segmentation fault in kvantum 1.0.8-1

[mockxe]

overview

After upgrading to kvantum 1.0.8-1 I experienced crashes of different applications.

system info

arch linux, kernel 6.1.10-arch1-1
xorg-server 21.1.7-1
plasma 5.26.5-1
plasma-framework 5.102.0-1
qt5-base 5.15.8+kde+r181-1
qt6-base 6.4.2-1
kvantum 1.0.8-1
kvantum-themes: Sweet KDE, Monochrome KDE (other, built-in themes seemed not to cause any crashes)

affected applications

• KDE Plasma System Settings
• libreoffice
• cool-retro-term

steps-to-reproduce

System settings

• 1. open system settings
• 2. navigate to applications > Default Applications --> crash

libreoffice

• 1. start libreoffice (launcer, not any specific program like calc / writer)
• 2. open Tools > Options --> crash

OR

• 2. create new (calc / writer) document --> crash

cool-retro-term

• 1. start cool-retro-term
• 2. rightclick > edit > settings
• 3. select tab "Terminal" --> crash

details

I started all programs with gdb and found this:

Thread 1 "systemsettings" received signal SIGSEGV, Segmentation fault.
0x00007fffe80d5de1 in Kvantum::Style::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*) const () from /usr/lib/qt/plugins/styles/libkvantum.so

Thread 1 "soffice.bin" received signal SIGSEGV, Segmentation fault.
0x00007fffe3f80de1 in Kvantum::Style::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*) const () from /usr/lib/qt/plugins/styles/libkvantum.so

Thread 1 "cool-retro-term" received signal SIGSEGV, Segmentation fault.
0x00007fffe80d5de1 in Kvantum::Style::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*) const () from /usr/lib/qt/plugins/styles/libkvantum.so

here is the complete steps + backtrace

$ gdb cool-retro-term
[...]
(gdb) run
[reproducing the steps mentioned above]

Thread 1 "cool-retro-term" received signal SIGSEGV, Segmentation fault.
0x00007fffe80d5de1 in Kvantum::Style::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*) const () from /usr/lib/qt/plugins/styles/libkvantum.so                              

(gdb) backtrace
#0  0x00007fffe80d5de1 in Kvantum::Style::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*) const () from /usr/lib/qt/plugins/styles/libkvantum.so                          
#1  0x00007fffd512154a in ?? ()
   from /usr/lib/qt/qml/org/kde/qqc2desktopstyle/private/libqqc2desktopstyleplugin.so
#2  0x00007ffff104746a in QQuickWindowPrivate::polishItems() () from /usr/lib/libQt5Quick.so.5
#3  0x00007ffff100233b in ?? () from /usr/lib/libQt5Quick.so.5
#4  0x00007ffff1052739 in QQuickWindow::event(QEvent*) () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff7978b5c in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /usr/lib/libQt5Widgets.so.5
#6  0x00007ffff668df48 in QCoreApplication::notifyInternal2(QObject*, QEvent*) ()
   from /usr/lib/libQt5Core.so.5
#7  0x00007ffff7133488 in QPlatformWindow::windowEvent(QEvent*) () from /usr/lib/libQt5Gui.so.5
#8  0x00007ffff797d041 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#9  0x00007ffff668df48 in QCoreApplication::notifyInternal2(QObject*, QEvent*) ()
   from /usr/lib/libQt5Core.so.5
#10 0x00007ffff66d84b3 in QTimerInfoList::activateTimers() () from /usr/lib/libQt5Core.so.5
#11 0x00007ffff66d8af2 in ?? () from /usr/lib/libQt5Core.so.5
#12 0x00007ffff591682b in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#13 0x00007ffff596dcc9 in ?? () from /usr/lib/libglib-2.0.so.0
#14 0x00007ffff59150e2 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#15 0x00007ffff66d8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQt5Core.so.5
#16 0x00007ffff66866ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQt5Core.so.5
#17 0x00007ffff6691219 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#18 0x000055555555789e in ?? ()
#19 0x00007ffff6e3c790 in ?? () from /usr/lib/libc.so.6
#20 0x00007ffff6e3c84a in __libc_start_main () from /usr/lib/libc.so.6
#21 0x0000555555558165 in ?? ()

possible workaround:

I temporarily downgrade to kvantum 1.0.7-1 and cannot reproduce the errors with it.

---

I hope the provided information helps, please tell me if you need anything else.

[simonbcn]

Same problem: https://bugs.archlinux.org/task/77453

[xfzv]

Can confirm, I keep getting core dump crash in various System Settings sections. Downgrading to kvantum 1.0.7-1 fixes the issue for me.

[tsujan]

Thanks for the report, and sorry for the inconvenience!

Yes, it was a nasty regression that showed up when the widget animation was disabled. It's fixed in 990763d.

Before I release 1.0.9, please confirm that the latest commit fixes the problem.

[xfzv]

@tsujan updating to kvantum 1.0.8-2 on Arch Linux fixed the issue for me.

[mockxe]

I can confirm it is working when built from the latest sources.

Please see my attached screenshot where I opened the System Settings page which previously caused a crash:

Thanks for the fast fix!

[tsujan]

Thanks for the confirmations!

I'll double-check the code and add a workaround for a rare problem before releasing 1.0.9.

[tsujan]

1.0.9 has been released.