is some info to help make a detailed backtrace. Un-install the
openSUSE package before beginning.

Firstly, you'll need to download and compile k3b with debugging information. In
a terminal, run the following:

git clone https://github.com/KDE/k3b.git
cd k3b
mkdir build-debug
cd build-debug
cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_C_FLAGS=-ggdb -DCMAKE_CXX_FLAGS=-ggdb
-DK3B_DEBUG=on -Wno-dev ..
make -j4
sudo make install

Now, start the debugging session by running:
gdb k3b

When loaded you'll have a prompt (gdb). Type (no quote marks) 'run' to start
k3b then use k3b normally until you trigger the segfault. Go back to the (gdb)
prompt and type 'backtrace'. Copy the output from this into your bug report. 

Now type 'detach' so that gdb closes the application then type 'quit' to exit
gdb.

Mark

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

Leslie Zhai  changed:

   What|Removed |Added

 CC||yy...@gmx.com

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #3 from Leslie Zhai  ---
Cc Dr. Chapatin, he can burn several projects
https://bugs.kde.org/show_bug.cgi?id=382488#c0 but no crash.

To Michael,
DrKonqi can not show the detailed backtrace information, please enable
-DK3B_DEBUG=ON https://github.com/KDE/k3b/blob/master/INSTALL.txt#L47 then use
gdb to bt, thanks!

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

--- Comment #2 from Leslie Zhai  ---
Cc Mark, could you help Michael to debug gdb? thanks!

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

Leslie Zhai  changed:

   What|Removed |Added

 CC||magpie...@gmx.com

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[k3b] [Bug 383000] K3B crashes from time to tiem

[Leslie Zhai]

https://bugs.kde.org/show_bug.cgi?id=383000

Leslie Zhai  changed:

   What|Removed |Added

 CC||lesliez...@llvm.org.cn

--- Comment #1 from Leslie Zhai  ---
Hi Michael,

Could you use gdb to debug k3b git master https://github.com/KDE/k3b I can not
reproduce the issue, thanks!

Regards,
Leslie Zhai - a LLVM developer https://reviews.llvm.org/p/xiangzhai/

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