https://bugs.kde.org/show_bug.cgi?id=362907
Bug ID: 362907
Summary: kwin_x11 crashes in QtCurve::Style::disconnectDBus()
Product: QtCurve
Version: git
Platform: Debian testing
URL: https://bugs.debian.org/823674
OS: Linux
Status: UNCONFIRMED
Severity: crash
Priority: NOR
Component: qt5
Assignee: yyc1...@gmail.com
Reporter: tehnic...@yandex.ru
CC: h...@kde.org
After updating QtCurve from 1.8.18+git20160112-0cd6aae (1.8.18-247-gd126bd5) to
1.8.18+git20160320-3d8622c (1.8.18-251-g3d8622c) users report about multiple
kwin_x11 crashes at KDE startup.
Typical backtrace looks like this:
Program received signal SIGSEGV, Segmentation fault.
0xb52fdb78 in QDBusConnection::QDBusConnection(QDBusConnection const&) ()
from /usr/lib/i386-linux-gnu/libQt5DBus.so.5
(gdb) bt full
#0 0xb52fdb78 in QDBusConnection::QDBusConnection(QDBusConnection const&) ()
from /usr/lib/i386-linux-gnu/libQt5DBus.so.5
No symbol table info available.
#1 0xb53008f4 in QDBusConnection::sessionBus() ()
from /usr/lib/i386-linux-gnu/libQt5DBus.so.5
No symbol table info available.
#2 0xb0a9d11a in QtCurve::Style::disconnectDBus (this=0x809f690)
at ../../../qt5/style/qtcurve.cpp:694
cb = <optimized out>
bus = {static staticMetaObject = {d = {superdata = 0x0, stringdata =
0xb5356e20,
data = 0xb5356ce0, static_metacall = 0x0, relatedMetaObjects =
0x0,
extradata = 0x0}}, d = 0x8062238}
#3 0xb0a9d429 in QtCurve::Style::<lambda(void*)>::operator()(void *)
(data=<optimized out>,
__closure=<optimized out>) at ../../../qt5/style/qtcurve.cpp:663
No locals.
#4 0xb0ae2678 in QtCurve::runAllCleanups () at
../../../qt5/style/qtcurve_plugin.cpp:86
func = <optimized out>
data = <optimized out>
#5 0xb0ae2884 in QtCurve::StylePlugin::~StylePlugin (this=0x809c310,
__in_chrg=<optimized out>) at ../../../qt5/style/qtcurve_plugin.cpp:167
No locals.
#6 0xb0ae28ca in QtCurve::StylePlugin::~StylePlugin (this=0x809c310,
__in_chrg=<optimized out>) at ../../../qt5/style/qtcurve_plugin.cpp:170
No locals.
#7 0xb6b198b5 in ?? () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#8 0xb6b11c54 in ?? () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#9 0xb6b11e5a in ?? () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#10 0xb6b5cf3c in QObject::~QObject() () from
/usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#11 0xb6b10e33 in QFactoryLoader::~QFactoryLoader() ()
from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#12 0xb747beb8 in ?? () from /usr/lib/i386-linux-gnu/libQt5Widgets.so.5
No symbol table info available.
#13 0xb7dfa933 in __run_exit_handlers (status=1, listp=0xb7f803dc
<__exit_funcs>,
run_list_atexit=true) at exit.c:82
atfct = <optimized out>
onfct = <optimized out>
cxafct = <optimized out>
#14 0xb7dfa98f in __GI_exit (status=1) at exit.c:104
No locals.
#15 0xb7f86e39 in ?? () from /usr/lib/i386-linux-gnu/libkdeinit5_kwin_x11.so
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#16 0xb6b551d0 in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#17 0xb6b55aad in QMetaObject::activate(QObject*, QMetaObject const*, int,
void**) ()
from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#18 0xb7a8e3e2 in KSelectionOwner::failedToClaimOwnership() ()
from /usr/lib/i386-linux-gnu/libKF5WindowSystem.so.5
No symbol table info available.
#19 0xb7a79319 in KSelectionOwner::claim(bool, bool) ()
from /usr/lib/i386-linux-gnu/libKF5WindowSystem.so.5
No symbol table info available.
#20 0xb7f87aab in ?? () from /usr/lib/i386-linux-gnu/libkdeinit5_kwin_x11.so
No symbol table info available.
#21 0xb7b91ff4 in KWin::Application::start() () from
/usr/lib/i386-linux-gnu/libkwin.so.5
No symbol table info available.
#22 0xb7f885ac in kdemain () from
/usr/lib/i386-linux-gnu/libkdeinit5_kwin_x11.so
No symbol table info available.
#23 0x08048607 in main ()
No symbol table info available.
Another example:
https://bugs.debian.org/823674
Reproducible: Always
Steps to Reproduce:
1. Login to KDE Plasma 5.
2. kwin_x11 crashes.
3. Close crash dialog window.
4. kwin_x11 crashes again.
5. Close crash dialog window.
6. kwin_x11 crashes again.
7. ...
Actual Results:
Despite this annoying crash dialog all programs works like expected. Or I have
missed something...
Expected Results:
QtCurve should work as earlier after this code refactoring.
System: up to date Debian testing or unstable
Libraries: Qt -- 5.5.1, KF5 -- 5.16.0, kwin-x11 -- 5.4.3
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