Application: kmail (5.10.1) Qt Version: 5.12.0 Frameworks Version: 5.54.0 Operating System: Linux 4.20.4-arch1-1-ARCH x86_64 Distribution (Platform): Archlinux Packages -- Information about the crash: I open kmail. The preview pane flashes constantly, and is unable to preview any emails. This appears to be a bug in qt5-webengine. I can reproduce this by browsing to any URL in Konqueror when WebEngine is used, but things show fine when using KHTML. If I attempt to close Kmail when the preview pane is flashing, I get this crash. The crash can be reproduced every time. -- Backtrace: Application: KMail (kmail), signal: Segmentation fault Using host libthread_db library "/usr/lib/libthread_db.so.1". [Current thread is 1 (Thread 0x7fcdfdebfb40 (LWP 3647))] Thread 26 (Thread 0x7fccf2350700 (LWP 3738)): #0 0x00007fce15384ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd16a in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eafd252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0eabc301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0eabe4d7 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eabeac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 25 (Thread 0x7fcdceffd700 (LWP 3737)): #0 0x00007fce15384ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd16a in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eafd252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0eabc301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0eabe806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eabeac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 24 (Thread 0x7fcd796ee700 (LWP 3704)): #0 0x00007fce15384afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0b9b728c in ?? () from /usr/lib/libQt5Script.so.5 #2 0x00007fce0b9b72a9 in ?? () from /usr/lib/libQt5Script.so.5 #3 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #4 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 23 (Thread 0x7fcda0ad3700 (LWP 3691)): #0 0x00007fce14465424 in g_mutex_unlock () from /usr/lib/libglib-2.0.so.0 #1 0x00007fce144b5faa in g_main_context_check () from /usr/lib/libglib-2.0.so.0 #2 0x00007fce144b74e6 in ?? () from /usr/lib/libglib-2.0.so.0 #3 0x00007fce144b762e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #4 0x00007fce17ee75c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007fce17e9058c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #6 0x00007fce17cd45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #7 0x00007fce17cd59cc in ?? () from /usr/lib/libQt5Core.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 22 (Thread 0x7fcda1da4700 (LWP 3688)): #0 0x00007fce15384afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc379 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd178 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eafd20f in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0eabc318 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0eabe806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eabeb44 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 21 (Thread 0x7fcda27fc700 (LWP 3682)): #0 0x00007fce15384e5b in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce14f56ea4 in ?? () from /usr/lib/nvidia/libGL.so.1 #2 0x00007fce09bca522 in ?? () from /usr/lib/nvidia/libnvidia-glcore.so.340.107 #3 0x00007fce14f56db4 in ?? () from /usr/lib/nvidia/libGL.so.1 #4 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #5 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 20 (Thread 0x7fcda2ffd700 (LWP 3681)): #0 0x00007fce179b07a4 in read () from /usr/lib/libc.so.6 #1 0x00007fce02e85782 in pa_read () from /usr/lib/pulseaudio/libpulsecommon-12.2.so #2 0x00007fce060f255f in pa_mainloop_prepare () from /usr/lib/libpulse.so.0 #3 0x00007fce060f2fd1 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0 #4 0x00007fce060f3091 in pa_mainloop_run () from /usr/lib/libpulse.so.0 #5 0x00007fce061015ae in ?? () from /usr/lib/libpulse.so.0 #6 0x00007fce02eb59fc in ?? () from /usr/lib/pulseaudio/libpulsecommon-12.2.so #7 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 19 (Thread 0x7fcda37fe700 (LWP 3680)): #0 0x00007fce179cd12b in __lll_lock_wait_private () from /usr/lib/libc.so.6 #1 0x00007fce179cef38 in __fprintf_chk () from /usr/lib/libc.so.6 #2 0x00007fce058c72f0 in event_logv_ () from /usr/lib/libevent-2.1.so.6 #3 0x00007fce058c74b7 in event_warn () from /usr/lib/libevent-2.1.so.6 #4 0x00007fce058c8ee2 in ?? () from /usr/lib/libevent-2.1.so.6 #5 0x00007fce058beac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6 #6 0x00007fce0eaffe29 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0ea9b63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce0eace608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #9 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #10 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #11 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 18 (Thread 0x7fcda3fff700 (LWP 3679)): #0 0x00007fce15384afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc379 