SUMMARY System Settings crashes when trying to access Application Style settings STEPS TO REPRODUCE 1. Open System Settings 2. Click Application Style 3. System Settings will then crash OBSERVED RESULT System Settings will crash every time. EXPECTED RESULT The Application Style section of System Settings should open. SOFTWARE/OS VERSIONS Operating System: Antergos Linux KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.69.0 Qt Version: 5.14.2 Kernel Version: 5.6.10-arch1-1 OS Type: 64-bit Processors: 8 × AMD FX(tm)-8350 Eight-Core Processor Memory: 15.5 GiB of RAM ADDITIONAL INFORMATION systemsettings5[722655]: Cannot mix incompatible Qt library (version 0x50c02) with this library (version 0x50e02) kernel: audit: type=1701 audit(1588720114.571:268): auid=1000 uid=1000 gid=985 ses=2 pid=722655 comm="systemsettings5" exe="/usr/bin/systemsettings5" sig=6 res=1 audit: AUDIT1334 prog-id=37 op=LOAD kernel: audit: type=1334 audit(1588720114.585:269): prog-id=37 op=LOAD kernel: audit: type=1334 audit(1588720114.585:270): prog-id=38 op=LOAD audit: AUDIT1334 prog-id=38 op=LOAD systemd[1]: Started Process Core Dump (PID 722686/UID 0). audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@11-722686-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' kernel: audit: type=1130 audit(1588720114.585:271): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@11-722686-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' kwin_x11[1283]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 8936, resource id: 115343366, major code: 15 (QueryTree), minor code: 0 kwin_x11[1283]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 8941, resource id: 115343366, major code: 18 (ChangeProperty), minor code: 0 kwin_x11[1283]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 8978, resource id: 46137559, major code: 18 (ChangeProperty), minor code: 0 systemd-coredump[722689]: Process 722655 (systemsettings5) of user 1000 dumped core. Stack trace of thread 722655: #0 0x00007f6c3cb53ce5 raise (libc.so.6 + 0x3bce5) #1 0x00007f6c3cb3d857 abort (libc.so.6 + 0x25857) #2 0x00007f6c3cf5e938 _ZNK14QMessageLogger5fatalEPKcz (libQt5Core.so.5 + 0x8e938) #3 0x00007f6c3cf73860 n/a (libQt5Core.so.5 + 0xa3860) #4 0x00007f6c2087bf3f n/a (libqgtk2style.so + 0x23f3f) #5 0x00007f6c2086a5f0 n/a (libqgtk2style.so + 0x125f0) #6 0x00007f6c2087eb00 n/a (libqgtk2style.so + 0x26b00) #7 0x00007f6c3dd31cae _ZN13QStyleFactory6createERK7QString (libQt5Widgets.so.5 + 0x1d1cae) #8 0x00007f6c227970e3 n/a (kcm_style.so + 0x370e3) #9 0x00007f6c3c1d97ed _ZN17QQmlObjectCreator8finalizeER26QQmlInstantiationInterrupt (libQt5Qml.so.5 + 0x3017ed) #10 0x00007f6c3c16201b n/a (libQt5Qml.so.5 + 0x28a01b) #11 0x00007f6c3c162563 _ZN17QQmlEnginePrivate8incubateER13QQmlIncubatorP15QQmlContextData (libQt5Qml.so.5 + 0x28a563) #12 0x00007f6c3a86b270 n/a (libQt5QmlModels.so.5 + 0x6b270) #13 0x00007f6c3a86b415 _ZN17QQmlDelegateModel6objectEiN13QQmlIncubator14IncubationModeE (libQt5QmlModels.so.5 + 0x6b415) #14 0x00007f6c3c6bc4f6 n/a (libQt5Quick.so.5 + 0x35c4f6) #15 0x00007f6c3c6afdee n/a (libQt5Quick.so.5 + 0x34fdee) #16 0x00007f6c3c6bd854 n/a (libQt5Quick.so.5 + 0x35d854) #17 0x00007f6c3c6c08f1 n/a (libQt5Quick.so.5 + 0x3608f1) #18 0x00007f6c3c6c0a9d _ZN14QQuickItemView12modelUpdatedERK13QQmlChangeSetb (libQt5Quick.so.5 + 0x360a9d) #19 0x00007f6c3c6c1d5d n/a (libQt5Quick.so.5 + 0x361d5d) #20 0x00007f6c3d1aad10 n/a (libQt5Core.so.5 + 0x2dad10) #21 0x00007f6c3a82bc47 _ZN17QQmlInstanceModel12modelUpdatedERK13QQmlChangeSetb (libQt5QmlModels.so.5 + 0x2bc47) #22 0x00007f6c3a860bf9 n/a (libQt5QmlModels.so.5 + 0x60bf9) #23 0x00007f6c3a8677ea n/a (libQt5QmlModels.so.5 + 0x677ea) #24 0x00007f6c3a867c08 n/a (libQt5QmlModels.so.5 + 0x67c08) #25 0x00007f6c3a871cca _ZN17QQmlDelegateModel13_q_modelResetEv (libQt5QmlModels.so.5 + 0x71cca) #26 0x00007f6c3a872256 n/a (libQt5QmlModels.so.5 + 0x72256) #27 0x00007f6c3a872623 _ZN17QQmlDelegateModel11qt_metacallEN11QMetaObject4CallEiPPv (libQt5QmlModels.so.5 + 0x72623) #28 0x00007f6c3d1aaa22 n/a (libQt5Core.so.5 + 0x2daa22) #29 0x00007f6c3d118cee _ZN18QAbstractItemModel10modelResetENS_14QPrivateSignalE (libQt5Core.so.5 + 0x248cee) #30 0x00007f6c2278acd2 n/a (kcm_style.so + 0x2acd2) #31 0x00007f6c227855f6 n/a (kcm_style.so + 0x255f6) #32 0x00007f6c3e888362 n/a (libKF5KCMUtils.so.5 + 0x20362) #33 0x00007f6c3e888669 n/a (libKF5KCMUtils.so.5 + 0x20669) #34 0x00007f6c3d1a2ada _ZN7QObject5eventEP6QEvent (libQt5Core.so.5 + 0x2d2ada) #35 0x00007f6c3dcff299 _ZN7QWidget5eventEP6QEvent (libQt5Widgets.so.5 + 0x19f299) #36 0x00007f6c3e88a3ca n/a (libKF5KCMUtils.so.5 + 0x223ca) #37 0x00007f6c3dcbb352 _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5 + 0x15b352) #38 0x00007f6c3dcc4829 _ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5 + 0x164829) #39 0x00007f6c3d1754f2 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 + 0x2a54f2) #40 0x00007f6c3d177d56 _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData (libQt5Core.so.5 + 0x2a7d56) #41 0x00007f6c3d1ce244 n/a (libQt5Core.so.5 + 0x2fe244) #42 0x00007f6c3ab3b6be g_main_context_dispatch (libglib-2.0.so.0 + 0x6b6be) #43 0x00007f6c3ab3d531 n/a (libglib-2.0.so.0 + 0x6d531) #44 0x00007f6c3ab3d571 g_main_context_iteration (libglib-2.0.so.0 + 0x6d571) #45 0x00007f6c3d1cd890 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2fd890) #46 0x00007f6c3d17405c _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a405c) #47 0x00007f6c3d17c066 _ZN16QCoreApplication4execEv (libQt5Core.so.5 + 0x2ac066) #48 0x000055c3e0fde46c n/a (systemsettings5 + 0xb46c) #49 0x00007f6c3cb3f023 __libc_start_main (libc.so.6 + 0x27023) #50 0x000055c3e0fde4fe _start (systemsettings5 + 0xb4fe) Stack trace of thread 722658: #0 0x00007f6c3cc0cabf __poll (libc.so.6 + 0xf4abf) #1 0x00007f6c3ab3d4a0 n/a (libglib-2.0.so.0 + 0x6d4a0) #2 0x00007f6c3ab3d571 g_main_context_iteration (libglib-2.0.so.0 + 0x6d571) #3 0x00007f6c3d1cd890 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2fd890) #4 