Thread 9 (Thread 0x7f6d5f7fe700 (LWP 3365)):
#0  0x00007f6d6aa87c5d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x0000000000402dc5 in std::this_thread::sleep_for<long, std::ratio<1l, 1l> > (__rtime=...) at /usr/include/c++/5/thread:292
        __s = {__r = 10}
        __ns = {__r = 0}
        __ts = {tv_sec = 10, tv_nsec = 0}
#2  0x0000000000402a1f in SlowTask::run (this=0x20ad7f0) at ../qtbug54831/main.cpp:14
No locals.
#3  0x00007f6d6ad51586 in QThreadPoolThread::run (this=0x20ad810) at thread/qthreadpool.cpp:93
        autoDelete = true
        r = 0x20ad7f0
        expired = false
        locker = {val = 34252224}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#4  0x00007f6d6ad585bc in QThreadPrivate::start (arg=0x20ad810) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f6d6ad5863a <QThreadPrivate::finish(void*)>, __cancel_arg = 0x20ad810, __do_it = 1, __cancel_type = 0}
        thr = 0x20ad810
        data = 0x20ad960
#5  0x00007f6d6aa7e6fa in start_thread (arg=0x7f6d5f7fe700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6d5f7fe700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140107730380544, -5606622830835499185, 0, 140732377931551, 140107730381248, 0, 5542797279258509135, 5542685885839867727}, 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  0x00007f6d6a21cb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 8 (Thread 0x7f6d5ffff700 (LWP 3364)):
#0  0x00007f6d6aa87c5d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x0000000000402dc5 in std::this_thread::sleep_for<long, std::ratio<1l, 1l> > (__rtime=...) at /usr/include/c++/5/thread:292
        __s = {__r = 10}
        __ns = {__r = 0}
        __ts = {tv_sec = 10, tv_nsec = 0}
#2  0x0000000000402a1f in SlowTask::run (this=0x20ad3b0) at ../qtbug54831/main.cpp:14
No locals.
#3  0x00007f6d6ad51586 in QThreadPoolThread::run (this=0x20ad3d0) at thread/qthreadpool.cpp:93
        autoDelete = true
        r = 0x20ad3b0
        expired = false
        locker = {val = 34252224}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#4  0x00007f6d6ad585bc in QThreadPrivate::start (arg=0x20ad3d0) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f6d6ad5863a <QThreadPrivate::finish(void*)>, __cancel_arg = 0x20ad3d0, __do_it = 1, __cancel_type = 0}
        thr = 0x20ad3d0
        data = 0x20ad520
#5  0x00007f6d6aa7e6fa in start_thread (arg=0x7f6d5ffff700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6d5ffff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140107738773248, -5606622830835499185, 0, 140732377931551, 140107738773952, 0, 5542798379307007823, 5542685885839867727}, 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  0x00007f6d6a21cb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 7 (Thread 0x7f6d648f8700 (LWP 3363)):
#0  0x00007f6d6aa87c5d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x0000000000402dc5 in std::this_thread::sleep_for<long, std::ratio<1l, 1l> > (__rtime=...) at /usr/include/c++/5/thread:292
        __s = {__r = 10}
        __ns = {__r = 0}
        __ts = {tv_sec = 10, tv_nsec = 0}
#2  0x0000000000402a1f in SlowTask::run (this=0x20acf70) at ../qtbug54831/main.cpp:14
No locals.
#3  0x00007f6d6ad51586 in QThreadPoolThread::run (this=0x20acf90) at thread/qthreadpool.cpp:93
        autoDelete = true
        r = 0x20acf70
        expired = false
        locker = {val = 34252224}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#4  0x00007f6d6ad585bc in QThreadPrivate::start (arg=0x20acf90) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f6d6ad5863a <QThreadPrivate::finish(void*)>, __cancel_arg = 0x20acf90, __do_it = 1, __cancel_type = 0}
        thr = 0x20acf90
        data = 0x20ad0e0
#5  0x00007f6d6aa7e6fa in start_thread (arg=0x7f6d648f8700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6d648f8700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140107815290624, -5606622830835499185, 0, 140732377931551, 140107815291328, 0, 5542681148711534415, 5542685885839867727}, 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  0x00007f6d6a21cb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 6 (Thread 0x7f6d650f9700 (LWP 3362)):
#0  0x00007f6d6aa87c5d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x0000000000402dc5 in std::this_thread::sleep_for<long, std::ratio<1l, 1l> > (__rtime=...) at /usr/include/c++/5/thread:292
        __s = {__r = 10}
        __ns = {__r = 0}
        __ts = {tv_sec = 10, tv_nsec = 0}
#2  0x0000000000402a1f in SlowTask::run (this=0x20acb30) at ../qtbug54831/main.cpp:14
No locals.
