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  1. Qt
  2. QTBUG-34875

Crash when using QtQuick Canvas

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Details

    Description

      1. apply the attached patch to qtcreator to make it use the Canvas included in QtQuick instead of its own. Note that it only changes QML code, not C++.
      2. Start qtcreator and switch to QML debugger.
      3. crash from somewhere deep in the QML engine:

      Thread 19 (Thread 0x7fff817fa700 (LWP 22657)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ffff54e3f4d in QWaitConditionPrivate::wait (this=0x3b83210, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:136
        code = 0
#2  0x00007ffff54e3cf7 in QWaitCondition::wait (this=0x3b82fe8, mutex=0x3b82fe0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
        __PRETTY_FUNCTION__ = "bool QWaitCondition::wait(QMutex*, long unsigned int)"
        returnValue = false
#3  0x00007fffe7326d69 in QSGRenderThreadEventQueue::takeEvent (this=0x3b82fd8, wait=true) at scenegraph/qsgthreadedrenderloop.cpp:252
        e = 0x3b83160
#4  0x00007fffe732501d in QSGRenderThread::processEventsAndWaitForMore (this=0x3b82f60) at scenegraph/qsgthreadedrenderloop.cpp:637
        e = 0x3b83120
#5  0x00007fffe73251de in QSGRenderThread::run (this=0x3b82f60) at scenegraph/qsgthreadedrenderloop.cpp:667
No locals.
#6  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x3b82f60) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x3b82f60, __do_it = 1, __cancel_type = 0}
        thr = 0x3b82f60
        data = 0x3b83120
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#7  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff817fa700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735366014720, -5621100547107843000, 140737488342192, 140735366015424, 140737354125376, 3, 5621288564710052936, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 18 (Thread 0x7fff81ffb700 (LWP 22656)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007fffd44ffb33 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
No symbol table info available.
#2  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff81ffb700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735374407424, -5621100547107843000, 140737303531936, 140735374408128, 140737354125376, 3, 5621289664758551624, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#4  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 17 (Thread 0x7fff827fc700 (LWP 22655)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ffff54e3f4d in QWaitConditionPrivate::wait (this=0x3b82550, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:136
        code = 0
#2  0x00007ffff54e3cf7 in QWaitCondition::wait (this=0x3b82288, mutex=0x3b82280, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
        __PRETTY_FUNCTION__ = "bool QWaitCondition::wait(QMutex*, long unsigned int)"
        returnValue = false
#3  0x00007fffe7326d69 in QSGRenderThreadEventQueue::takeEvent (this=0x3b82278, wait=true) at scenegraph/qsgthreadedrenderloop.cpp:252
        e = 0x3b824a0
#4  0x00007fffe732501d in QSGRenderThread::processEventsAndWaitForMore (this=0x3b82200) at scenegraph/qsgthreadedrenderloop.cpp:637
        e = 0x3b82460
#5  0x00007fffe73251de in QSGRenderThread::run (this=0x3b82200) at scenegraph/qsgthreadedrenderloop.cpp:667
No locals.
#6  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x3b82200) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x3b82200, __do_it = 1, __cancel_type = 0}
        thr = 0x3b82200
        data = 0x3b82460
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#7  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff827fc700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735382800128, -5621100547107843000, 140737488342192, 140735382800832, 140737354125376, 3, 5621286366760539208, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 16 (Thread 0x7fff82ffd700 (LWP 22654)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007fffd44ffb33 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
No symbol table info available.
#2  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff82ffd700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735391192832, -5621100547107843000, 140737303531936, 140735391193536, 140737354125376, 3, 5621287462514070600, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#4  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 15 (Thread 0x7fff837fe700 (LWP 22653)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ffff54e3f4d in QWaitConditionPrivate::wait (this=0x3b83b30, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:136
        code = 0
#2  0x00007ffff54e3cf7 in QWaitCondition::wait (this=0x3b839c8, mutex=0x3b839c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
        __PRETTY_FUNCTION__ = "bool QWaitCondition::wait(QMutex*, long unsigned int)"
        returnValue = false
#3  0x00007fffe7326d69 in QSGRenderThreadEventQueue::takeEvent (this=0x3b839b8, wait=true) at scenegraph/qsgthreadedrenderloop.cpp:252
        e = 0x3b81f60
#4  0x00007fffe732501d in QSGRenderThread::processEventsAndWaitForMore (this=0x3b83940) at scenegraph/qsgthreadedrenderloop.cpp:637
        e = 0x3b81f20
#5  0x00007fffe73251de in QSGRenderThread::run (this=0x3b83940) at scenegraph/qsgthreadedrenderloop.cpp:667
No locals.
#6  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x3b83940) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x3b83940, __do_it = 1, __cancel_type = 0}
        thr = 0x3b83940
        data = 0x3b81f20
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#7  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff837fe700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735399585536, -5621100547107843000, 140737488342192, 140735399586240, 140737354125376, 3, 5621284164516058184, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 14 (Thread 0x7fff83fff700 (LWP 22652)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007fffd44ffb33 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
No symbol table info available.