0x00007f6c3d17405c _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a405c) #5 0x00007f6c3cf98c62 _ZN7QThread4execEv (libQt5Core.so.5 + 0xc8c62) #6 0x00007f6c3d425b28 n/a (libQt5DBus.so.5 + 0x15b28) #7 0x00007f6c3cf99dd6 n/a (libQt5Core.so.5 + 0xc9dd6) #8 0x00007f6c3b79946f start_thread (libpthread.so.0 + 0x946f) #9 0x00007f6c3cc173d3 __clone (libc.so.6 + 0xff3d3) Stack trace of thread 722657: #0 0x00007f6c3cc0cabf __poll (libc.so.6 + 0xf4abf) #1 0x00007f6c3b74c63b n/a (libxcb.so.1 + 0xc63b) #2 0x00007f6c3b74e37b xcb_wait_for_event (libxcb.so.1 + 0xe37b) #3 0x00007f6c37f45e01 n/a (libQt5XcbQpa.so.5 + 0x65e01) #4 0x00007f6c3cf99dd6 n/a (libQt5Core.so.5 + 0xc9dd6) #5 0x00007f6c3b79946f start_thread (libpthread.so.0 + 0x946f) #6 0x00007f6c3cc173d3 __clone (libc.so.6 + 0xff3d3) Stack trace of thread 722660: #0 0x00007f6c3cc0cabf __poll (libc.so.6 + 0xf4abf) #1 0x00007f6c3ab3d4a0 n/a (libglib-2.0.so.0 + 0x6d4a0) #2 0x00007f6c3ab3d571 g_main_context_iteration (libglib-2.0.so.0 + 0x6d571) #3 0x00007f6c3d1cd890 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2fd890) #4 0x00007f6c3d17405c _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a405c) #5 0x00007f6c3cf98c62 _ZN7QThread4execEv (libQt5Core.so.5 + 0xc8c62) #6 0x00007f6c3c20a389 n/a (libQt5Qml.so.5 + 0x332389) #7 0x00007f6c3cf99dd6 n/a (libQt5Core.so.5 + 0xc9dd6) #8 0x00007f6c3b79946f start_thread (libpthread.so.0 + 0x946f) #9 0x00007f6c3cc173d3 __clone (libc.so.6 + 0xff3d3) Stack trace of thread 722659: #0 0x00007f6c3cc0cabf __poll (libc.so.6 + 0xf4abf) #1 0x00007f6c3ab3d4a0 n/a (libglib-2.0.so.0 + 0x6d4a0) #2 0x00007f6c3ab3d571 g_main_context_iteration (libglib-2.0.so.0 + 0x6d571) #3 0x00007f6c3d1cd890 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2fd890) #4 0x00007f6c3d17405c _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a405c) #5 0x00007f6c3cf98c62 _ZN7QThread4execEv (libQt5Core.so.5 + 0xc8c62) #6 0x00007f6c3c20a389 n/a (libQt5Qml.so.5 + 0x332389) #7 0x00007f6c3cf99dd6 n/a (libQt5Core.so.5 + 0xc9dd6) #8 0x00007f6c3b79946f start_thread (libpthread.so.0 + 0x946f) #9 0x00007f6c3cc173d3 __clone (libc.so.6 + 0xff3d3) Stack trace of thread 722684: #0 0x00007f6c3cc0cabf __poll (libc.so.6 + 0xf4abf) #1 0x00007f6c3ab3d4a0 n/a (libglib-2.0.so.0 + 0x6d4a0) #2 0x00007f6c3ab3d571 g_main_context_iteration (libglib-2.0.so.0 + 0x6d571) #3 0x00007f6c3d1cd890 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2fd890) #4 0x00007f6c3d17405c _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a405c) #5 0x00007f6c3cf98c62 _ZN7QThread4execEv (libQt5Core.so.5 + 0xc8c62) #6 0x00007f6c3c20a389 n/a (libQt5Qml.so.5 + 0x332389) #7 0x00007f6c3cf99dd6 n/a (libQt5Core.so.5 + 0xc9dd6) #8 0x00007f6c3b79946f start_thread (libpthread.so.0 + 0x946f) #9 0x00007f6c3cc173d3 __clone (libc.so.6 + 0xff3d3)
Rebuild your styles. Likely you're using some 3rd party style that wasn't rebuilt when your Qt version updated. Please report this to your distribution.