Public bug reported:

Release: Kubuntu Mantic Minotaur / 23.10
Package: Okular 4:23.08.1-0ubuntu1

What is expected to happen:
Using Okular Save/Save As function, the pdf file is saved to selected target 
directory/file.

What happens instead:
If the target location is in btrfs formated file system, okular fails to save 
the pdf file and crashes.

Steps to reproduce:
Download kubuntu-23.10-desktop-amd64.iso from kubuntu.org home-page;
Install the OS using the iso and set up the following partitions:
*) ext4 as / (root)
*) btrfs as /home
Open any pdf file and attempt to save it anywhere under /home.

Additional notes:
If /home is formatted using ext4, bug is not present. Save process is completed 
normally. 
gdb backtrace is attached to the report and below

Thread 19 (Thread 0x7fffcaffd6c0 (LWP 3825) "KIO::WorkerThre"):
#0  KMountPoint::mountType (this=0x0) at 
/usr/src/kio-5.110.0-0ubuntu1/src/core/kmountpoint.cpp:411
No locals.
#1  0x00007fffb87af2de in isOnCifsMount (filePath=...) at 
/usr/include/x86_64-linux-gnu/qt5/QtCore/qshareddata.h:161
        mount = {d = 0x0}
        mount = <optimised out>
#2  FileProtocol::copy (this=0x7fffbc030fb0, srcUrl=..., destUrl=..., _mode=-1, 
_flags=...) at /usr/src/kio-5.110.0-0ubuntu1/src/ioslaves/file/file_unix.cpp:743
        src = {d = 0x7fffbc0300b0}
        dest = {d = 0x7fffbc03edf0}
        _src = {d = 0x7fffbc04f6d0}
        _dest = {d = 0x7fffbc03b910}
        _destBackup = {d = 0x7ffff65c7800 <QArrayData::shared_null>}
        buffSrc = {st_dev = 66306, st_ino = 7602217, st_nlink = 1, st_mode = 
33204, st_uid = 1000, st_gid = 1000, __pad0 = 0, st_rdev = 0, st_size = 78711, 
st_blksize = 4096, st_blocks = 160, st_atim = {tv_sec = 1706194707, tv_nsec = 
914074484}, st_mtim = {tv_sec = 1706194707, tv_nsec = 918074462}, st_ctim = 
{tv_sec = 1706194707, tv_nsec = 918074462}, __glibc_reserved = {0, 0, 0}}
        buffDest = {st_dev = 41, st_ino = 5344914, st_nlink = 1, st_mode = 
33204, st_uid = 1000, st_gid = 1000, __pad0 = 0, st_rdev = 0, st_size = 77998, 
st_blksize = 4096, st_blocks = 160, st_atim = {tv_sec = 1706175872, tv_nsec = 
817533977}, st_mtim = {tv_sec = 1705066650, tv_nsec = 703095848}, st_ctim = 
{tv_sec = 1705066650, tv_nsec = 731094634}, __glibc_reserved = {0, 0, 0}}
        dest_exists = <optimised out>
        srcFile = {<QFileDevice> = {<QIODevice> = {<QObject> = {_vptr.QObject = 
0x7fffbc04f6d0, static staticMetaObject = {d = {superdata = {direct = 0x0}, 
stringdata = 0x7ffff66a49c0 <qt_meta_stringdata_QObject>, data = 0x7ffff66a48a0 
<qt_meta_data_QObject>, static_metacall = 0x7ffff6504150 
<QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x0}, static 
staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 
0x7ffff66a7960 <qt_meta_stringdata_Qt>, data = 0x7ffff66a4ae0 
<qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 
0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7ffff6768180 
<QObject::staticMetaObject>}, stringdata = 0x7ffff6694040 
<qt_meta_stringdata_QIODevice>, data = 0x7ffff6693f40 <qt_meta_data_QIODevice>, 
static_metacall = 0x7ffff63f6280 <QIODevice::qt_static_metacall(QObject*, 
QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, 
static staticMetaObject = {d = {superdata = {direct = 0x7ffff676d960 
<QIODevice::staticMetaObject>}, stringdata = 0x7ffff6693ee0 
<qt_meta_stringdata_QFileDevice>, data = 0x7ffff6693ea0 
<qt_meta_data_QFileDevice>, static_metacall = 0x7ffff63eea30 
<QFileDevice::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = 
{superdata = {direct = 0x7ffff676d7c0 <QFileDevice::staticMetaObject>}, 
stringdata = 0x7ffff6693e40 <qt_meta_stringdata_QFile>, data = 0x7ffff6693e00 
<qt_meta_data_QFile>, static_metacall = 0x7ffff63eb730 
<QFile::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}}
        destFile = {<QFileDevice> = {<QIODevice> = {<QObject> = {_vptr.QObject 
= 0x7fffbc050b50, static staticMetaObject = {d = {superdata = {direct = 0x0}, 
stringdata = 0x7ffff66a49c0 <qt_meta_stringdata_QObject>, data = 0x7ffff66a48a0 
<qt_meta_data_QObject>, static_metacall = 0x7ffff6504150 
<QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x0}, static 
staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 
0x7ffff66a7960 <qt_meta_stringdata_Qt>, data = 0x7ffff66a4ae0 
<qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 
0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7ffff6768180 
<QObject::staticMetaObject>}, stringdata = 0x7ffff6694040 
<qt_meta_stringdata_QIODevice>, data = 0x7ffff6693f40 <qt_meta_data_QIODevice>, 
static_metacall = 0x7ffff63f6280 <QIODevice::qt_static_metacall(QObject*, 
QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, 
static staticMetaObject = {d = {superdata = {direct = 0x7ffff676d960 
<QIODevice::staticMetaObject>}, stringdata = 0x7ffff6693ee0 
<qt_meta_stringdata_QFileDevice>, data = 0x7ffff6693ea0 
<qt_meta_data_QFileDevice>, static_metacall = 0x7ffff63eea30 
<QFileDevice::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = 
{superdata = {direct = 0x7ffff676d7c0 <QFileDevice::staticMetaObject>}, 
stringdata = 0x7ffff6693e40 <qt_meta_stringdata_QFile>, data = 0x7ffff6693e00 
<qt_meta_data_QFile>, static_metacall = 0x7ffff63eb730 
<QFile::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}}
        srcSize = <optimised out>
        sizeProcessed = <optimised out>
        ret = <optimised out>
        existingDestDeleteAttempted = <optimised out>
#3  0x00007ffff7c3ad16 in KIO::SlaveBase::dispatch (this=0x7fffbc030fc0, 
command=<optimised out>, data=...) at 
/usr/src/kio-5.110.0-0ubuntu1/src/core/slavebase.cpp:1364
        permissions = -1
        iOverwrite = 4 '\004'
        url2 = {d = 0x7fffbc03e8f0}
        flags = <optimised out>
        stream = {d = {d = 0x0}, dev = 0x7fffbc04ff70, owndev = true, noswap = 
false, byteorder = QDataStream::BigEndian, ver = 19, q_status = QDataStream::Ok}
        url = {d = 0x7fffbc04db70}
        i = -1140594448
#4  0x00007ffff7c3b8e6 in KIO::SlaveBase::dispatchLoop (this=0x7fffbc030fc0) at 
/usr/src/kio-5.110.0-0ubuntu1/src/core/slavebase.cpp:342
        cmd = 74
        data = {d = 0x7fffbc00ed60}
        ms = <optimised out>
        ret = 113
#5  0x00007ffff7cd8904 in KIO::WorkerThread::run (this=0x55555626e200) at 
/usr/src/kio-5.110.0-0ubuntu1/src/core/workerthread.cpp:62
        slaveOrWorker = std::variant<std::unique_ptr<KIO::SlaveBase>, 
std::unique_ptr<KIO::WorkerBase>> [index 0] containing 
std::unique_ptr<KIO::SlaveBase> = {0x7fffbc030fc0}
        base = 0x7fffbc030fc0
#6  0x00007ffff62daeb1 in operator() (__closure=<optimised out>) at 
thread/qthread_unix.cpp:351
        thr = 0x55555626e200
        data = 0x7fffe8002200
        arg = <optimised out>
        arg = <optimised out>
        thr = <optimised out>
        data = <optimised out>
        locker = <optimised out>
#7  (anonymous 
namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > 
(t=...) at thread/qthread_unix.cpp:288
No locals.
#8  QThreadPrivate::start (arg=0x55555626e200) at thread/qthread_unix.cpp:311
        __clframe = {__cancel_routine = 0x7ffff62da6e0 
<QThreadPrivate::finish(void*)>, __cancel_arg = 0x55555626e200, __do_it = 1, 
__cancel_type = <optimised out>}
#9  0x00007ffff5a97ada in start_thread (arg=<optimised out>) at 
./nptl/pthread_create.c:444
        ret = <optimised out>
        pd = <optimised out>
        out = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737314912240, 
-1667737442159152455, -296, 2, 140737488340496, 140736590761984, 
1667620895591248569, 1667716091769008825}, mask_was_saved = 0}}, priv = {pad = 
{0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#10 0x00007ffff5b2847c in clone3 () at 
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.

