#0  0x00007fb06a6fc357 in QHash<int, QWindowSystemInterface::TouchPoint>::remove (this=0x7fb00d45bcd0, akey=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qhash.h:826
        next = <optimized out>
        deleteNext = <optimized out>
        oldSize = 222676736
        node = 0x1e633f0
        akey = <optimized out>
        this = 0x7fb00d45bcd0
#1  0x0000000001df5500 in ?? ()
No symbol table info available.
#2  0x0000000001df6290 in ?? ()
No symbol table info available.
#3  0x00007fb07421a5c2 in QOpenGLContext::makeCurrent (this=0x7fb00d45bd00, surface=0x7fb06a6feafb <SessionAuthorizer::connection_is_allowed(mir::frontend::SessionCredentials const&)+683>) at kernel/qopenglcontext.cpp:813
        __PRETTY_FUNCTION__ = "bool QOpenGLContext::makeCurrent(QSurface*)"
        previous = 0x1e667a0
#4  0x00007fb073684b12 in QSGRenderThread::sync (this=0x1df55d0) at scenegraph/qsgthreadedrenderloop.cpp:537
        current = false
#5  0x00007fb073684e98 in QSGRenderThread::syncAndRender (this=0x1df55d0) at scenegraph/qsgthreadedrenderloop.cpp:587
        profileFrames = false
        current = 48
        __PRETTY_FUNCTION__ = "void QSGRenderThread::syncAndRender()"
        waitTimer = {t1 = 7028, t2 = 465257932}
#6  0x00007fb0736857d8 in QSGRenderThread::run (this=0x1df55d0) at scenegraph/qsgthreadedrenderloop.cpp:704
No locals.
#7  0x00007fb0727036ce in QThreadPrivate::start (arg=0x1df55d0) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7fb0727027a0 <QThreadPrivate::finish(void*)>, __cancel_arg = 0x1df55d0, __do_it = 1, __cancel_type = <optimized out>}
        thr = 0x1df55d0
        data = 0x1df5730
        objectName = {static null = {<No data fields>}, d = 0x7fb0729f59e0 <QArrayData::shared_null>}
#8  0x00007fb070f2d0a5 in start_thread (arg=0x7fb00d45c700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7fb00d45c700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140394113648384, -6491673729168809775, 0, 0, 140394113649088, 140394113648384, 6523723168155721937, 6523482505519194321}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#9  0x00007fb071e7590d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.