Thread 2 (Thread 0x7f540ce50700 (LWP 16993)):
#0  0x00007f5416f1be8d in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00007f54144b4c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
No symbol table info available.
#2  0x00007f54144b68d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
No symbol table info available.
#3  0x00007f5418ed3655 in QXcbEventReader::run (this=0xf40ff0) at qxcbconnection.cpp:1327
        event = 0x0
#4  0x00007f54178465bc in QThreadPrivate::start (arg=0xf40ff0) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f541784663a <QThreadPrivate::finish(void*)>, __cancel_arg = 0xf40ff0, __do_it = 1, __cancel_type = 32596}
        thr = 0xf40ff0
        data = 0xf41350
#5  0x00007f5416c0b6fa in start_thread (arg=0x7f540ce50700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f540ce50700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139998970316544, 3274409847032181854, 0, 140727288995983, 139998970317248, 0, -3181490076410121122, -3181467779406564258}, 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"
#6  0x00007f5416f27b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 1 (Thread 0x7f5418ff2740 (LWP 16980)):
#0  0x00007f5417eba55a in QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data (this=0x8) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
No locals.
#1  0x00007f5417f3042a in qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:1014
No locals.
#2  0x00007f5417f30790 in QOpenGLContext::d_func (this=0x0) at ../../include/QtGui/../../src/gui/kernel/qopenglcontext.h:145
No locals.
#3  0x00007f5417f2e1e9 in QOpenGLContext::functions (this=0x0) at kernel/qopenglcontext.cpp:727
        d = 0x7f5417f2d908 <QOpenGLContext::currentContext()+28>
#4  0x00007f54182bdd5f in QOpenGLDebugLogger::stopLogging (this=0x7ffda0122ad0) at opengl/qopengldebug.cpp:1507
        d = 0x1066260
        funcs = 0x44
#5  0x00007f54182bd22e in QOpenGLDebugLogger::~QOpenGLDebugLogger (this=0x7ffda0122ad0, __in_chrg=<optimized out>) at opengl/qopengldebug.cpp:1324
No locals.
#6  0x0000000000401508 in main (argc=1, argv=0x7ffda0122c28) at ../qtbug54799/main.cpp:27
        application = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0x7f5418dd5940 <vtable for QApplication+16>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f5417c4e940 <qt_meta_stringdata_QObject>, data = 0x7f5417c4ea60 <qt_meta_data_QObject>, static_metacall = 0x7f5417adbc84 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0xf1b5b0}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f5417c9d460 <qt_meta_stringdata_Qt>, data = 0x7f5417ca8160 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7f5417dac640 <QObject::staticMetaObject>, stringdata = 0x7f5417cb77a0 <qt_meta_stringdata_QCoreApplication>, data = 0x7f5417cb79c0 <qt_meta_data_QCoreApplication>, static_metacall = 0x7f5417b83c30 <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, static self = 0x7ffda0122ab0}, static staticMetaObject = {d = {superdata = 0x7f5417db5340 <QCoreApplication::staticMetaObject>, stringdata = 0x7f5418388aa0 <qt_meta_stringdata_QGuiApplication>, data = 0x7f5418388fe0 <qt_meta_data_QGuiApplication>, static_metacall = 0x7f5417ed9e46 <QGuiApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7f541853f000 <QGuiApplication::staticMetaObject>, stringdata = 0x7f5418bdae40 <qt_meta_stringdata_QApplication>, data = 0x7f5418bdb160 <qt_meta_data_QApplication>, static_metacall = 0x7f54186e15c0 <QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        format = {d = 0xf76520}
        surface = {<QObject> = {_vptr.QObject = 0x7f54185451e0 <vtable for QOffscreenSurface+16>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f5417c4e940 <qt_meta_stringdata_QObject>, data = 0x7f5417c4ea60 <qt_meta_data_QObject>, static_metacall = 0x7f5417adbc84 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0xf75ca0}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f5417c9d460 <qt_meta_stringdata_Qt>, data = 0x7f5417ca8160 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, <QSurface> = {_vptr.QSurface = 0x7f5418545270 <vtable for QOffscreenSurface+160>, m_type = QSurface::Offscreen, m_reserved = 0x0}, static staticMetaObject = {d = {superdata = 0x7f5417dac640 <QObject::staticMetaObject>, stringdata = 0x7f54183e97a0 <qt_meta_stringdata_QOffscreenSurface>, data = 0x7f54183e9880 <qt_meta_data_QOffscreenSurface>, static_metacall = 0x7f5418317f66 <QOffscreenSurface::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        __PRETTY_FUNCTION__ = "int main(int, char**)"
        context = {<QObject> = {_vptr.QObject = 0x7f54185401e0 <vtable for QOpenGLContext+16>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f5417c4e940 <qt_meta_stringdata_QObject>, data = 0x7f5417c4ea60 <qt_meta_data_QObject>, static_metacall = 0x7f5417adbc84 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0xf79f60}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f5417c9d460 <qt_meta_stringdata_Qt>, data = 0x7f5417ca8160 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7f5417dac640 <QObject::staticMetaObject>, stringdata = 0x7f5418392620 <qt_meta_stringdata_QOpenGLContext>, data = 0x7f54183926e0 <qt_meta_data_QOpenGLContext>, static_metacall = 0x7f5417f301c6 <QOpenGLContext::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        logger = {<QObject> = {_vptr.QObject = 0x7f5418543a60 <vtable for QOpenGLDebugLogger+16>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f5417c4e940 <qt_meta_stringdata_QObject>, data = 0x7f5417c4ea60 <qt_meta_data_QObject>, static_metacall = 0x7f5417adbc84 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x1066260}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f5417c9d460 <qt_meta_stringdata_Qt>, data = 0x7f5417ca8160 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7f5417dac640 <QObject::staticMetaObject>, stringdata = 0x7f54183deb80 <qt_meta_stringdata_QOpenGLDebugLogger>, data = 0x7f54183ded80 <qt_meta_data_QOpenGLDebugLogger>, static_metacall = 0x7f54182beb7c <QOpenGLDebugLogger::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}