This is at least in Plasma 5 enviroment. KF5 is master, Qt latest from 5.4 branch. Reproducible: Always Steps to Reproduce: 1. Have konversation running. 2. Change the style in systemsettings5/kcmshell5 style. Actual Results: Segfault. Expected Results: ;-) The backtrace points to somewhere lower in the stack, but konvi is so far only app that i found to segfault: Thread 1 (Thread 0x7ffff7f82880 (LWP 11814)): #0 0x00007ffff2bb225e in QWidget::testAttribute_helper(Qt::WidgetAttribute) const (this=this@entry=0x250b0e0, attribute=attribute@entry=Qt::WA_WState_Polished) at kernel/qwidget.cpp:11201 #1 0x00007ffff2b885d8 in QApplication::setStyle(QStyle*) (attribute=Qt::WA_WState_Polished, this=0x250b0e0) at ../../src/widgets/kernel/qwidget.h:851 #2 0x00007ffff2b885d8 in QApplication::setStyle(QStyle*) (style=<optimized out>) at kernel/qapplication.cpp:1237 #3 0x00007ffff2b89196 in QApplication::setStyle(QString const&) (style=...) at kernel/qapplication.cpp:1295 #4 0x00007fffe1caf8b3 in KHintsSettings::slotNotifyChange(int, int) (this=0xdc7f40, type=<optimized out>, arg=<optimized out>) at /usr/src/debug/frameworkintegration-5.9.0git~20150326T235157~901dc47/src/platformtheme/khintssettings.cpp:274 #5 0x00007fffe1cba093 in KHintsSettings::qt_metacall(QMetaObject::Call, int, void**) (this=0xdc7f40, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0x7fffffffcca0) at /usr/src/debug/frameworkintegration-5.9.0git~20150326T235157~901dc47/build/src/platformtheme/moc_khintssettings.cpp:116 #6 0x00007ffff20aa75f in () at /usr/lib64/libQt5DBus.so.5 #7 0x00007ffff1a1aad6 in QObject::event(QEvent*) (this=0xdc7f40, e=<optimized out>) at kernel/qobject.cpp:1245 #8 0x00007ffff2b86b5c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry= 0xd9bbc0, receiver=receiver@entry=0xdc7f40, e=e@entry=0x27a96d0) at kernel/qapplication.cpp:3720 #9 0x00007ffff2b8ba26 in QApplication::notify(QObject*, QEvent*) (this=0x7fffffffd450, receiver=0xdc7f40, e=0x27a96d0) at kernel/qapplication.cpp:3503 #10 0x00007ffff19ea425 in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7fffffffd450, receiver=0xdc7f40, event=event@entry=0x27a96d0) at kernel/qcoreapplication.cpp:935 #11 0x00007ffff19ec2bf in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x27a96d0, receiver=<optimized out>) at kernel/qcoreapplication.h:228 #12 0x00007ffff19ec2bf in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x982620) at kernel/qcoreapplication.cpp:1552 #13 0x00007ffff19ec8f8 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410 #14 0x00007ffff1a422f3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0xdc9fb0) at kernel/qeventdispatcher_glib.cpp:271 #15 0x00007fffec6c6c74 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0 #16 0x00007fffec6c6ec8 in () at /usr/lib64/libglib-2.0.so.0 #17 0x00007fffec6c6f6c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #18 0x00007ffff1a4176c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xdb0ba0, flags=...) at kernel/qeventdispatcher_glib.cpp:418 #19 0x00007ffff19e837b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffffffd2f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204 #20 0x00007ffff19efa06 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1188 #21 0x00000000004dbfe6 in main ()
I can confirm this with Qt 5.5.1 and Konversation 1.6. It also happens when changing breeze settings, like the animation duration. The backtrace is almost identical. Maybe it is related to QApplication being instantiated a bit too late? "QCoreApplication::arguments: Please instantiate the QApplication object first"
I also experience this issue. I changed Breeze settings and Konversation crashed. Qt 5.6, Konversation 1.6. Current Arch.
Created attachment 98822 [details] konversation-20160506-213430.kcrash.txt Same here, it crashes every time I switch the workspace theme.
*** Bug 351451 has been marked as a duplicate of this bug. ***
Dear Bug Submitter, This bug has been stagnant for a long time. Could you help us out and re-test if the bug is valid in the latest version? I am setting the status to NEEDSINFO pending your response, please change the Status back to REPORTED when you respond. Thank you for helping us make KDE software even better for everyone!
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!
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!