#2  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff83fff700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735407978240, -5621100547107843000, 140737303531936, 140735407978944, 140737354125376, 3, 5621285264564556872, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#4  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 13 (Thread 0x7fff89607700 (LWP 22651)):
#0  0x00007ffff4552e33 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        _a3 = -1
        _a1 = 52934608
        resultvar = <optimized out>
        _a2 = 1
        oldtype = 0
        result = <optimized out>
#1  0x00007ffff2e09624 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007ffff2e09744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007ffff57c9f5d in QEventDispatcherGlib::processEvents (this=0x3279d90, flags=...) at kernel/qeventdispatcher_glib.cpp:426
        d = 0x327ade0
        canWait = true
        savedFlags = {i = 0}
        result = false
#4  0x00007ffff574d4fe in QEventLoop::processEvents (this=0x7fff89606da0, flags=...) at kernel/qeventloop.cpp:136
        d = 0x327cd90
#5  0x00007ffff574d7eb in QEventLoop::exec (this=0x7fff89606da0, flags=...) at kernel/qeventloop.cpp:212
        locker = {val = 52931136}
        __PRETTY_FUNCTION__ = "int QEventLoop::exec(QEventLoop::ProcessEventsFlags)"
        ref = {d = 0x327cd90, locker = @0x7fff89606d20, exceptionCaught = true}
        app = 0x7fffffffdc70
        d = 0x327cd90
#6  0x00007ffff54db2ae in QThread::exec (this=0x327a940) at thread/qthread.cpp:509
        d = 0x327a9d0
        locker = {val = 52931136}
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff5c51070, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x327cd90}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff59555a0, data = 0x7ffff5955600, static_metacall = 0x7ffff58255a4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = 32767
#7  0x00007fffe6d09fa1 in QQmlThreadPrivate::run (this=0x327a940) at qml/ftw/qqmlthread.cpp:148
No locals.
#8  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x327a940) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x327a940, __do_it = 1, __cancel_type = 0}
        thr = 0x327a940
        data = 0x327aaf0
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#9  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff89607700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735498188544, -5621100547107843000, 140737488337984, 140735498189248, 140737354125376, 3, 5621270880719082568, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#11 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 12 (Thread 0x7fff8a678700 (LWP 22650)):
#0  0x00007ffff4552e33 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        _a3 = -1
        _a1 = 45789568
        resultvar = <optimized out>
        _a2 = 1
        oldtype = 0
        result = <optimized out>
#1  0x00007ffff2e09624 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007ffff2e09744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007ffff57c9f5d in QEventDispatcherGlib::processEvents (this=0x2b9a510, flags=...) at kernel/qeventdispatcher_glib.cpp:426
        d = 0x2b9b4a0
        canWait = true
        savedFlags = {i = 0}
        result = false
#4  0x00007ffff574d4fe in QEventLoop::processEvents (this=0x7fff8a677da0, flags=...) at kernel/qeventloop.cpp:136
        d = 0x2bab0a0
#5  0x00007ffff574d7eb in QEventLoop::exec (this=0x7fff8a677da0, flags=...) at kernel/qeventloop.cpp:212
        locker = {val = 45723904}
        __PRETTY_FUNCTION__ = "int QEventLoop::exec(QEventLoop::ProcessEventsFlags)"
        ref = {d = 0x2bab0a0, locker = @0x7fff8a677d20, exceptionCaught = true}
        app = 0x7fffffffdc70
        d = 0x2bab0a0
#6  0x00007ffff54db2ae in QThread::exec (this=0x2b9b000) at thread/qthread.cpp:509
        d = 0x2b9b090
        locker = {val = 45723904}
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff5c51070, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x2bab0a0}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff59555a0, data = 0x7ffff5955600, static_metacall = 0x7ffff58255a4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = 32767
#7  0x00007fffe6d09fa1 in QQmlThreadPrivate::run (this=0x2b9b000) at qml/ftw/qqmlthread.cpp:148
No locals.