Thread 12 (Thread 0x7fffcb7fe6c0 (LWP 3800) "QDBusConnection"):
#0  0x00007ffff5b1a18f in __GI___poll (fds=0x7fffc4001370, nfds=2, timeout=-1) 
at ../sysdeps/unix/sysv/linux/poll.c:29
        sc_ret = -516
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
#1  0x00007ffff4eb83cf in g_main_context_poll_unlocked (priority=2147483647, 
n_fds=2, fds=0x7fffc4001370, timeout=<optimised out>, context=0x7fffc4000c30) 
at ../../../glib/gmain.c:4653
        ret = <optimised out>
        errsv = <optimised out>
        poll_func = 0x7ffff4e63050 <g_poll>
        poll_func = <optimised out>
        ret = <optimised out>
        errsv = <optimised out>
#2  g_main_context_iterate_unlocked.isra.0 
(context=context@entry=0x7fffc4000c30, block=block@entry=1, 
dispatch=dispatch@entry=1, self=<optimised out>) at ../../../glib/gmain.c:4344
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimised out>
        nfds = 2
        allocated_nfds = 2
        fds = 0x7fffc4001370
        begin_time_nsec = 0
#3  0x00007ffff4e5ad20 in g_main_context_iteration (context=0x7fffc4000c30, 
may_block=1) at ../../../glib/gmain.c:4414
        retval = <optimised out>
#4  0x00007ffff6527daa in QEventDispatcherGlib::processEvents 
(this=0x7fffc4000b70, flags=...) at kernel/qeventdispatcher_glib.cpp:423
        d = 0x7fffc4000b90
        canWait = true
        savedFlags = {i = 0}
        result = <optimised out>
#5  0x00007ffff64cb15b in QEventLoop::exec (this=this@entry=0x7fffcb7fdb90, 
flags=..., flags@entry=...) at 
../../include/QtCore/../../src/corelib/global/qflags.h:69
        d = 0x7fffc40012b0
        threadData = <optimised out>
        locker = {val = 93824992868072}
        ref = <optimised out>
        app = <optimised out>
#6  0x00007ffff62d9c52 in QThread::exec (this=this@entry=0x7ffff6ffed80 
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at 
../../include/QtCore/../../src/corelib/global/qflags.h:121
        d = 0x5555555ef690
        locker = {val = 93824992868072}
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff67708c8 <vtable for 
QEventLoop+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, 
stringdata = 0x7ffff66a49c0 <qt_meta_stringdata_QObject>, data = 0x7ffff66a48a0 
<qt_meta_data_QObject>, static_metacall = 0x7ffff6504150 
<QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x7fffc40012b0}, 
static staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 
0x7ffff66a7960 <qt_meta_stringdata_Qt>, data = 0x7ffff66a4ae0 
<qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 
0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7ffff6768180 
<QObject::staticMetaObject>}, stringdata = 0x7ffff66a0b60 
<qt_meta_stringdata_QEventLoop>, data = 0x7ffff66a0b00 
<qt_meta_data_QEventLoop>, static_metacall = 0x7ffff64cae80 
<QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = <optimised out>
#7  0x00007ffff6f851bb in QDBusConnectionManager::run (this=0x7ffff6ffed80 
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at 
qdbusconnection.cpp:179
        locker = <optimised out>
#8  0x00007ffff62daeb1 in operator() (__closure=<optimised out>) at 
thread/qthread_unix.cpp:351
        thr = 0x7ffff6ffed80 <(anonymous 
namespace)::Q_QGS__q_manager::innerFunction()::holder>
        data = 0x5555557e47e0
        arg = <optimised out>
        arg = <optimised out>
        thr = <optimised out>
        data = <optimised out>
        locker = <optimised out>
#9  (anonymous 
namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > 
(t=...) at thread/qthread_unix.cpp:288
No locals.
#10 QThreadPrivate::start (arg=0x7ffff6ffed80 <(anonymous 
namespace)::Q_QGS__q_manager::innerFunction()::holder>) at 
thread/qthread_unix.cpp:311
        __clframe = {__cancel_routine = 0x7ffff62da6e0 
<QThreadPrivate::finish(void*)>, __cancel_arg = 0x7ffff6ffed80 <(anonymous 
namespace)::Q_QGS__q_manager::innerFunction()::holder>, __do_it = 1, 
__cancel_type = <optimised out>}
#11 0x00007ffff5a97ada in start_thread (arg=<optimised out>) at 
./nptl/pthread_create.c:444
        ret = <optimised out>
        pd = <optimised out>
        out = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737314912240, 
-1667737442159152455, -296, 22, 140737488342960, 140736599154688, 
1667624193589260985, 1667716091769008825}, mask_was_saved = 0}}, priv = {pad = 
{0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#12 0x00007ffff5b2847c in clone3 () at 
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.