#3  0x00007f6d6ad51586 in QThreadPoolThread::run (this=0x20acb50) at thread/qthreadpool.cpp:93
        autoDelete = true
        r = 0x20acb30
        expired = false
        locker = {val = 34252224}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#4  0x00007f6d6ad585bc in QThreadPrivate::start (arg=0x20acb50) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f6d6ad5863a <QThreadPrivate::finish(void*)>, __cancel_arg = 0x20acb50, __do_it = 1, __cancel_type = 0}
        thr = 0x20acb50
        data = 0x20acca0
#5  0x00007f6d6aa7e6fa in start_thread (arg=0x7f6d650f9700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6d650f9700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140107823683328, -5606622830835499185, 0, 140732377931551, 140107823684032, 0, 5542677846418554703, 5542685885839867727}, 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  0x00007f6d6a21cb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 5 (Thread 0x7f6d658fa700 (LWP 3361)):
#0  0x00007f6d6aa87c5d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x0000000000402dc5 in std::this_thread::sleep_for<long, std::ratio<1l, 1l> > (__rtime=...) at /usr/include/c++/5/thread:292
        __s = {__r = 10}
        __ns = {__r = 0}
        __ts = {tv_sec = 10, tv_nsec = 0}
#2  0x0000000000402a1f in SlowTask::run (this=0x20ac6f0) at ../qtbug54831/main.cpp:14
No locals.
#3  0x00007f6d6ad51586 in QThreadPoolThread::run (this=0x20ac710) at thread/qthreadpool.cpp:93
        autoDelete = true
        r = 0x20ac6f0
        expired = false
        locker = {val = 34252224}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#4  0x00007f6d6ad585bc in QThreadPrivate::start (arg=0x20ac710) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f6d6ad5863a <QThreadPrivate::finish(void*)>, __cancel_arg = 0x20ac710, __do_it = 1, __cancel_type = 0}
        thr = 0x20ac710
        data = 0x20ac860
#5  0x00007f6d6aa7e6fa in start_thread (arg=0x7f6d658fa700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6d658fa700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140107832076032, -5606622830835499185, 0, 140732377931551, 140107832076736, 0, 5542678946467053391, 5542685885839867727}, 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  0x00007f6d6a21cb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 4 (Thread 0x7f6d660fb700 (LWP 3360)):
#0  0x00007f6d6aa87c5d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x0000000000402dc5 in std::this_thread::sleep_for<long, std::ratio<1l, 1l> > (__rtime=...) at /usr/include/c++/5/thread:292
        __s = {__r = 10}
        __ns = {__r = 0}
        __ts = {tv_sec = 10, tv_nsec = 0}
#2  0x0000000000402a1f in SlowTask::run (this=0x20ac2b0) at ../qtbug54831/main.cpp:14
No locals.
#3  0x00007f6d6ad51586 in QThreadPoolThread::run (this=0x20ac2d0) at thread/qthreadpool.cpp:93
        autoDelete = true
        r = 0x20ac2b0
        expired = false
        locker = {val = 34252224}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#4  0x00007f6d6ad585bc in QThreadPrivate::start (arg=0x20ac2d0) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f6d6ad5863a <QThreadPrivate::finish(void*)>, __cancel_arg = 0x20ac2d0, __do_it = 1, __cancel_type = 0}
        thr = 0x20ac2d0
        data = 0x20ac420
#5  0x00007f6d6aa7e6fa in start_thread (arg=0x7f6d660fb700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6d660fb700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140107840468736, -5606622830835499185, 0, 140732377931551, 140107840469440, 0, 5542675648469040975, 5542685885839867727}, 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  0x00007f6d6a21cb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 3 (Thread 0x7f6d5e0fb700 (LWP 3359)):
#0  0x00007f6d6aa87c5d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x0000000000402dc5 in std::this_thread::sleep_for<long, std::ratio<1l, 1l> > (__rtime=...) at /usr/include/c++/5/thread:292
        __s = {__r = 10}
        __ns = {__r = 0}
        __ts = {tv_sec = 10, tv_nsec = 0}
#2  0x0000000000402a1f in SlowTask::run (this=0x20abef0) at ../qtbug54831/main.cpp:14
No locals.