#8  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x2b9b000) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x2b9b000, __do_it = 1, __cancel_type = 0}
        thr = 0x2b9b000
        data = 0x2b9b1b0
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#9  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff8a678700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735515428608, -5621100547107843000, 140737488337984, 140735515429312, 140737354125376, 3, 5621268708002501704, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#11 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 11 (Thread 0x7fff8b679700 (LWP 22649)):
#0  0x00007ffff4552e33 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        _a3 = -1
        _a1 = 45747344
        resultvar = <optimized out>
        _a2 = 1
        oldtype = 0
        result = <optimized out>
#1  0x00007ffff2e09624 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007ffff2e09744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007ffff57c9f5d in QEventDispatcherGlib::processEvents (this=0x1c1d1e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
        d = 0x985560
        canWait = true
        savedFlags = {i = 0}
        result = false
#4  0x00007ffff574d4fe in QEventLoop::processEvents (this=0x7fff8b678da0, flags=...) at kernel/qeventloop.cpp:136
        d = 0x2ba0bb0
#5  0x00007ffff574d7eb in QEventLoop::exec (this=0x7fff8b678da0, flags=...) at kernel/qeventloop.cpp:212
        locker = {val = 38931136}
        __PRETTY_FUNCTION__ = "int QEventLoop::exec(QEventLoop::ProcessEventsFlags)"
        ref = {d = 0x2ba0bb0, locker = @0x7fff8b678d20, exceptionCaught = true}
        app = 0x7fffffffdc70
        d = 0x2ba0bb0
#6  0x00007ffff54db2ae in QThread::exec (this=0x255b1a0) at thread/qthread.cpp:509
        d = 0x2520a50
        locker = {val = 38931136}
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff5c51070, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x2ba0bb0}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff59555a0, data = 0x7ffff5955600, static_metacall = 0x7ffff58255a4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = 32767
#7  0x00007fffe6d09fa1 in QQmlThreadPrivate::run (this=0x255b1a0) at qml/ftw/qqmlthread.cpp:148
No locals.
#8  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x255b1a0) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x255b1a0, __do_it = 1, __cancel_type = 0}
        thr = 0x255b1a0
        data = 0x98f9b0
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#9  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff8b679700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735532209920, -5621100547107843000, 140737488337952, 140735532210624, 140737354125376, 3, 5621266505221149768, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#11 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 10 (Thread 0x7fff8c12b700 (LWP 22635)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ffff54e3f4d in QWaitConditionPrivate::wait (this=0x1a8aba0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:136
        code = 0
#2  0x00007ffff54e3cf7 in QWaitCondition::wait (this=0x1a8a978, mutex=0x1a8a970, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
        __PRETTY_FUNCTION__ = "bool QWaitCondition::wait(QMutex*, long unsigned int)"
        returnValue = false
#3  0x00007fffe7326d69 in QSGRenderThreadEventQueue::takeEvent (this=0x1a8a968, wait=true) at scenegraph/qsgthreadedrenderloop.cpp:252
        e = 0x3b86f90
#4  0x00007fffe732501d in QSGRenderThread::processEventsAndWaitForMore (this=0x1a8a8f0) at scenegraph/qsgthreadedrenderloop.cpp:637
        e = 0x3b86f90
#5  0x00007fffe73251de in QSGRenderThread::run (this=0x1a8a8f0) at scenegraph/qsgthreadedrenderloop.cpp:667
No locals.
#6  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x1a8a8f0) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x1a8a8f0, __do_it = 1, __cancel_type = 0}
        thr = 0x1a8a8f0
        data = 0x1a8aab0
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#7  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff8c12b700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735543424768, -5621100547107843000, 140737488338784, 140735543425472, 140737354125376, 3, 5621282818580681800, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 9 (Thread 0x7fff8c92c700 (LWP 22634)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007fffd44ffb33 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
No symbol table info available.
#2  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff8c92c700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735551817472, -5621100547107843000, 140737303531936, 140735551818176, 140737354125376, 3, 5621283918629180488, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#4  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 8 (Thread 0x7fff8d980700 (LWP 22629)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:216
No locals.
#1  0x00007ffff54e3ef7 in QWaitConditionPrivate::wait_relative (this=0x670070, time=30000) at thread/qwaitcondition_unix.cpp:126
        ti = {tv_sec = 20576, tv_nsec = 963909905}
#2  0x00007ffff54e3f31 in QWaitConditionPrivate::wait (this=0x670070, time=30000) at thread/qwaitcondition_unix.cpp:134
        code = 0
#3  0x00007ffff54e3cf7 in QWaitCondition::wait (this=0x651b98, mutex=0x651b90, time=30000) at thread/qwaitcondition_unix.cpp:208