Thread 7 (Thread 0x7fffcbfff6c0 (LWP 3792) "okular:shlo0"):
#0  0x00007ffff5a94076 in __futex_abstimed_wait_common64 (private=0, 
cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x55555565c858) at 
./nptl/futex-internal.c:57
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
        resultvar = <optimised out>
        __arg6 = <optimised out>
        __arg5 = <optimised out>
        __arg4 = <optimised out>
        __arg3 = <optimised out>
        __arg2 = <optimised out>
        __arg1 = <optimised out>
        _a6 = <optimised out>
        _a5 = <optimised out>
        _a4 = <optimised out>
        _a3 = <optimised out>
        _a2 = <optimised out>
        _a1 = <optimised out>
#1  __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, 
clockid=0, expected=0, futex_word=0x55555565c858) at ./nptl/futex-internal.c:87
        err = <optimised out>
        clockbit = 256
        op = 393
        err = <optimised out>
        clockbit = <optimised out>
        op = <optimised out>
#2  __GI___futex_abstimed_wait_cancelable64 
(futex_word=futex_word@entry=0x55555565c858, expected=expected@entry=0, 
clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at 
./nptl/futex-internal.c:139
No locals.
#3  0x00007ffff5a969fe in __pthread_cond_wait_common (abstime=0x0, clockid=0, 
mutex=0x55555565c808, cond=0x55555565c830) at ./nptl/pthread_cond_wait.c:503
        spin = 0
        buffer = {__routine = 0x7ffff5a966d0 <__condvar_cleanup_waiting>, __arg 
= 0x7fffcbffeac0, __canceltype = 0, __prev = 0x0}
        cbuffer = {wseq = 0, cond = 0x55555565c830, mutex = 0x55555565c808, 
private = 0}
        err = <optimised out>
        g = 0
        flags = <optimised out>
        g1_start = <optimised out>
        maxspin = 0
        signals = <optimised out>
        result = 0
        wseq = 0
        seq = 0
        private = 0
        maxspin = <optimised out>
        err = <optimised out>
        result = <optimised out>
        wseq = <optimised out>
        g = <optimised out>
        seq = <optimised out>
        flags = <optimised out>
        private = <optimised out>
        signals = <optimised out>
        done = <optimised out>
        g1_start = <optimised out>
        spin = <optimised out>
        buffer = <optimised out>
        cbuffer = <optimised out>
        s = <optimised out>
#4  ___pthread_cond_wait (cond=0x55555565c830, mutex=0x55555565c808) at 
./nptl/pthread_cond_wait.c:627
No locals.
#5  0x00007fffed51ed2d in cnd_wait (cond=<optimised out>, mtx=<optimised out>) 
at ../src/c11/impl/threads_posix.c:135
No locals.
#6  0x00007fffed4cf1bb in util_queue_thread_func 
(input=input@entry=0x5555556d57f0) at ../src/util/u_queue.c:290
        job = <optimised out>
        queue = 0x55555565c7f8
        thread_index = 0
#7  0x00007fffed51ec5b in impl_thrd_routine (p=<optimised out>) at 
../src/c11/impl/threads_posix.c:67
        pack = {func = 0x7fffed4cf130 <util_queue_thread_func>, arg = 
0x5555556d57f0}
#8  0x00007ffff5a97ada in start_thread (arg=<optimised out>) at 
./nptl/pthread_create.c:444
        ret = <optimised out>
        pd = <optimised out>
        out = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737314912240, 
-1667737442159152455, -296, 2, 140737488339744, 140736607547392, 
1667623093540762297, 1667716091769008825}, mask_was_saved = 0}}, priv = {pad = 
{0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#9  0x00007ffff5b2847c in clone3 () at 
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.