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd178 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eafd20f in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0ea7793f in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0ea9b63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eace608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 17 (Thread 0x7fcdccff9700 (LWP 3678)): #0 0x00007fce15384ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd16a in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0ea77950 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0ea9b63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0eace608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 16 (Thread 0x7fcdcd7fa700 (LWP 3677)): #0 0x00007fce15384afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc379 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0f3d4ee8 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eace8cf in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #6 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 15 (Thread 0x7fcdcdffb700 (LWP 3676)): #0 0x00007fce15384afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc379 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd178 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eafd20f in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0eabc318 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0eabe4d7 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eabeb04 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 14 (Thread 0x7fcdce7fc700 (LWP 3675)): #0 0x00007fce179b084f in write () from /usr/lib/libc.so.6 #1 0x00007fce1794085d in _IO_file_write@@GLIBC_2.2.5 () from /usr/lib/libc.so.6 #2 0x00007fce1793fbbf in new_do_write () from /usr/lib/libc.so.6 #3 0x00007fce17940f96 in __GI__IO_file_xsputn () from /usr/lib/libc.so.6 #4 0x00007fce17917732 in buffered_vfprintf () from /usr/lib/libc.so.6 #5 0x00007fce17914c12 in vfprintf () from /usr/lib/libc.so.6 #6 0x00007fce179cef8a in __fprintf_chk () from /usr/lib/libc.so.6 #7 0x00007fce058c72f0 in event_logv_ () from /usr/lib/libevent-2.1.so.6 #8 0x00007fce058c74b7 in event_warn () from /usr/lib/libevent-2.1.so.6 #9 0x00007fce058c8ee2 in ?? () from /usr/lib/libevent-2.1.so.6 #10 0x00007fce058beac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6 #11 0x00007fce0eaffe29 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #12 0x00007fce0ea9b63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #13 0x00007fce0e44dce4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #14 0x00007fce0eace6d8 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #15 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #16 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #17 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 13 (Thread 0x7fcdcf7fe700 (LWP 3673)): #0 0x00007fce15384ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd16a in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eafd252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0eabc301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0eabe806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eabeac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 12 (Thread 0x7fcdcffff700 (LWP 3672)): #0 0x00007fce15384ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd16a in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eafd252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0eabc301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0eabe806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eabeac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 11 (Thread 0x7fcddc807700 (LWP 3671)): #0 0x00007fce15384ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce0eafc447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #2 0x00007fce0eafd16a in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #3 0x00007fce0eafd252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #4 0x00007fce0eabc301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #5 0x00007fce0eabe806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #6 0x00007fce0eabeac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 10 (Thread 0x7fcddd008700 (LWP 3670)): #0 0x00007fce178f60e2 in __dcigettext () from /usr/lib/libc.so.6 #1 0x00007fce1794d600 in strerror_r () from /usr/lib/libc.so.6 #2 0x00007fce1794d530 in strerror () from /usr/lib/libc.so.6 #3 0x00007fce058c74a3 in event_warn () from /usr/lib/libevent-2.1.so.6 #4 0x00007fce058c8ee2 in ?? () from /usr/lib/libevent-2.1.so.6 #5 0x00007fce058beac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6 #6 0x00007fce0eaffe29 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0ea9b63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce0eac0fd4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #9 0x00007fce0eace6d8 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #10 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #11 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #12 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 