LMMS crashes on launch "SIGSEGV". (Artix Linux)

[Fl0wdnb]

Bug Summary

LMMS (regardless whether the aur git, archlinux, appimage or github source) seems to be segmant faulting on Artix Linux (archlinux support package must be enabled to install program). I am running Artix Linux with MATE in case GTK vs. Qt applies to this topic.

Steps to reproduce

Terminal output from running the command "lmms" (without root).

Expected behavior

LMMS is supposed to launch and run properly

Actual behavior

LMMS has decided to segfault for some unknown reason

Affected LMMS versions

Current (Github/AUR/Archlinux stable + testing versions as of 12/17/2022). Installed version: LMMS 1.3.0-alpha.1.237+g17aa7dbef, however the issue is still present in the current stable version as well)

GDB Logs

(gdb) thread apply all backtrace

Thread 23 (Thread 0x7fffdcf996c0 (LWP 27110) "AudioEngine::fi"):
#0 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007ffff62e053c in QtLinuxFutex::_q_futex(int*, int, int, unsigned long long, int*, int) (val3=0, addr2=0x0, val2=0, val=, op=0, addr=, addr=, op=, val=, val2=, addr2=, val3=) at thread/qfutex_p.h:114
#2 QtLinuxFutex::futexWait<QBasicAtomicInteger >(QBasicAtomicInteger&, QBasicAtomicInteger::Type) (expectedValue=, futex=) at thread/qfutex_p.h:133
#3 futexSemaphoreTryAcquire_loop(QBasicAtomicInteger&, unsigned long long, unsigned long long, int) (timeout=-1, nn=8589934593, curValue=, u=...) at thread/qsemaphore.cpp:219
#4 futexSemaphoreTryAcquire(QBasicAtomicInteger&, int, int) (timeout=-1, n=, u=...) at thread/qsemaphore.cpp:262
#5 QSemaphore::acquire(int) (this=0x5555565c9798, n=) at thread/qsemaphore.cpp:326
#6 0x00005555556c3e94 in lmms::AudioEngine::fifoWriter::write(std::array<float, 2ul>) ()
#7 0x00005555556c4e71 in lmms::AudioEngine::fifoWriter::run() ()
#8 0x00007ffff62e42da in QThreadPrivate::start(void) (arg=0x555556a0b4d0) at thread/qthread_unix.cpp:330
#9 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#10 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 22 (Thread 0x7fffdd9fe6c0 (LWP 27109) "lmms::MidiAlsaS"):
#0 0x00007ffff5d140bf in __GI___poll (fds=0x7fff840029e0, nfds=2, timeout=250) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00005555557b3974 in lmms::MidiAlsaSeq::run() ()
#2 0x00007ffff62e42da in QThreadPrivate::start(void*) (arg=0x555556989a40) at thread/qthread_unix.cpp:330
#3 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#4 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
--Type for more, q to quit, c to continue without paging--

Thread 21 (Thread 0x7fffde1ff6c0 (LWP 27107) "SDLAudioC3"):
#0 0x00007ffff5d141b6 in __ppoll (fds=0x555556a53e50, nfds=3, timeout=, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:42
#1 0x00007ffff7f0b4f3 in ppoll (__ss=0x0, __timeout=, __nfds=, __fds=) at /usr/include/bits/poll2.h:64
#2 pa_mainloop_poll (m=m@entry=0x555556a4eaf0) at ../pulseaudio/src/pulse/mainloop.c:871
#3 0x00007ffff7f1542c in pa_mainloop_iterate (m=0x555556a4eaf0, block=, retval=0x0) at ../pulseaudio/src/pulse/mainloop.c:945
#4 0x00007ffff763737f in () at /usr/lib/libSDL2-2.0.so.0
#5 0x00007ffff7573dd8 in () at /usr/lib/libSDL2-2.0.so.0
#6 0x00007ffff767d48b in () at /usr/lib/libSDL2-2.0.so.0
#7 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#8 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 20 (Thread 0x7fffeaffd6c0 (LWP 27100) "SDLAudioP2"):
#0 0x00007ffff5d141b6 in __ppoll (fds=0x555556a42600, nfds=3, timeout=, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:42
#1 0x00007ffff7f0b4f3 in ppoll (__ss=0x0, __timeout=, __nfds=, __fds=) at /usr/include/bits/poll2.h:64
#2 pa_mainloop_poll (m=m@entry=0x555556a40a60) at ../pulseaudio/src/pulse/mainloop.c:871
#3 0x00007ffff7f1542c in pa_mainloop_iterate (m=0x555556a40a60, block=, retval=0x0) at ../pulseaudio/src/pulse/mainloop.c:945
#4 0x00007ffff76371a9 in () at /usr/lib/libSDL2-2.0.so.0
#5 0x00007ffff757341d in () at /usr/lib/libSDL2-2.0.so.0
#6 0x00007ffff767d48b in () at /usr/lib/libSDL2-2.0.so.0
#7 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#8 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