Thread 6 (Thread 0x7fffd8dff6c0 (LWP 3791) "okular:sh0"):
#0  0x00007ffff5a94076 in __futex_abstimed_wait_common64 (private=0, 
cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x55555565c6b4) at 
./nptl/futex-internal.c:57
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
        resultvar = <optimised out>
        __arg6 = <optimised out>
        __arg5 = <optimised out>
        __arg4 = <optimised out>
        __arg3 = <optimised out>
        __arg2 = <optimised out>
        __arg1 = <optimised out>
        _a6 = <optimised out>
        _a5 = <optimised out>
        _a4 = <optimised out>
        _a3 = <optimised out>
        _a2 = <optimised out>
        _a1 = <optimised out>
#1  __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, 
clockid=0, expected=0, futex_word=0x55555565c6b4) at ./nptl/futex-internal.c:87
        err = <optimised out>
        clockbit = 256
        op = 393
        err = <optimised out>
        clockbit = <optimised out>
        op = <optimised out>
#2  __GI___futex_abstimed_wait_cancelable64 
(futex_word=futex_word@entry=0x55555565c6b4, expected=expected@entry=0, 
clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at 
./nptl/futex-internal.c:139
No locals.
#3  0x00007ffff5a969fe in __pthread_cond_wait_common (abstime=0x0, clockid=0, 
mutex=0x55555565c660, cond=0x55555565c688) at ./nptl/pthread_cond_wait.c:503
        spin = 0
        buffer = {__routine = 0x7ffff5a966d0 <__condvar_cleanup_waiting>, __arg 
= 0x7fffd8dfeac0, __canceltype = 1434637728, __prev = 0x0}
        cbuffer = {wseq = 3, cond = 0x55555565c688, mutex = 0x55555565c660, 
private = 0}
        err = <optimised out>
        g = 1
        flags = <optimised out>
        g1_start = <optimised out>
        maxspin = 0
        signals = <optimised out>
        result = 0
        wseq = 3
        seq = 1
        private = 0
        maxspin = <optimised out>
        err = <optimised out>
        result = <optimised out>
        wseq = <optimised out>
        g = <optimised out>
        seq = <optimised out>
        flags = <optimised out>
        private = <optimised out>
        signals = <optimised out>
        done = <optimised out>
        g1_start = <optimised out>
        spin = <optimised out>
        buffer = <optimised out>
        cbuffer = <optimised out>
        s = <optimised out>
#4  ___pthread_cond_wait (cond=0x55555565c688, mutex=0x55555565c660) at 
./nptl/pthread_cond_wait.c:627
No locals.
#5  0x00007fffed51ed2d in cnd_wait (cond=<optimised out>, mtx=<optimised out>) 
at ../src/c11/impl/threads_posix.c:135
No locals.
#6  0x00007fffed4cf1bb in util_queue_thread_func 
(input=input@entry=0x5555556d5740) at ../src/util/u_queue.c:290
        job = <optimised out>
        queue = 0x55555565c650
        thread_index = 0
#7  0x00007fffed51ec5b in impl_thrd_routine (p=<optimised out>) at 
../src/c11/impl/threads_posix.c:67
        pack = {func = 0x7fffed4cf130 <util_queue_thread_func>, arg = 
0x5555556d5740}
#8  0x00007ffff5a97ada in start_thread (arg=<optimised out>) at 
./nptl/pthread_create.c:444
        ret = <optimised out>
        pd = <optimised out>
        out = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737314912240, 
-1667737442159152455, -296, 2, 140737488339744, 140736823554048, 
1667651405965177529, 1667716091769008825}, mask_was_saved = 0}}, priv = {pad = 
{0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#9  0x00007ffff5b2847c in clone3 () at 
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.

Thread 5 (Thread 0x7fffec8356c0 (LWP 3790) "okular:disk$0"):
#0  0x00007ffff5a94076 in __futex_abstimed_wait_common64 (private=0, 
cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x5555556d4280) at 
./nptl/futex-internal.c:57
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
        resultvar = <optimised out>
        __arg6 = <optimised out>
        __arg5 = <optimised out>
        __arg4 = <optimised out>
        __arg3 = <optimised out>
        __arg2 = <optimised out>
        __arg1 = <optimised out>
        _a6 = <optimised out>
        _a5 = <optimised out>
        _a4 = <optimised out>
        _a3 = <optimised out>
        _a2 = <optimised out>
        _a1 = <optimised out>
#1  __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, 
clockid=0, expected=0, futex_word=0x5555556d4280) at ./nptl/futex-internal.c:87
        err = <optimised out>
        clockbit = 256
        op = 393
        err = <optimised out>
        clockbit = <optimised out>
        op = <optimised out>
#2  __GI___futex_abstimed_wait_cancelable64 
(futex_word=futex_word@entry=0x5555556d4280, expected=expected@entry=0, 
clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at 
./nptl/futex-internal.c:139
No locals.
#3  0x00007ffff5a969fe in __pthread_cond_wait_common (abstime=0x0, clockid=0, 
mutex=0x5555556d4230, cond=0x5555556d4258) at ./nptl/pthread_cond_wait.c:503
        spin = 0
        buffer = {__routine = 0x7ffff5a966d0 <__condvar_cleanup_waiting>, __arg 
= 0x7fffec834ac0, __canceltype = 0, __prev = 0x0}
        cbuffer = {wseq = 0, cond = 0x5555556d4258, mutex = 0x5555556d4230, 
private = 0}
        err = <optimised out>
        g = 0
        flags = <optimised out>
        g1_start = <optimised out>
        maxspin = 0
        signals = <optimised out>
        result = 0
        wseq = 0
        seq = 0
        private = 0
        maxspin = <optimised out>
        err = <optimised out>
        result = <optimised out>
        wseq = <optimised out>
        g = <optimised out>
        seq = <optimised out>
        flags = <optimised out>
        private = <optimised out>
        signals = <optimised out>
        done = <optimised out>
        g1_start = <optimised out>
        spin = <optimised out>
        buffer = <optimised out>
        cbuffer = <optimised out>
        s = <optimised out>
#4  ___pthread_cond_wait (cond=0x5555556d4258, mutex=0x5555556d4230) at 
./nptl/pthread_cond_wait.c:627
No locals.
#5  0x00007fffed51ed2d in cnd_wait (cond=<optimised out>, mtx=<optimised out>) 
at ../src/c11/impl/threads_posix.c:135
No locals.
#6  0x00007fffed4cf1bb in util_queue_thread_func 
(input=input@entry=0x5555556c9200) at ../src/util/u_queue.c:290
        job = <optimised out>
        queue = 0x5555556d4220
        thread_index = 0
#7  0x00007fffed51ec5b in impl_thrd_routine (p=<optimised out>) at 
../src/c11/impl/threads_posix.c:67
        pack = {func = 0x7fffed4cf130 <util_queue_thread_func>, arg = 
0x5555556c9200}
#8  0x00007ffff5a97ada in start_thread (arg=<optimised out>) at 
./nptl/pthread_create.c:444
        ret = <optimised out>
        pd = <optimised out>
        out = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737314912240, 
-1667737442159152455, -296, 0, 140737488339168, 140737153028096, 
1667695975914549945, 1667716091769008825}, mask_was_saved = 0}}, priv = {pad = 
{0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#9  0x00007ffff5b2847c in clone3 () at 
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.