9 (Thread 0x7fcdde00a700 (LWP 3668)): #0 0x00007fce179cd12b in __lll_lock_wait_private () from /usr/lib/libc.so.6 #1 0x00007fce179cef38 in __fprintf_chk () from /usr/lib/libc.so.6 #2 0x00007fce058c72f0 in event_logv_ () from /usr/lib/libevent-2.1.so.6 #3 0x00007fce058c74b7 in event_warn () from /usr/lib/libevent-2.1.so.6 #4 0x00007fce058c8ee2 in ?? () from /usr/lib/libevent-2.1.so.6 #5 0x00007fce058beac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6 #6 0x00007fce0eaffe29 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0ea9b63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce0eace608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #9 0x00007fce0eaff361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #10 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #11 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 8 (Thread 0x7fcddffff700 (LWP 3658)): #0 0x00007fce179b4c21 in poll () from /usr/lib/libc.so.6 #1 0x00007fce144b7540 in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fce144b762e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007fce17ee75c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007fce17e9058c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007fce17cd45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00007fce17cd59cc in ?? () from /usr/lib/libQt5Core.so.5 #7 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 7 (Thread 0x7fcdf4e10700 (LWP 3653)): #0 0x00007fce179b4c21 in poll () from /usr/lib/libc.so.6 #1 0x00007fce144b7540 in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fce144b762e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007fce17ee75c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007fce17e9058c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007fce17cd45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00007fce17cd59cc in ?? () from /usr/lib/libQt5Core.so.5 #7 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 6 (Thread 0x7fcdf5611700 (LWP 3652)): #0 0x00007fce17ee719b in ?? () from /usr/lib/libQt5Core.so.5 #1 0x00007fce144b6e0a in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0 #2 0x00007fce144b7466 in ?? () from /usr/lib/libglib-2.0.so.0 #3 0x00007fce144b762e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #4 0x00007fce17ee75c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007fce17e9058c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #6 0x00007fce17cd45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #7 0x00007fce17cd59cc in ?? () from /usr/lib/libQt5Core.so.5 #8 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 5 (Thread 0x7fcdf5eb2700 (LWP 3651)): #0 0x00007fce179b4c21 in poll () from /usr/lib/libc.so.6 #1 0x00007fce144b7540 in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fce144b762e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007fce17ee75c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007fce17e9058c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007fce17cd45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00007fce17cd59cc in ?? () from /usr/lib/libQt5Core.so.5 #7 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 4 (Thread 0x7fcdf70c3700 (LWP 3650)): #0 0x00007fce144653b9 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0 #1 0x00007fce144b6e17 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0 #2 0x00007fce144b7466 in ?? () from /usr/lib/libglib-2.0.so.0 #3 0x00007fce144b762e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #4 0x00007fce17ee75c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007fce17e9058c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #6 0x00007fce17cd45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #7 0x00007fce174a3ba6 in ?? () from /usr/lib/libQt5DBus.so.5 #8 0x00007fce17cd59cc in ?? () from /usr/lib/libQt5Core.so.5 #9 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #10 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 3 (Thread 0x7fcdf7fff700 (LWP 3649)): #0 0x00007fce179b4c21 in poll () from /usr/lib/libc.so.6 #1 0x00007fce14295630 in ?? () from /usr/lib/libxcb.so.1 #2 0x00007fce142972db in xcb_wait_for_event () from /usr/lib/libxcb.so.1 #3 0x00007fcdfcfa096b in ?? () from /usr/lib/libQt5XcbQpa.so.5 #4 0x00007fce17cd59cc in ?? () from /usr/lib/libQt5Core.so.5 #5 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #6 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 2 (Thread 0x7fcdfdeb4700 (LWP 3648)): #0 0x00007fce15384e5b in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fce14f56ea4 in ?? () from /usr/lib/nvidia/libGL.so.1 #2 0x00007fce09bca522 in ?? () from /usr/lib/nvidia/libnvidia-glcore.so.340.107 #3 0x00007fce14f56db4 in ?? () from /usr/lib/nvidia/libGL.so.1 #4 0x00007fce1537ea9d in start_thread () from /usr/lib/libpthread.so.0 #5 0x00007fce179bfb23 in clone () from /usr/lib/libc.so.6 Thread 1 (Thread 0x7fcdfdebfb40 (LWP 3647)): [KCrash Handler] #6 0x00007fce130015a0 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #7 0x00007fce0e43ee91 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #8 