        __PRETTY_FUNCTION__ = "bool QWaitCondition::wait(QMutex*, long unsigned int)"
        returnValue = false
#4  0x00007ffff54dc500 in QThreadPoolThread::run (this=0x1a9faf0) at thread/qthreadpool.cpp:134
        r = 0x0
        expired = false
        locker = {val = 6626193}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#5  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x1a9faf0) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x1a9faf0, __do_it = 1, __cancel_type = 0}
        thr = 0x1a9faf0
        data = 0x1ab28d0
        objectName = {static null = {<No data fields>}, d = 0x1ab19d0}
#6  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff8d980700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735568938752, -5621100547107843000, 140737488344048, 140735568939456, 140737354125376, 3, 5621281760408114248, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#8  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 7 (Thread 0x7fff8eed8700 (LWP 22602)):
#0  0x00007ffff4552e33 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        _a3 = -1
        _a1 = 22907376
        resultvar = <optimized out>
        _a2 = 3
        oldtype = 0
        result = <optimized out>
#1  0x00007ffff2e09624 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007ffff2e09744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007ffff57c9f7d in QEventDispatcherGlib::processEvents (this=0x15d2d50, flags=...) at kernel/qeventdispatcher_glib.cpp:428
        d = 0x15d1800
        canWait = true
        savedFlags = {i = 0}
        result = false
#4  0x00007ffff574d4fe in QEventLoop::processEvents (this=0x7fff8eed7ce0, flags=...) at kernel/qeventloop.cpp:136
        d = 0x15d9540
#5  0x00007ffff574d7eb in QEventLoop::exec (this=0x7fff8eed7ce0, flags=...) at kernel/qeventloop.cpp:212
        locker = {val = 22880560}
        __PRETTY_FUNCTION__ = "int QEventLoop::exec(QEventLoop::ProcessEventsFlags)"
        ref = {d = 0x15d9540, locker = @0x7fff8eed7c60, exceptionCaught = true}
        app = 0x7fffffffdc70
        d = 0x15d9540
#6  0x00007ffff54db2ae in QThread::exec (this=0x15d23b0) at thread/qthread.cpp:509
        d = 0x15d20c0
        locker = {val = 22880560}
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff5c51070, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x15d9540}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff59555a0, data = 0x7ffff5955600, static_metacall = 0x7ffff58255a4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = 39413
#7  0x00007fffe6d223a0 in QQmlDebugServerThread::run (this=0x15d23b0) at debugger/qqmldebugserver.cpp:237
        server = 0x15d1400
        connection = 0x708fa0
        __PRETTY_FUNCTION__ = "virtual void QQmlDebugServerThread::run()"
        eventLoop = {<QObject> = {_vptr.QObject = 0x7fff8eed7d60, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x7ffff594b340}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff59555a0, data = 0x7ffff5955600, static_metacall = 0x7ffff58255a4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
#8  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x15d23b0) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x15d23b0, __do_it = 1, __cancel_type = 0}
        thr = 0x15d23b0
        data = 0x15d1600
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#9  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff8eed8700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735591319296, -5621100547107843000, 140737488343472, 140735591320000, 140737354125376, 3, 5621278552067544136, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#11 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 6 (Thread 0x7fff8fffd700 (LWP 22601)):
#0  0x00007ffff4552e33 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        _a3 = -1
        _a1 = 15511456
        resultvar = <optimized out>
        _a2 = 1
        oldtype = 0
        result = <optimized out>
#1  0x00007ffff2e09624 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007ffff2e09744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007ffff57c9f5d in QEventDispatcherGlib::processEvents (this=0xeca4e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
        d = 0xe97100
        canWait = true
        savedFlags = {i = 0}
        result = false
#4  0x00007ffff574d4fe in QEventLoop::processEvents (this=0x7fff8fffcda0, flags=...) at kernel/qeventloop.cpp:136
        d = 0xec5170
#5  0x00007ffff574d7eb in QEventLoop::exec (this=0x7fff8fffcda0, flags=...) at kernel/qeventloop.cpp:212
        locker = {val = 15316608}
        __PRETTY_FUNCTION__ = "int QEventLoop::exec(QEventLoop::ProcessEventsFlags)"
        ref = {d = 0xec5170, locker = @0x7fff8fffcd20, exceptionCaught = true}
        app = 0x7fffffffdc70
        d = 0xec5170
#6  0x00007ffff54db2ae in QThread::exec (this=0xe9b580) at thread/qthread.cpp:509
        d = 0xe9b610
        locker = {val = 15316608}
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff5c51070, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0xec5170}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff59555a0, data = 0x7ffff5955600, static_metacall = 0x7ffff58255a4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = 0
#7  0x00007fffe6d09fa1 in QQmlThreadPrivate::run (this=0xe9b580) at qml/ftw/qqmlthread.cpp:148
No locals.