Thread 4 (Thread 0x7fffed1776c0 (LWP 3789) "okular:cs0"):
#0  0x00007ffff5a94076 in __futex_abstimed_wait_common64 (private=0, 
cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x55555565b0e0) at 
./nptl/futex-internal.c:57
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
        resultvar = <optimised out>
        __arg6 = <optimised out>
        __arg5 = <optimised out>
        __arg4 = <optimised out>
        __arg3 = <optimised out>
        __arg2 = <optimised out>
        __arg1 = <optimised out>
        _a6 = <optimised out>
        _a5 = <optimised out>
        _a4 = <optimised out>
        _a3 = <optimised out>
        _a2 = <optimised out>
        _a1 = <optimised out>
#1  __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, 
clockid=0, expected=0, futex_word=0x55555565b0e0) at ./nptl/futex-internal.c:87
        err = <optimised out>
        clockbit = 256
        op = 393
        err = <optimised out>
        clockbit = <optimised out>
        op = <optimised out>
#2  __GI___futex_abstimed_wait_cancelable64 
(futex_word=futex_word@entry=0x55555565b0e0, expected=expected@entry=0, 
clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at 
./nptl/futex-internal.c:139
No locals.
#3  0x00007ffff5a969fe in __pthread_cond_wait_common (abstime=0x0, clockid=0, 
mutex=0x55555565b090, cond=0x55555565b0b8) at ./nptl/pthread_cond_wait.c:503
        spin = 0
        buffer = {__routine = 0x7ffff5a966d0 <__condvar_cleanup_waiting>, __arg 
= 0x7fffed176ac0, __canceltype = 0, __prev = 0x0}
        cbuffer = {wseq = 4, cond = 0x55555565b0b8, mutex = 0x55555565b090, 
private = 0}
        err = <optimised out>
        g = 0
        flags = <optimised out>
        g1_start = <optimised out>
        maxspin = 0
        signals = <optimised out>
        result = 0
        wseq = 4
        seq = 2
        private = 0
        maxspin = <optimised out>
        err = <optimised out>
        result = <optimised out>
        wseq = <optimised out>
        g = <optimised out>
        seq = <optimised out>
        flags = <optimised out>
        private = <optimised out>
        signals = <optimised out>
        done = <optimised out>
        g1_start = <optimised out>
        spin = <optimised out>
        buffer = <optimised out>
        cbuffer = <optimised out>
        s = <optimised out>
#4  ___pthread_cond_wait (cond=0x55555565b0b8, mutex=0x55555565b090) at 
./nptl/pthread_cond_wait.c:627
No locals.
#5  0x00007fffed51ed2d in cnd_wait (cond=<optimised out>, mtx=<optimised out>) 
at ../src/c11/impl/threads_posix.c:135
No locals.
#6  0x00007fffed4cf1bb in util_queue_thread_func 
(input=input@entry=0x55555565b4b0) at ../src/util/u_queue.c:290
        job = <optimised out>
        queue = 0x55555565b080
        thread_index = 0
#7  0x00007fffed51ec5b in impl_thrd_routine (p=<optimised out>) at 
../src/c11/impl/threads_posix.c:67
        pack = {func = 0x7fffed4cf130 <util_queue_thread_func>, arg = 
0x55555565b4b0}
#8  0x00007ffff5a97ada in start_thread (arg=<optimised out>) at 
./nptl/pthread_create.c:444
        ret = <optimised out>
        pd = <optimised out>
        out = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737314912240, 
-1667737442159152455, -296, 22, 140737488339968, 140737162735616, 
1667699170296476345, 1667716091769008825}, mask_was_saved = 0}}, priv = {pad = 
{0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#9  0x00007ffff5b2847c in clone3 () at 
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.

Thread 3 (Thread 0x7fffefe626c0 (LWP 3385) "WaylandEventThr"):
#0  0x00007ffff5b1a18f in __GI___poll (fds=fds@entry=0x7fffefe61bb0, 
nfds=nfds@entry=2, timeout=timeout@entry=-1) at 
../sysdeps/unix/sysv/linux/poll.c:29
        sc_ret = -516
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
#1  0x00007ffff4a170a6 in poll (__timeout=-1, __nfds=2, __fds=0x7fffefe61bb0) 
at /usr/include/x86_64-linux-gnu/bits/poll2.h:39
No locals.
#2  QtWaylandClient::EventThread::run (this=0x5555555d0930) at 
qwaylanddisplay.cpp:210
        fds = {{fd = 3, events = 1, revents = 0}, {fd = 9, events = 1, revents 
= 0}}
        pipe = <optimised out>
#3  0x00007ffff62daeb1 in operator() (__closure=<optimised out>) at 
thread/qthread_unix.cpp:351
        thr = 0x5555555d0930
        data = 0x5555555cb370
        arg = <optimised out>
        arg = <optimised out>
        thr = <optimised out>
        data = <optimised out>
        locker = <optimised out>
#4  (anonymous 
namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > 
(t=...) at thread/qthread_unix.cpp:288
No locals.
#5  QThreadPrivate::start (arg=0x5555555d0930) at thread/qthread_unix.cpp:311
        __clframe = {__cancel_routine = 0x7ffff62da6e0 
<QThreadPrivate::finish(void*)>, __cancel_arg = 0x5555555d0930, __do_it = 1, 
__cancel_type = <optimised out>}
#6  0x00007ffff5a97ada in start_thread (arg=<optimised out>) at 
./nptl/pthread_create.c:444
        ret = <optimised out>
        pd = <optimised out>
        out = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737314912240, 
-1667737442159152455, -296, 2, 140737488343952, 140737209835520, 
1667702325486826169, 1667716091769008825}, mask_was_saved = 0}}, priv = {pad = 
{0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#7  0x00007ffff5b2847c in clone3 () at 
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.