0x00007fce0e43f32f in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #9 0x00007fce0e775d2f in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #10 0x00007fce0e78431a in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #11 0x00007fce0e5a0e39 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #12 0x00007fce0e5a1001 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #13 0x00007fce0e5a7be7 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #14 0x00007fce0e5a7e01 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #15 0x00007fce0e589a51 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #16 0x00007fce0e8aca58 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #17 0x00007fce0e8ad421 in ?? () from /usr/lib/libQt5WebEngineCore.so.5 #18 0x00007fce0cf2d54c in QtWebEngineCore::WebContentsAdapter::~WebContentsAdapter() () from /usr/lib/libQt5WebEngineCore.so.5 #19 0x00007fce134588c4 in ?? () from /usr/lib/libQt5WebEngineWidgets.so.5 #20 0x00007fce13458959 in ?? () from /usr/lib/libQt5WebEngineWidgets.so.5 #21 0x00007fce134543f0 in QWebEnginePage::~QWebEnginePage() () from /usr/lib/libQt5WebEngineWidgets.so.5 #22 0x00007fce16d009ca in MessageViewer::MailWebEnginePage::~MailWebEnginePage() () from /usr/lib/libKF5MessageViewer.so.5 #23 0x00007fce17eba1cb in QObjectPrivate::deleteChildren() () from /usr/lib/libQt5Core.so.5 #24 0x00007fce1889410f in QWidget::~QWidget() () from /usr/lib/libQt5Widgets.so.5 #25 0x00007fce16cff0ba in MessageViewer::MailWebEngineView::~MailWebEngineView() () from /usr/lib/libKF5MessageViewer.so.5 #26 0x00007fce16ca6946 in ?? () from /usr/lib/libKF5MessageViewer.so.5 #27 0x00007fce16ca6b09 in ?? () from /usr/lib/libKF5MessageViewer.so.5 #28 0x00007fce17eba1cb in QObjectPrivate::deleteChildren() () from /usr/lib/libQt5Core.so.5 #29 0x00007fce1889410f in QWidget::~QWidget() () from /usr/lib/libQt5Widgets.so.5 #30 0x00007fce16c9a24a in MessageViewer::Viewer::~Viewer() () from /usr/lib/libKF5MessageViewer.so.5 #31 0x00007fce17eba1cb in QObjectPrivate::deleteChildren() () from /usr/lib/libQt5Core.so.5 #32 0x00007fce1889410f in QWidget::~QWidget() () from /usr/lib/libQt5Widgets.so.5 #33 0x00007fce18fdecea in KMReaderWin::~KMReaderWin() () from /usr/lib/libkmailprivate.so.5 #34 0x00007fce17eba1cb in QObjectPrivate::deleteChildren() () from /usr/lib/libQt5Core.so.5 #35 0x00007fce1889410f in QWidget::~QWidget() () from /usr/lib/libQt5Widgets.so.5 #36 0x00007fce189ff22a in QSplitter::~QSplitter() () from /usr/lib/libQt5Widgets.so.5 #37 0x00007fce17eba1cb in QObjectPrivate::deleteChildren() () from /usr/lib/libQt5Core.so.5 #38 0x00007fce1889410f in QWidget::~QWidget() () from /usr/lib/libQt5Widgets.so.5 #39 0x00007fce189ff22a in QSplitter::~QSplitter() () from /usr/lib/libQt5Widgets.so.5 #40 0x00007fce19017033 in KMMainWidget::deleteWidgets() () from /usr/lib/libkmailprivate.so.5 #41 0x00007fce1902fd6f in KMMainWidget::destruct() () from /usr/lib/libkmailprivate.so.5 #42 0x00007fce1902ff51 in KMMainWidget::~KMMainWidget() () from /usr/lib/libkmailprivate.so.5 #43 0x00007fce1903016a in KMMainWidget::~KMMainWidget() () from /usr/lib/libkmailprivate.so.5 #44 0x00007fce17eba1cb in QObjectPrivate::deleteChildren() () from /usr/lib/libQt5Core.so.5 #45 0x00007fce1889410f in QWidget::~QWidget() () from /usr/lib/libQt5Widgets.so.5 #46 0x00007fce177b8e35 in KMainWindow::~KMainWindow() () from /usr/lib/libKF5XmlGui.so.5 #47 0x00007fce18fda83c in KMMainWin::~KMMainWin() () from /usr/lib/libkmailprivate.so.5 #48 0x00007fce18fda8aa in KMMainWin::~KMMainWin() () from /usr/lib/libkmailprivate.so.5 #49 0x00007fce17ebcb81 in QObject::event(QEvent*) () from /usr/lib/libQt5Core.so.5 #50 0x00007fce18898e8c in QWidget::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5 #51 0x00007fce189a53a5 in QMainWindow::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5 #52 0x00007fce177bb3bc in KMainWindow::event(QEvent*) () from /usr/lib/libKF5XmlGui.so.5 #53 0x00007fce17806ba6 in KXmlGuiWindow::event(QEvent*) () from /usr/lib/libKF5XmlGui.so.5 #54 0x00007fce18857e34 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #55 0x00007fce1885f671 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #56 0x00007fce17e918f9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5 #57 0x00007fce17e94998 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQt5Core.so.5 #58 0x00007fce17ee7fd4 in ?? () from /usr/lib/libQt5Core.so.5 #59 0x00007fce144b5a2f in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0 #60 0x00007fce144b75e9 in ?? () from /usr/lib/libglib-2.0.so.0 #61 0x00007fce144b762e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #62 0x00007fce17ee75a9 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #63 0x00007fce17e9058c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #64 0x00007fce17e98896 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5 #65 0x000055cd7b944f70 in ?? () #66 0x00007fce178e8223 in __libc_start_main () from /usr/lib/libc.so.6 #67 0x000055cd7b94512e in _start () [Inferior 1 (process 3647) detached] Report to https://bugs.kde.org/