#8  0x00007ffff54e2748 in QThreadPrivate::start (arg=0xe9b580) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0xe9b580, __do_it = 1, __cancel_type = 0}
        thr = 0xe9b580
        data = 0xe9b1c0
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#9  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fff8fffd700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735609296640, -5621100547107843000, 140737488344176, 140735609297344, 140737354125376, 3, 5621276467397792840, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#11 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 4 (Thread 0x7fffd5c69700 (LWP 22591)):
#0  0x00007ffff4552e33 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        _a3 = -1
        _a1 = 12668400
        resultvar = <optimized out>
        _a2 = 1
        oldtype = 0
        result = <optimized out>
#1  0x00007ffff2e09624 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007ffff2e09744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007ffff57c9f7d in QEventDispatcherGlib::processEvents (this=0xc14d60, flags=...) at kernel/qeventdispatcher_glib.cpp:428
        d = 0xc15cc0
        canWait = true
        savedFlags = {i = 0}
        result = false
#4  0x00007ffff574d4fe in QEventLoop::processEvents (this=0x7fffd5c68da0, flags=...) at kernel/qeventloop.cpp:136
        d = 0xc16630
#5  0x00007ffff574d7eb in QEventLoop::exec (this=0x7fffd5c68da0, flags=...) at kernel/qeventloop.cpp:212
        locker = {val = 12668992}
        __PRETTY_FUNCTION__ = "int QEventLoop::exec(QEventLoop::ProcessEventsFlags)"
        ref = {d = 0xc16630, locker = @0x7fffd5c68d20, exceptionCaught = true}
        app = 0x7fffffffdc70
        d = 0xc16630
#6  0x00007ffff54db2ae in QThread::exec (this=0xc146c0) at thread/qthread.cpp:509
        d = 0xc14fd0
        locker = {val = 12668992}
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff5c51070, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0xc16630}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff59555a0, data = 0x7ffff5955600, static_metacall = 0x7ffff58255a4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = 0
#7  0x00007ffff54db454 in QThread::run (this=0xc146c0) at thread/qthread.cpp:576
No locals.
#8  0x00007ffff54e2748 in QThreadPrivate::start (arg=0xc146c0) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0xc146c0, __do_it = 1, __cancel_type = 0}
        thr = 0xc146c0
        data = 0xc150f0
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#9  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fffd5c69700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140736779949824, -5621100547107843000, 140737488345008, 140736779950528, 140737354125376, 3, 5621193104230061128, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#11 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 3 (Thread 0x7fffd646a700 (LWP 22587)):
#0  0x00007ffff4557573 in select () at ../sysdeps/unix/syscall-template.S:82
No locals.
#1  0x00007ffff56e2b26 in QProcessManager::run (this=0x65e3f0) at io/qprocess_unix.cpp:272
        readset = {fds_bits = {256, 0 <repeats 15 times>}}
        nselect = 1
        c = 0 '\000'
#2  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x65e3f0) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x65e3f0, __do_it = 1, __cancel_type = 0}
        thr = 0x65e3f0
        data = 0x652e70
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#3  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fffd646a700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140736788342528, -5621100547107843000, 140737488343776, 140736788343232, 140737354125376, 3, 5621189806232048712, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#4  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 2 (Thread 0x7fffecefd700 (LWP 22514)):
#0  0x00007ffff4552e33 in *__GI___poll (fds=<optimized out>, fds@entry=0x7fffecefcd60, nfds=<optimized out>, nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        _a3 = -1
        _a1 = 140737168526688
        resultvar = <optimized out>
        _a2 = 1
        oldtype = 0
        result = <optimized out>
#1  0x00007ffff1c171c2 in _xcb_conn_wait (c=c@entry=0x629c90, cond=cond@entry=0x629cd0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:400
        ret = <optimized out>
        fd = {fd = 5, events = 1, revents = 0}
#2  0x00007ffff1c1893f in xcb_wait_for_event (c=0x629c90) at ../../src/xcb_in.c:522
        ret = 0x0
#3  0x00007fffefbbfe03 in QXcbEventReader::run (this=0x635410) at qxcbconnection.cpp:1008
        event = 0x0
#4  0x00007ffff54e2748 in QThreadPrivate::start (arg=0x635410) at thread/qthread_unix.cpp:345
        __clframe = {__cancel_routine = 0x7ffff54e27de <QThreadPrivate::finish(void*)>, __cancel_arg = 0x635410, __do_it = 1, __cancel_type = 32767}
        thr = 0x635410
        data = 0x635770
        objectName = {static null = {<No data fields>}, d = 0x7ffff582eca0}
#5  0x00007ffff4fb2b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fffecefd700
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737168529152, -5621100547107843000, 140737488343168, 140737168529856, 140737354125376, 3, 5621071820796073032, 5621124707770045512}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007ffff455da7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#7  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 1 (Thread 0x7ffff0042740 (LWP 22511)):
#0  0x00007fffe6b43314 in QV4::Object::put (this=0x0, name=..., v=...) at /home/ulf/dev/qt5/qtbase/include/QtQml/5.2.0/QtQml/private/../../../../../../qtdeclarative/src/qml/jsruntime/qv4object_p.h:288
No locals.