#3  0x00007f6d6ad51586 in QThreadPoolThread::run (this=0x20abf10) at thread/qthreadpool.cpp:93
        autoDelete = true
        r = 0x20abef0
        expired = false
        locker = {val = 34252224}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#4  0x00007f6d6ad585bc in QThreadPrivate::start (arg=0x20abf10) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f6d6ad5863a <QThreadPrivate::finish(void*)>, __cancel_arg = 0x20abf10, __do_it = 1, __cancel_type = 0}
        thr = 0x20abf10
        data = 0x20a92f0
#5  0x00007f6d6aa7e6fa in start_thread (arg=0x7f6d5e0fb700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6d5e0fb700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140107706251008, -5606622830835499185, 0, 140732377931551, 140107706251712, 0, 5542798793771351887, 5542685885839867727}, 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  0x00007f6d6a21cb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 2 (Thread 0x7f6d668fc700 (LWP 3358)):
#0  0x00007f6d6aa87c5d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x0000000000402dc5 in std::this_thread::sleep_for<long, std::ratio<1l, 1l> > (__rtime=...) at /usr/include/c++/5/thread:292
        __s = {__r = 10}
        __ns = {__r = 0}
        __ts = {tv_sec = 10, tv_nsec = 0}
#2  0x0000000000402a1f in SlowTask::run (this=0x20aabe0) at ../qtbug54831/main.cpp:14
No locals.
#3  0x00007f6d6ad51586 in QThreadPoolThread::run (this=0x20a92c0) at thread/qthreadpool.cpp:93
        autoDelete = true
        r = 0x20aabe0
        expired = false
        locker = {val = 34252224}
        __PRETTY_FUNCTION__ = "virtual void QThreadPoolThread::run()"
#4  0x00007f6d6ad585bc in QThreadPrivate::start (arg=0x20a92c0) at thread/qthread_unix.cpp:365
        __clframe = {__cancel_routine = 0x7f6d6ad5863a <QThreadPrivate::finish(void*)>, __cancel_arg = 0x20a92c0, __do_it = 1, __cancel_type = 32621}
        thr = 0x20a92c0
        data = 0x20aa630
#5  0x00007f6d6aa7e6fa in start_thread (arg=0x7f6d668fc700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6d668fc700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140107848861440, -5606622830835499185, 0, 140732377931551, 140107848862144, 0, 5542676748517539663, 5542685885839867727}, 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  0x00007f6d6a21cb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 1 (Thread 0x7f6d6b4c4740 (LWP 3350)):
#0  0x00000000004025dc in QString::QString (this=0x7ffecf6521e0, other=...) at /depot/fkleint/qt-56/qtbase/include/QtCore/../../src/corelib/tools/qstring.h:889
No locals.
#1  0x0000000000402ec8 in QFuture<QString>::result (this=0x7ffecf652220) at /depot/fkleint/qt-56/qtbase/include/QtCore/../../src/corelib/thread/qfuture.h:164
No locals.
#2  0x00000000004021c0 in main (argc=1, argv=0x7ffecf652358) at ../qtbug54831/main.cpp:34
        app = {<QObject> = {_vptr.QObject = 0x7f6d6b2c7380 <vtable for QCoreApplication+16>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f6d6b160940 <qt_meta_stringdata_QObject>, data = 0x7f6d6b160a60 <qt_meta_data_QObject>, static_metacall = 0x7f6d6afedc84 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x2090e50}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f6d6b1af460 <qt_meta_stringdata_Qt>, data = 0x7f6d6b1ba160 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7f6d6b2be640 <QObject::staticMetaObject>, stringdata = 0x7f6d6b1c97a0 <qt_meta_stringdata_QCoreApplication>, data = 0x7f6d6b1c99c0 <qt_meta_data_QCoreApplication>, static_metacall = 0x7f6d6b095c4c <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, static self = 0x7ffecf652210}
        __PRETTY_FUNCTION__ = "int main(int, char**)"
        __FUNCTION__ = "main"