--Type for more, q to quit, c to continue without paging--
Thread 19 (Thread 0x7fffe81066c0 (LWP 27099) "PulseHotplug"):
#0 0x00007ffff5d141b6 in __ppoll (fds=0x555556a3a270, nfds=3, timeout=, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:42
#1 0x00007ffff7f0b4f3 in ppoll (__ss=0x0, __timeout=, __nfds=, __fds=) at /usr/include/bits/poll2.h:64
#2 pa_mainloop_poll (m=m@entry=0x55555698cac0) at ../pulseaudio/src/pulse/mainloop.c:871
#3 0x00007ffff7f1542c in pa_mainloop_iterate (m=m@entry=0x55555698cac0, block=block@entry=1, retval=retval@entry=0x0) at ../pulseaudio/src/pulse/mainloop.c:945
#4 0x00007ffff7f154e1 in pa_mainloop_run (m=0x55555698cac0, retval=0x0) at ../pulseaudio/src/pulse/mainloop.c:963
#5 0x00007ffff7637ff3 in () at /usr/lib/libSDL2-2.0.so.0
#6 0x00007ffff767d48b in () at /usr/lib/libSDL2-2.0.so.0
#7 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#8 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 18 (Thread 0x7fffebfff6c0 (LWP 27098) "lmms::AudioEngi"):
#0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x55555674d054) at futex-internal.c:57
#1 __futex_abstimed_wait_common (futex_word=futex_word@entry=0x55555674d054, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2 0x00007ffff5c9c51f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55555674d054, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3 0x00007ffff5c9ecd0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55555674d000, cond=0x55555674d028) at pthread_cond_wait.c:503
#4 ___pthread_cond_wait (cond=0x55555674d028, mutex=0x55555674d000) at pthread_cond_wait.c:618
#5 0x00007ffff62eb764 in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55555674d000) at thread/qwaitcondition_unix.cpp:146
#6 QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=, mutex=0x7fffebffed40, deadline=...) at thread/qwaitcondition_unix.cpp:225
#7 0x00005555556c7e94 in lmms::AudioEngineWorkerThread::run() ()
#8 0x00007ffff62e42da in QThreadPrivate::start(void*) (arg=0x7fffe4008100) at thread/qthread_unix.cpp:330
--Type for more, q to quit, c to continue without paging--
#9 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#10 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 17 (Thread 0x7fffdffff6c0 (LWP 27097) "lmms::AudioEngi"):
#0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x55555674d054) at futex-internal.c:57
#1 __futex_abstimed_wait_common (futex_word=futex_word@entry=0x55555674d054, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2 0x00007ffff5c9c51f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55555674d054, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3 0x00007ffff5c9ecd0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55555674d000, cond=0x55555674d028) at pthread_cond_wait.c:503
#4 ___pthread_cond_wait (cond=0x55555674d028, mutex=0x55555674d000) at pthread_cond_wait.c:618
#5 0x00007ffff62eb764 in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55555674d000) at thread/qwaitcondition_unix.cpp:146
#6 QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=, mutex=0x7fffdfffed40, deadline=...) at thread/qwaitcondition_unix.cpp:225
#7 0x00005555556c7e94 in lmms::AudioEngineWorkerThread::run() ()
#8 0x00007ffff62e42da in QThreadPrivate::start(void*) (arg=0x7fffe4006540) at thread/qthread_unix.cpp:330
#9 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#10 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 16 (Thread 0x7fffdf7fe6c0 (LWP 27096) "lmms::AudioEngi"):
#0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x55555674d054) at futex-internal.c:57
#1 __futex_abstimed_wait_common (futex_word=futex_word@entry=0x55555674d054, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2 0x00007ffff5c9c51f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55555674d054, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@ent--Type for more, q to quit, c to continue without paging--
ry=0x0, private=private@entry=0) at futex-internal.c:139
#3 0x00007ffff5c9ecd0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55555674d000, cond=0x55555674d028) at pthread_cond_wait.c:503
#4 ___pthread_cond_wait (cond=0x55555674d028, mutex=0x55555674d000) at pthread_cond_wait.c:618
#5 0x00007ffff62eb764 in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55555674d000) at thread/qwaitcondition_unix.cpp:146
#6 QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=, mutex=0x7fffdf7fdd40, deadline=...) at thread/qwaitcondition_unix.cpp:225
#7 0x00005555556c7e94 in lmms::AudioEngineWorkerThread::run() ()
#8 0x00007ffff62e42da in QThreadPrivate::start(void*) (arg=0x5555566b9810) at thread/qthread_unix.cpp:330
#9 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#10 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 11 (Thread 0x7fffeb7fe6c0 (LWP 27091) "lmms:disk$0"):
#0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x5555566b7728) at futex-internal.c:57
#1 __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5555566b7728, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2 0x00007ffff5c9c51f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5555566b7728, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3 0x00007ffff5c9ecd0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5555566b76d8, cond=0x5555566b7700) at pthread_cond_wait.c:503
#4 ___pthread_cond_wait (cond=0x5555566b7700, mutex=0x5555566b76d8) at pthread_cond_wait.c:618
#5 0x00007fffe8d0799e in cnd_wait () at ../mesa-22.2.3/src/c11/impl/threads_posix.c:135
#6 0x00007fffe8cbaf8c in util_queue_thread_func () at ../mesa-22.2.3/src/util/u_queue.c:287
#7 0x00007fffe8d078cc in impl_thrd_routine () at ../mesa-22.2.3/src/c11/impl/threads_posix.c:67
#8 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#9 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
--Type for more, q to quit, c to continue without paging--