#1  0x00007fffe6b533e4 in QV4::__qmljs_set_property (ctx=0x7fffffffc500, object=..., name=..., value=...) at jsruntime/qv4runtime.cpp:536
        scope = {engine = 0x2baba00, mark = 0x7fff89678788, size = 1}
        o = {ptr = 0x7fff89678788}
#2  0x00007fffe6bec666 in QQmlJS::Moth::VME::run (this=0x7fffffffc4a7, context=0x7fffffffc500, code=0x39887c0 "\230$\277\346\377\177", stack=0x7fff896780d0, stackSize=215, storeJumpTable=0x0) at jsruntime/qv4vme_moth.cpp:304
        instr = @0x39887a0: {code = 0x7fffe6bec505, breakPoint = 0, name = 10, base = {scope = 1, index = 2}, source = {scope = 1, index = 3}}
        genericInstr = 0x39887a0
        runtimeStrings = 0x397d0f0
        exceptionHandler = 0x0
        debugger = 0x3278570
        scopeDepth = 3
        scopes = 0x7fffffffb8b0
#3  0x00007fffe6bf275a in QQmlJS::Moth::VME::exec (ctxt=0x7fffffffc500, code=0x3988538 "\032˾\346\377\177") at jsruntime/qv4vme_moth.cpp:707
        vme = {<No data fields>}
        debugger = 0x3278570
        retVal = 45791744
#4  0x00007fffe6b8acba in QV4::Function::code (this=0x3984fe0, ctx=0x7fffffffc500, data=0x3988538 "\032˾\346\377\177") at jsruntime/qv4function_p.h:89
No locals.
#5  0x00007fffe6b89f37 in QV4::SimpleScriptFunction::call (that=0x7fff89658fc0, callData=0x7fff89678008) at jsruntime/qv4functionobject.cpp:594
        v4 = 0x2baba00
        context = 0x2baf930
        ctx = {<QV4::ExecutionContext> = {type = QV4::ExecutionContext::Type_SimpleCallContext, strictMode = false, marked = false, callData = 0x7fff89678008, engine = 0x2baba00, parent = 0x2baf930, outer = 0x3988480, lookups = 0x0, compilationUnit = 0x3970b00, next = 0x7fffffffc590, currentEvalCode = 0x0, interpreterInstructionPointer = 0x7fffffffb928, jitInstructionPointer = 0x0}, function = 0x7fff89658fc0, realArgumentCount = 48, locals = 0x7fff89678058, activation = 0x0}
        ctxSaver = {engine = 0x2baba00, savedContext = 0x2baf930}
        f = 0x7fff89658fc0
        scope = {engine = 0x2baba00, mark = 0x7fff89678058, size = 10039056}
#6  0x00007fffe6b434cf in QV4::FunctionObject::call (this=0x7fff89658fc0, callData=0x7fff89678008) at jsruntime/qv4functionobject_p.h:130
No locals.
#7  0x00007fffe6ce8f80 in QQmlJavaScriptExpression::evaluate (this=0x3985eb0, context=0x3987a70, function=..., callData=0x7fff89678008, isUndefined=0x0) at qml/qqmljavascriptexpression.cpp:166
        lastPropertyCapture = 0x0
        v4 = 0x2baba00
        ctx = 0x2baf930
        __PRETTY_FUNCTION__ = "QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(QQmlContextData*, QV4::ValueRef, QV4::CallData*, bool*)"
        ep = 0x2b9ad50
        capture = {<QQmlEnginePrivate::PropertyCapture> = {_vptr.PropertyCapture = 0x7fffe714f3b0}, engine = 0x2b9a070, expression = 0x3985eb0, guards = {_first = 0x0, _last = 0x0, _flag = 0, _count = 0}, errorString = 0x0}
        watcher = {_c = 0x396fb70, _w = 0x7fffffffc6c0, _s = 0x3985eb0}
        scope = {engine = 0x2baba00, mark = 0x7fff89678048, size = -14654}
        result = {ptr = 0x7fff89678048}
#8  0x00007fffe6c6e40d in QQmlBoundSignalExpression::evaluate (this=0x3985e90, a=0x7fffffffcce0) at qml/qqmlboundsignal.cpp:226
        engine = 0x2b9bf00
        methodIndex = 41
        callData = {ptr = 0x7fff89678008}
        dummy = {a = 9, s = 0, ptr = 0x7fffffffc7b0, {array = "\000\000\000\000\377\177\000\000\303\323[\365\377\177\000\000\000\000\000\000\377\177\000\000\324vK\365\377\177\000\000\000\000\000", q_for_alignment_1 = 140733193388032, q_for_alignment_2 = 6.9531436082559078e-310}}
        argsTypes = 0x396e650
        argCount = 1
        f = {ptr = 0x7fff89678000}
        ep = 0x2b9ad50
        scope = {engine = 0x2baba00, mark = 0x7fff89678000, size = -14167}
#9  0x00007fffe6c6ea58 in QQmlBoundSignal_callback (e=0x39846d8, a=0x7fffffffcce0) at qml/qqmlboundsignal.cpp:353
        s = 0x39846c0
        prof = {enabled = false}
#10 0x00007fffe6cc705d in QQmlNotifier::emitNotify (endpoint=0x39846d8, a=0x7fffffffcce0) at qml/qqmlnotifier.cpp:81
        originalSenderPtr = 60226416
        disconnectWatch = 0x7fffffffca30
#11 0x00007fffe6c0db7e in QQmlData::signalEmitted (object=0x396fb70, index=29, a=0x7fffffffcce0) at qml/qqmlengine.cpp:703
        ep = 0x39846d8
        ddata = 0x396fb90
        __PRETTY_FUNCTION__ = "static void QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**)"
#12 0x00007ffff5793487 in QMetaObject::activate (sender=0x396fb70, signalOffset=29, local_signal_index=0, argv=0x7fffffffcce0) at kernel/qobject.cpp:3423
        signal_index = 29
        empty_argv = {0x7fffffffcc50}
        currentThreadId = 0x7fffffffcc90
        __PRETTY_FUNCTION__ = "static void QMetaObject::activate(QObject*, int, int, void**)"
#13 0x00007ffff57932bc in QMetaObject::activate (sender=0x396fb70, m=0x7fffe785a3e0, local_signal_index=0, argv=0x7fffffffcce0) at kernel/qobject.cpp:3405
No locals.
