#0  QFreeList<void, QtTimerIdFreeListConstants>::next (this=0x0) at ../../include/QtCore/5.12.3/QtCore/private/../../../../../src/corelib/tools/qfreelist_p.h:244
#1  QAbstractEventDispatcherPrivate::allocateTimerId () at kernel/qabstracteventdispatcher.cpp:93
#2  0x00007ffff6bd4849 in QAbstractEventDispatcher::registerTimer (this=0x7fff9c0023f0, interval=interval@entry=188773, timerType=timerType@entry=Qt::CoarseTimer,
    object=object@entry=0x55555a432730) at kernel/qabstracteventdispatcher.cpp:267
#3  0x00007ffff6c0218e in QObject::startTimer (this=0x55555a432730, interval=188773, timerType=Qt::CoarseTimer) at /usr/include/c++/8.3.0/bits/atomic_base.h:707
#4  0x0000555557041063 in base::Timer::adjust() ()
#5  0x00007ffff6c016f2 in QObject::event (this=0x55555a432730, e=<optimized out>) at kernel/qobject.cpp:1260
#6  0x00007ffff76d35b1 in QApplicationPrivate::notify_helper (this=this@entry=0x555558bacd00, receiver=receiver@entry=0x55555a432730, e=e@entry=0x55555f29ff20)
    at kernel/qapplication.cpp:3736
#7  0x00007ffff76da960 in QApplication::notify (this=0x7fffffffdd10, receiver=0x55555a432730, e=0x55555f29ff20) at kernel/qapplication.cpp:3483
#8  0x00005555564650d4 in Core::Sandbox::notify(QObject*, QEvent*) ()
#9  0x00007ffff6bd6e89 in QCoreApplication::notifyInternal2 (receiver=0x55555a432730, event=0x55555f29ff20)
    at ../../include/QtCore/5.12.3/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:322
#10 0x00007ffff6bd9ed7 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x55555a4325f0) at kernel/qcoreapplication.cpp:1799
#11 0x00007ffff6c2b4d3 in postEventSourceDispatch (s=0x7fff9c001df0) at kernel/qeventdispatcher_glib.cpp:276
#12 0x00007ffff63c14ae in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007ffff63c1748 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007ffff63c17e0 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007ffff6c2aae3 in QEventDispatcherGlib::processEvents (this=0x7fff9c0023f0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#16 0x00007ffff6bd5b5b in QEventLoop::exec (this=this@entry=0x7fffba6b5da0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#17 0x00007ffff6a12536 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#18 0x00007ffff6a13882 in QThreadPrivate::start (arg=0x55555a42e410) at thread/qthread_unix.cpp:361
#19 0x00007ffff6354132 in ?? () from /usr/lib/x86_64-linux-gnu/libpthread.so.0
#20 0x00007ffff5f42103 in clone () from /usr/lib/x86_64-linux-gnu/libc.so.6