Thread 3 (Thread 0x7ffff1b166c0 (LWP 27082) "QXcbEventQueue"):
#0 0x00007ffff5d140bf in __GI___poll (fds=fds@entry=0x7ffff1b15c48, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007ffff596226b in poll (__timeout=-1, __nfds=1, __fds=0x7ffff1b15c48) at /usr/include/bits/poll2.h:39
#2 _xcb_conn_wait (c=0x55555620c3a0, vector=0x0, count=0x0, cond=) at /usr/src/debug/libxcb/libxcb-1.15/src/xcb_conn.c:508
#3 0x00007ffff5963d1d in _xcb_conn_wait (count=0x0, vector=0x0, cond=0x55555620c3e0, c=0x55555620c3a0) at /usr/src/debug/libxcb/libxcb-1.15/src/xcb_conn.c:474
#4 xcb_wait_for_event (c=0x55555620c3a0) at /usr/src/debug/libxcb/libxcb-1.15/src/xcb_in.c:703
#5 0x00007ffff252d092 in QXcbEventQueue::run() (this=0x5555562094d0) at /usr/src/debug/qt5-base/qtbase/src/plugins/platforms/xcb/qxcbeventqueue.cpp:228
#6 0x00007ffff62e42da in QThreadPrivate::start(void*) (arg=0x5555562094d0) at thread/qthread_unix.cpp:330
#7 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#8 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 2 (Thread 0x7ffff23176c0 (LWP 27081) "QDBusConnection"):
#0 0x00007ffff5d140bf in __GI___poll (fds=0x7fffec0053e0, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007ffff556d1ff in g_main_context_poll (priority=, n_fds=3, fds=0x7fffec0053e0, timeout=, context=0x7fffec001cf0) at ../glib/glib/gmain.c:4543
#2 g_main_context_iterate.constprop.0 (context=0x7fffec001cf0, block=1, dispatch=1, self=) at ../glib/glib/gmain.c:4233
#3 0x00007ffff5515132 in g_main_context_iteration (context=0x7fffec001cf0, may_block=1) at ../glib/glib/gmain.c:4303
#4 0x00007ffff64d820c in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) (this=0x7fffec000b70, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5 0x00007ffff6485d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) (this=0x7ffff2316d10, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#6 0x00007ffff62e71ff in QThread::exec() (this=this@entry=0x7ffff247c560 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7 0x00007ffff2420cba in QDBusConnectionManager::run() (this=0x7ffff247c560 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at /usr/src/debug/qt5-base/qtbase/src/dbus/qdbusconnection.cpp:179
--Type for more, q to quit, c to continue without paging--
#8 0x00007ffff62e42da in QThreadPrivate::start(void*) (arg=0x7ffff247c560 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:330
#9 0x00007ffff5c9f8fd in start_thread (arg=) at pthread_create.c:442
#10 0x00007ffff5d21a60 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 1 (Thread 0x7ffff4e19cc0 (LWP 27039) "lmms"):
#0 0x00007ffff648d0bb in QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject*, QEvent*) (this=this@entry=0x5555561f6b40, receiver=receiver@entry=0x555556795e70, event=event@entry=0x7fffffffd4a0) at kernel/qcoreapplication.cpp:1172
#1 0x00007ffff7978b5a in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=0x5555561f6b40, receiver=0x555556795e70, e=0x7fffffffd4a0) at kernel/qapplication.cpp:3608
#2 0x00007ffff648d578 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x555556795e70, event=0x7fffffffd4a0) at kernel/qcoreapplication.cpp:1064
#3 0x00007ffff79a53fa in QWidgetPrivate::setStyle_helper(QStyle*, bool) (this=, newStyle=0x0, propagate=) at kernel/qwidget.cpp:2659
#4 0x00007ffff79b0405 in QWidget::setParent(QWidget*, QFlagsQt::WindowType) (this=0x555556795e70, parent=, f=...) at kernel/qwidget.cpp:10501
#5 0x00007ffff799d19a in QWidgetPrivate::init(QWidget*, QFlagsQt::WindowType) (this=0x55555673ff00, parentWidget=, f=...) at kernel/qwidget.cpp:1046
#6 0x00005555557eb937 in lmms::gui::MainWindow::MainWindow() ()
#7 0x00005555557db4e1 in lmms::gui::GuiApplication::GuiApplication() ()
#8 0x000055555568b2bb in main ()
(gdb)

[RiedleroD]

possibly duplicate of #6587, have you tried the workaround from there?

[Fl0wdnb]

I can confirm that was the issue. I have downgraded kwidgetsaddons to the current artix version and all is working again. (downgrading package kwidgetsaddons (5.101.0-1 => 5.92.0-1)