#14 0x00007fffe74eb97b in QQuickCanvasItem::paint (this=0x396fb70, _t1=...) at .moc/moc_qquickcanvasitem_p.cpp:423
        _a = {0x0, 0x7fffffffce90}
#15 0x00007fffe7474426 in QQuickCanvasItem::updatePolish (this=0x396fb70) at items/context2d/qquickcanvasitem.cpp:679
        d = 0x397ce30
#16 0x00007fffe7353ba7 in QQuickWindowPrivate::polishItems (this=0x2b9a2a0) at items/qquickwindow.cpp:260
        item = 0x396fb70
        it = {i = {i = 0x2474080}}
        itms = {q_hash = {{d = 0x987700, e = 0x987700}}}
        maxPolishCycles = 99999
        __PRETTY_FUNCTION__ = "void QQuickWindowPrivate::polishItems()"
#17 0x00007fffe7326299 in QSGThreadedRenderLoop::polishAndSync (this=0xe975e0, w=0x3b7b170) at scenegraph/qsgthreadedrenderloop.cpp:1055
        timer = {t1 = 15300064, t2 = 7220068}
        polishTime = 0
        waitTime = 0
        syncTime = 0
        profileFrames = false
        __PRETTY_FUNCTION__ = "void QSGThreadedRenderLoop::polishAndSync(QSGThreadedRenderLoop::Window*)"
        d = 0x2b9a2a0
#18 0x00007fffe7326703 in QSGThreadedRenderLoop::event (this=0xe975e0, e=0x7fffffffd860) at scenegraph/qsgthreadedrenderloop.cpp:1138
        w = 0x3b7b170
        te = 0x7fffffffd860
#19 0x00007ffff6dab2f6 in QApplicationPrivate::notify_helper (this=0x61c640, receiver=0xe975e0, e=0x7fffffffd860) at kernel/qapplication.cpp:3467
        consumed = false
#20 0x00007ffff6da87d7 in QApplication::notify (this=0x7fffffffdc70, receiver=0xe975e0, e=0x7fffffffd860) at kernel/qapplication.cpp:2888
        d = 0x61c640
        __PRETTY_FUNCTION__ = "virtual bool QApplication::notify(QObject*, QEvent*)"
        res = false
#21 0x00007ffff5750932 in QCoreApplication::notifyInternal (this=0x7fffffffdc70, receiver=0xe975e0, event=0x7fffffffd860) at kernel/qcoreapplication.cpp:878
        threadData = 0x61b400
        loopLevelCounter = {threadData = 0x61b400}
        result = false
        cbdata = {0xe975e0, 0x7fffffffd860, 0x7fffffffd7ef}
        d = 0xecaf20
#22 0x00007ffff575460f in QCoreApplication::sendEvent (receiver=0xe975e0, event=0x7fffffffd860) at kernel/qcoreapplication.h:232
No locals.
#23 0x00007ffff57c8234 in QTimerInfoList::activateTimers (this=0x65a160) at kernel/qtimerinfo_unix.cpp:643
        e = {<QEvent> = {_vptr.QEvent = 0x7ffff5c4d7d0, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff5955aa0, data = 0x7ffff5957420, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}, d = 0x0, t = 1, posted = 0, spont = 0, m_accept = 1, reserved = 0}, id = 42}
        currentTimerInfo = 0x99cf30
        n_act = 1
        maxCount = 1
        currentTime = {tv_sec = 20549, tv_nsec = 11813343}
#24 0x00007ffff57c9592 in timerSourceDispatch (source=0x65a100) at kernel/qeventdispatcher_glib.cpp:185
        timerSource = 0x65a100
#25 0x00007ffff2e09355 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#26 0x00007ffff2e09688 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#27 0x00007ffff2e09744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#28 0x00007ffff57c9f5d in QEventDispatcherGlib::processEvents (this=0x64fa00, flags=...) at kernel/qeventdispatcher_glib.cpp:426
        d = 0x659fc0
        canWait = true
        savedFlags = {i = 0}
        result = false
#29 0x00007fffefc198b2 in QPAEventDispatcherGlib::processEvents (this=0x64fa00, flags=...) at eventdispatchers/qeventdispatcher_glib.cpp:123
No locals.