Thread 2 (Thread 0x7ffff06636c0 (LWP 3384) "WaylandEventThr"):
#0  0x00007ffff5b1a18f in __GI___poll (fds=fds@entry=0x7ffff0662bb0, 
nfds=nfds@entry=2, timeout=timeout@entry=-1) at 
../sysdeps/unix/sysv/linux/poll.c:29
        sc_ret = -516
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
#1  0x00007ffff4a170a6 in poll (__timeout=-1, __nfds=2, __fds=0x7ffff0662bb0) 
at /usr/include/x86_64-linux-gnu/bits/poll2.h:39
No locals.
#2  QtWaylandClient::EventThread::run (this=0x5555555caed0) at 
qwaylanddisplay.cpp:210
        fds = {{fd = 3, events = 1, revents = 0}, {fd = 6, events = 1, revents 
= 0}}
        pipe = <optimised out>
#3  0x00007ffff62daeb1 in operator() (__closure=<optimised out>) at 
thread/qthread_unix.cpp:351
        thr = 0x5555555caed0
        data = 0x5555555d0330
        arg = <optimised out>
        arg = <optimised out>
        thr = <optimised out>
        data = <optimised out>
        locker = <optimised out>
#4  (anonymous 
namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > 
(t=...) at thread/qthread_unix.cpp:288
No locals.
#5  QThreadPrivate::start (arg=0x5555555caed0) at thread/qthread_unix.cpp:311
        __clframe = {__cancel_routine = 0x7ffff62da6e0 
<QThreadPrivate::finish(void*)>, __cancel_arg = 0x5555555caed0, __do_it = 1, 
__cancel_type = <optimised out>}
#6  0x00007ffff5a97ada in start_thread (arg=<optimised out>) at 
./nptl/pthread_create.c:444
        ret = <optimised out>
        pd = <optimised out>
        out = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737314912240, 
-1667737442159152455, -296, 2, 140737488343792, 140737218228224, 
1667705623484838585, 1667716091769008825}, mask_was_saved = 0}}, priv = {pad = 
{0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#7  0x00007ffff5b2847c in clone3 () at 
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
No locals.

Thread 1 (Thread 0x7ffff1dfd9c0 (LWP 3211) "okular"):
#0  0x00007ffff5b1a18f in __GI___poll (fds=0x555555e3c6c0, nfds=3, timeout=389) 
at ../sysdeps/unix/sysv/linux/poll.c:29
        sc_ret = -516
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
#1  0x00007ffff4eb83cf in g_main_context_poll_unlocked (priority=2147483647, 
n_fds=3, fds=0x555555e3c6c0, timeout=<optimised out>, context=0x5555555d1160) 
at ../../../glib/gmain.c:4653
        ret = <optimised out>
        errsv = <optimised out>
        poll_func = 0x7ffff4e63050 <g_poll>
        poll_func = <optimised out>
        ret = <optimised out>
        errsv = <optimised out>
#2  g_main_context_iterate_unlocked.isra.0 
(context=context@entry=0x5555555d1160, block=block@entry=1, 
dispatch=dispatch@entry=1, self=<optimised out>) at ../../../glib/gmain.c:4344
        max_priority = 2147483647
        timeout = 389
        some_ready = <optimised out>
        nfds = 3
        allocated_nfds = 4
        fds = 0x555555e3c6c0
        begin_time_nsec = 0
#3  0x00007ffff4e5ad20 in g_main_context_iteration (context=0x5555555d1160, 
may_block=1) at ../../../glib/gmain.c:4414
        retval = <optimised out>
#4  0x00007ffff6527daa in QEventDispatcherGlib::processEvents 
(this=0x5555555d0980, flags=...) at kernel/qeventdispatcher_glib.cpp:423
        d = 0x5555555d0d00
        canWait = true
        savedFlags = {i = 36}
        result = <optimised out>
#5  0x00007ffff64cb15b in QEventLoop::exec (this=0x7fffffffcf30, flags=..., 
flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
        d = 0x55555620a9f0
        threadData = <optimised out>
        locker = {val = 93824992537768}
        ref = <optimised out>
        app = <optimised out>
#6  0x00007ffff77ac9a5 in KJob::exec (this=this@entry=0x55555620da30) at 
/usr/include/x86_64-linux-gnu/qt5/QtCore/qflags.h:121
        d = 0x5555561d9100
        wasAutoDelete = true
        loop = {<QObject> = {_vptr.QObject = 0x7ffff67708c8 <vtable for 
QEventLoop+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, 
stringdata = 0x7ffff66a49c0 <qt_meta_stringdata_QObject>, data = 0x7ffff66a48a0 
<qt_meta_data_QObject>, static_metacall = 0x7ffff6504150 
<QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x55555620a9f0}, 
static staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 
0x7ffff66a7960 <qt_meta_stringdata_Qt>, data = 0x7ffff66a4ae0 
<qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 
0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7ffff6768180 
<QObject::staticMetaObject>}, stringdata = 0x7ffff66a0b60 
<qt_meta_stringdata_QEventLoop>, data = 0x7ffff66a0b00 
<qt_meta_data_QEventLoop>, static_metacall = 0x7ffff64cae80 
<QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}}
#7  0x00007fffd80f125a in Okular::Part::saveAs (this=this@entry=0x5555557743f0, 
saveUrl=..., flags=...) at /usr/src/okular-4:23.08.1-0ubuntu1/part/part.cpp:2903
        fi = {d_ptr = {d = 0x7fffe0001a50}}
        hasUserAcceptedReload = <optimised out>
        setModifiedAfterSave = false
        tmpFileName = {d = 0x555555e261c0}
        deleteTmpFileName = true
        realSaveUrl = {d = 0x555556202db0}
        tempFile = {d = 0x0}
        copyJob = 0x55555620da30
        deleteTmpFileFunction = {__deleteTmpFileName = true, __tmpFileName = {d 
= 0x555555e261c0}}
        reloadedCorrectly = <optimised out>
        saveFilePath = {d = 0x0}
#8  0x00007fffd80f2843 in Okular::Part::saveAs (saveUrl=..., 
this=0x5555557743f0) at /usr/src/okular-4:23.08.1-0ubuntu1/part/part.cpp:2639
No locals.
#9  Okular::Part::saveFile (this=0x5555557743f0) at 
/usr/src/okular-4:23.08.1-0ubuntu1/part/part.cpp:2577
No locals.
#10 Okular::Part::saveFile (this=0x5555557743f0) at 
/usr/src/okular-4:23.08.1-0ubuntu1/part/part.cpp:2572
No locals.
#11 0x00007ffff6506312 in QtPrivate::QSlotObjectBase::call (a=0x7fffffffd220, 
r=0x5555557743f0, this=0x555555807510) at 
../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
No locals.
#12 doActivate<false> (sender=0x5555557e7d20, signal_index=4, 
argv=0x7fffffffd220) at kernel/qobject.cpp:3925
        obj = <optimised out>
        receiver = 0x5555557743f0
        td = <optimised out>
        receiverInSameThread = <optimised out>
        senderData = {previous = 0x0, receiver = 0x5555557743f0, sender = 
0x5555557e7d20, signal = 4}
        c = 0x555555807530
        connections = {d = 0x5555557e8060}
        list = <optimised out>
        inSenderThread = <optimised out>
        highestConnectionId = 4
        signalVector = <optimised out>
        currentThreadId = 0x7ffff1dfd9c0
        sp = <optimised out>
        signal_spy_set = 0x0
        empty_argv = {0x0}
        senderDeleted = false
#13 0x00007ffff64fec47 in QMetaObject::activate 
(sender=sender@entry=0x5555557e7d20, m=m@entry=0x7ffff768eca0 
<QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, 
argv=argv@entry=0x7fffffffd220) at kernel/qobject.cpp:3985
        signal_index = <optimised out>
#14 0x00007ffff7165256 in QAction::triggered (this=this@entry=0x5555557e7d20, 
_t1=<optimised out>) at .moc/moc_qaction.cpp:376
        _a = {0x0, 0x7fffffffd21c}
#15 0x00007ffff7167f57 in QAction::activate (this=0x5555557e7d20, 
event=<optimised out>) at kernel/qaction.cpp:1161
        guard = <optimised out>
        d = 0x5555557e7d40
#16 0x00007ffff7168b3d in QAction::event (e=<optimised out>, this=<optimised 
out>) at kernel/qaction.cpp:1086
        se = <optimised out>
#17 QAction::event (this=<optimised out>, e=<optimised out>) at 
kernel/qaction.cpp:1075
        se = <optimised out>
#18 0x00007ffff716bc82 in QApplicationPrivate::notify_helper (this=<optimised 
out>, receiver=0x5555557e7d20, e=0x7fffffffd3c0) at kernel/qapplication.cpp:3640
        consumed = false
        filtered = false
#19 0x00007ffff64cc7a8 in QCoreApplication::notifyInternal2 
(receiver=0x5555557e7d20, event=0x7fffffffd3c0) at 
kernel/qcoreapplication.cpp:1064
        selfRequired = true
        result = false
        cbdata = {0x5555557e7d20, 0x7fffffffd3c0, 0x7fffffffd2ff}
        d = <optimised out>
        threadData = 0x555555584f50
        scopeLevelCounter = {threadData = 0x555555584f50}
#20 0x00007ffff64cc982 in QCoreApplication::sendEvent (receiver=<optimised 
out>, event=<optimised out>) at kernel/qcoreapplication.cpp:1462
No locals.
#21 0x00007ffff6974981 in QShortcutMap::dispatchEvent (this=<optimised out>, 
e=<optimised out>) at kernel/qshortcutmap.cpp:675
        d = <optimised out>
        curKey = <optimised out>
        current = <optimised out>
        next = <optimised out>
        i = <optimised out>
        enabledShortcuts = <optimised out>
        ambiguousShortcuts = {d = 0x7ffff65c7800 <QArrayData::shared_null>}
        se = {<QEvent> = {_vptr.QEvent = 0x7ffff6ed8598 <vtable for 
QShortcutEvent+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, 
stringdata = 0x7ffff66a1800 <qt_meta_stringdata_QEvent>, data = 0x7ffff66a1240 
<qt_meta_data_QEvent>, static_metacall = 0x0, relatedMetaObjects = 0x0, 
extradata = 0x0}}, d = 0x0, t = 117, posted = 0, spont = 0, m_accept = 1, 
reserved = 2755}, sequence = {d = 0x5555557e7f20}, ambig = false, sid = -22}
#22 0x00007ffff69755a3 in QShortcutMap::tryShortcut 
(this=this@entry=0x5555555a7988, e=e@entry=0x7fffffffd480) at 
kernel/qshortcutmap.cpp:343
        identicalMatches = 1
        d = <optimised out>
        previousState = <optimised out>
#23 0x00007ffff691adaa in QWindowSystemInterface::handleShortcutEvent 
(window=<optimised out>, timestamp=375079, keyCode=83, modifiers=..., 
nativeScanCode=39, nativeVirtualKey=115, nativeModifiers=20, text=..., 
autorepeat=false, count=1) at kernel/qwindowsysteminterface.cpp:477
        shortcutMap = @0x5555555a7988: {d_ptr = {d = 0x55555559dcc0}}
        keyEvent = {<QInputEvent> = {<QEvent> = {_vptr.QEvent = 0x7ffff6ed8258 
<vtable for QKeyEvent+16>, static staticMetaObject = {d = {superdata = {direct 
= 0x0}, stringdata = 0x7ffff66a1800 <qt_meta_stringdata_QEvent>, data = 
0x7ffff66a1240 <qt_meta_data_QEvent>, static_metacall = 0x0, relatedMetaObjects 
= 0x0, extradata = 0x0}}, d = 0x0, t = 51, posted = 0, spont = 0, m_accept = 0, 
reserved = 7424}, modState = {i = 67108864}, ts = 0}, txt = {d = 
0x555555bb4cb0}, k = 83, nScanCode = 39, nVirtualKey = 115, nModifiers = 20, c 
= 1, autor = 0}
#24 0x00007ffff693f9b1 in QGuiApplicationPrivate::processKeyEvent 
(e=0x5555561ce890) at kernel/qguiapplication.cpp:2391
        window = 0x555555f5e740
        ev = {<QInputEvent> = {<QEvent> = {_vptr.QEvent = 0x555556047f00, 
static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 
0x7ffff66a1800 <qt_meta_stringdata_QEvent>, data = 0x7ffff66a1240 
<qt_meta_data_QEvent>, static_metacall = 0x0, relatedMetaObjects = 0x0, 
extradata = 0x0}}, d = 0x555556048240, t = 54656, posted = 1, spont = 1, 
m_accept = 1, reserved = 8191}, modState = {i = 32767}, ts = 93824992589232}, 
txt = {d = 0x0}, k = -164523891, nScanCode = 32767, nVirtualKey = 1432137104, 
nModifiers = 21845, c = 25168, autor = 0}
#25 0x00007ffff691762c in QWindowSystemInterface::sendWindowSystemEvents 
(flags=...) at kernel/qwindowsysteminterface.cpp:1169
        event = 0x5555561ce890
        nevents = 1
#26 0x00007ffff4a4eb74 in userEventSourceDispatch(_GSource*, int (*)(void*), 
void*) () from /lib/x86_64-linux-gnu/libQt5WaylandClient.so.5
No symbol table info available.
#27 0x00007ffff4e5cb2c in g_main_dispatch (context=0x5555555d1160) at 
../../../glib/gmain.c:3476
        dispatch = 0x7ffff4a4eb60 <userEventSourceDispatch(_GSource*, int 
(*)(void*), void*)>
        prev_source = 0x0
        begin_time_nsec = 0
        was_in_call = 0
        user_data = 0x0
        callback = 0x0
        cb_funcs = <optimised out>
        cb_data = <optimised out>
        need_destroy = <optimised out>
        source = 0x5555555cba00
        current = 0x5555560b7800
        i = 1
        __func__ = "g_main_dispatch"
#28 0x00007ffff4eb846f in g_main_context_dispatch_unlocked 
(context=0x5555555d1160) at ../../../glib/gmain.c:4284
No locals.
#29 g_main_context_iterate_unlocked.isra.0 
(context=context@entry=0x5555555d1160, block=block@entry=1, 
dispatch=dispatch@entry=1, self=<optimised out>) at ../../../glib/gmain.c:4349
        max_priority = 2147483647
        timeout = 672
        some_ready = 1
        nfds = <optimised out>
        allocated_nfds = 2
        fds = 0x55555609b8f0
        begin_time_nsec = 0
#30 0x00007ffff4e5ad20 in g_main_context_iteration (context=0x5555555d1160, 
may_block=1) at ../../../glib/gmain.c:4414
        retval = <optimised out>
#31 0x00007ffff6527daa in QEventDispatcherGlib::processEvents 
(this=0x5555555d0980, flags=...) at kernel/qeventdispatcher_glib.cpp:423
        d = 0x5555555d0d00
        canWait = true
        savedFlags = {i = 0}
        result = <optimised out>
#32 0x00007ffff64cb15b in QEventLoop::exec (this=this@entry=0x7fffffffd7c0, 
flags=..., flags@entry=...) at 
../../include/QtCore/../../src/corelib/global/qflags.h:69
        d = 0x555556061b30
        threadData = <optimised out>
        locker = {val = 93824992537768}
        ref = <optimised out>
        app = <optimised out>
#33 0x00007ffff64d3904 in QCoreApplication::exec () at 
../../include/QtCore/../../src/corelib/global/qflags.h:121
        threadData = 0x555555584f50
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff67708c8 <vtable for 
QEventLoop+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, 
stringdata = 0x7ffff66a49c0 <qt_meta_stringdata_QObject>, data = 0x7ffff66a48a0 
<qt_meta_data_QObject>, static_metacall = 0x7ffff6504150 
<QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x555556061b30}, 
static staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 
0x7ffff66a7960 <qt_meta_stringdata_Qt>, data = 0x7ffff66a4ae0 
<qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 
0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7ffff6768180 
<QObject::staticMetaObject>}, stringdata = 0x7ffff66a0b60 
<qt_meta_stringdata_QEventLoop>, data = 0x7ffff66a0b00 
<qt_meta_data_QEventLoop>, static_metacall = 0x7ffff64cae80 
<QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = <optimised out>
#34 0x00007ffff6937610 in QGuiApplication::exec () at 
kernel/qguiapplication.cpp:1863
No locals.
#35 0x00007ffff716bbf9 in QApplication::exec () at kernel/qapplication.cpp:2832
No locals.
#36 0x0000555555569bef in main (argc=<optimised out>, argv=<optimised out>) at 
/usr/src/okular-4:23.08.1-0ubuntu1/shell/main.cpp:109
        app = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = 
{_vptr.QObject = 0x7ffff768ee88 <vtable for QApplication+16>, static 
staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 
0x7ffff66a49c0 <qt_meta_stringdata_QObject>, data = 0x7ffff66a48a0 
<qt_meta_data_QObject>, static_metacall = 0x7ffff6504150 
<QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x5555555a78c0}, 
static staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 
0x7ffff66a7960 <qt_meta_stringdata_Qt>, data = 0x7ffff66a4ae0 
<qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 
0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7ffff6768180 
<QObject::staticMetaObject>}, stringdata = 0x7ffff66a0d80 
<qt_meta_stringdata_QCoreApplication>, data = 0x7ffff66a0c60 
<qt_meta_data_QCoreApplication>, static_metacall = 0x7ffff64ce040 
<QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, 
void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, static self = 
0x7fffffffd960}, static staticMetaObject = {d = {superdata = {direct = 
0x7ffff6770a60 <QCoreApplication::staticMetaObject>}, stringdata = 
0x7ffff6df5dc0 <qt_meta_stringdata_QGuiApplication>, data = 0x7ffff6df5b40 
<qt_meta_data_QGuiApplication>, static_metacall = 0x7ffff693c920 
<QGuiApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, 
void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject 
= {d = {superdata = {direct = 0x7ffff6ed78e0 
<QGuiApplication::staticMetaObject>}, stringdata = 0x7ffff7539e20 
<qt_meta_stringdata_QApplication>, data = 0x7ffff7539ca0 
<qt_meta_data_QApplication>, static_metacall = 0x7ffff716f8d0 
<QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
relatedMetaObjects = 0x0, extradata = 0x0}}}
        aboutData = {d = std::unique_ptr<KAboutDataPrivate> = {get() = 
0x5555557fd440}}
        parser = {d = 0x555555783b40}

** Affects: okular (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: mantic

** Attachment added: "gdb backtrace"
   
https://bugs.launchpad.net/bugs/2051368/+attachment/5742638/+files/backtrace.txt

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https://bugs.launchpad.net/bugs/2051368

Title:
  Okular crashes when saving file to btrfs partition

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