#30 0x00007ffff574d4fe in QEventLoop::processEvents (this=0x7fffffffdb60, flags=...) at kernel/qeventloop.cpp:136
        d = 0x679e80
#31 0x00007ffff574d7eb in QEventLoop::exec (this=0x7fffffffdb60, flags=...) at kernel/qeventloop.cpp:212
        locker = {val = 6404928}
        __PRETTY_FUNCTION__ = "int QEventLoop::exec(QEventLoop::ProcessEventsFlags)"
        ref = {d = 0x679e80, locker = @0x7fffffffdae0, exceptionCaught = true}
        app = 0x7fffffffdc70
        d = 0x679e80
#32 0x00007ffff575100a in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1131
        threadData = 0x61b400
        __PRETTY_FUNCTION__ = "static int QCoreApplication::exec()"
        eventLoop = {<QObject> = {_vptr.QObject = 0x7ffff5c51070, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x679e80}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff59555a0, data = 0x7ffff5955600, static_metacall = 0x7ffff58255a4 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = 32767
#33 0x00007ffff5d6c79e in QGuiApplication::exec () at kernel/qguiapplication.cpp:1332
No locals.
#34 0x00007ffff6da8085 in QApplication::exec () at kernel/qapplication.cpp:2692
No locals.
#35 0x000000000040f296 in main (argc=1, argv=0x7fffffffe838) at main.cpp:533
        customPluginPaths = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x7ffff58327d0}, d = 0x7ffff58327d0}}, <No data fields>}
        arguments = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x670ff0}, d = 0x670ff0}}, <No data fields>}
        creatorTrPath = @0x7fffffffe040: {static null = {<No data fields>}, d = 0x65d300}
        globalSettings = 0x66fd40
        uiLanguages = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x6554e0}, d = 0x6554e0}}, <No data fields>}
        r = 0
        qtTranslator = {<QObject> = {_vptr.QObject = 0x7ffff5c514f0, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x6725c0}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff5957fc0, data = 0x7ffff5958000, static_metacall = 0x7ffff58264a8 <QTranslator::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        proxyUrl = {d = 0x672040}
        foundAppOptions = {d = 0x7ffff586d780}
        plugins = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x6a8580}, d = 0x6a8580}}
        coreplugin = 0x68c260
        threadCount = 8
        settingsPath = {static null = {<No data fields>}, d = 0x7ffff582eca0}
        it = {c = 0x7fffffffdde0, i = {i = 0x671008}, n = {i = 0x671000}}
        settings = 0x6653f0
        translator = {<QObject> = {_vptr.QObject = 0x7ffff5c514f0, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x672260}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff5957fc0, data = 0x7ffff5958000, static_metacall = 0x7ffff58264a8 <QTranslator::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        pid = -1
        isBlock = false
        app = {<QApplication> = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0x61a1f0, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x61c640}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff5955720, data = 0x7ffff5955940, static_metacall = 0x7ffff58256fc <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, static self = 0x7fffffffdc70}, static staticMetaObject = {d = {superdata = 0x7ffff5c51100, stringdata = 0x7ffff610c800, data = 0x7ffff610cc00, static_metacall = 0x7ffff5d72722 <QGuiApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff6444760, stringdata = 0x7ffff72120a0, data = 0x7ffff72123c0, static_metacall = 0x7ffff6dacc92 <QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff75dbb40, stringdata = 0x414a80, data = 0x414c20, static_metacall = 0x412f7c <SharedTools::QtSingleApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, firstPeer = 8578, instances = 0x65f220, pidPeer = 0x65c600, actWin = 0x0, appId = {static null = {<No data fields>}, d = 0x61c600}, block = false}
        testOptionProvided = false
        pluginManager = {<QObject> = {_vptr.QObject = 0x7ffff7ddb4f0, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff58f1fc0, data = 0x7ffff58f20e0, static_metacall = 0x7ffff5796254 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x660d20}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7ffff593ef80, data = 0x7ffff5948c20, static_metacall = 0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7ffff5c4d920, stringdata = 0x7ffff7bcb7e0, data = 0x7ffff7bcb9c0, static_metacall = 0x7ffff7bc7afc <ExtensionSystem::PluginManager::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        overrideLanguage = {static null = {<No data fields>}, d = 0x7ffff582eca0}
        pluginPaths = {<QList<QString>> = {{p = {static shared_null = {ref = {atomic = {_q_value = -1}}, alloc = 0, begin = 0, end = 0, array = {0x0}}, d = 0x66cea0}, d = 0x66cea0}}, <No data fields>}

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            aalpert Alan Alpert
            ulherman Ulf Hermann
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              Created:
              Updated:
              Resolved: