So this should be the call stack:

(gdb) thread apply all bt

Thread 30 (Thread 0x7fff0393f700 (LWP 2442)):
#0  0x00007ffff1dfac6d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff0620fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff06210ec in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff57ec7be in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007ffff57be0af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff57be3a5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007ffff56bac5f in QThread::exec() ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007ffff579f823 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007ffff34a3182 in start_thread (arg=0x7fff0393f700)
    at pthread_create.c:312
#10 0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 29 (Thread 0x7fff84ac8700 (LWP 2436)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
---Type <return> to continue, or q <return> to quit---
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff5ff4ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007ffff5ff5039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007ffff34a3182 in start_thread (arg=0x7fff84ac8700)
    at pthread_create.c:312
#4  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 28 (Thread 0x7fff852c9700 (LWP 2435)):
#0  0x00007ffff1dfac6d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff7bbd9b8 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libportaudio.so.2
#2  0x00007ffff7bbe5e0 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libportaudio.so.2
#3  0x00007ffff34a3182 in start_thread (arg=0x7fff852c9700)
    at pthread_create.c:312
#4  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 27 (Thread 0x7fff8a252700 (LWP 2434)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x0000000000a69132 in VSyncThread::run (this=0x309f5f0)
    at src/waveform/vsyncthread.cpp:102
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fff8a252700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 26 (Thread 0x7fff8b7fe700 (LWP 2433)):
#0  0x00007ffff1dfac6d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff0620fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff06210ec in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff57ec7a1 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007ffff57be0af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff57be3a5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007ffff56bac5f in QThread::exec() ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007ffff34a3182 in start_thread (arg=0x7fff8b7fe700)
    at pthread_create.c:312
#9  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 25 (Thread 0x7fff8bfff700 (LWP 2432)):
#0  0x00007ffff1dfac6d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff308a248 in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007ffff34a3182 in start_thread (arg=0x7fff8bfff700)
    at pthread_create.c:312
#3  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 24 (Thread 0x7fff90e0a700 (LWP 2431)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00000000004b43dc in AnalyserQueue::dequeueNextBlocking (this=this@entry=
    0x2f1cba0) at src/analyserqueue.cpp:121
#3  0x00000000004b6887 in AnalyserQueue::run (this=0x2f1cba0)
---Type <return> to continue, or q <return> to quit---
    at src/analyserqueue.cpp:283
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fff90e0a700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 23 (Thread 0x7fff9160b700 (LWP 2430)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x0000000000847c14 in BrowseThread::run (this=0x2feb600)
    at src/library/browse/browsethread.cpp:83
#3  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007ffff34a3182 in start_thread (arg=0x7fff9160b700)
    at pthread_create.c:312
#5  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 22 (Thread 0x7fffd7fff700 (LWP 2429)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
---Type <return> to continue, or q <return> to quit---
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x2b975b0)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffd7fff700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 21 (Thread 0x7fff937ed700 (LWP 2428)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x295efe0)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fff937ed700)
---Type <return> to continue, or q <return> to quit---
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 20 (Thread 0x7fffa0f09700 (LWP 2427)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x2736db0)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffa0f09700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 19 (Thread 0x7fffa25c1700 (LWP 2426)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x24fe8c0)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffa25c1700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 18 (Thread 0x7fffa3afe700 (LWP 2425)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x22c6480)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffa3afe700)
    at pthread_create.c:312
---Type <return> to continue, or q <return> to quit---
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 17 (Thread 0x7fffb9341700 (LWP 2424)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x208dcd0)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffb9341700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 16 (Thread 0x7fffba744700 (LWP 2423)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
---Type <return> to continue, or q <return> to quit---
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x1e55850)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffba744700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 15 (Thread 0x7fffbc8e5700 (LWP 2422)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x1c20de0)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffbc8e5700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
---Type <return> to continue, or q <return> to quit---
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 14 (Thread 0x7fffbdf9d700 (LWP 2421)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007ffff56b995b in QSemaphore::acquire(int) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3  0x00000000004d17e4 in CachingReaderWorker::run (this=0x19a2e30)
    at src/cachingreaderworker.cpp:128
#4  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffbdf9d700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 13 (Thread 0x7fffbaf45700 (LWP 2420)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x0000000000a47836 in VinylControlProcessor::run (this=0x195f300)
---Type <return> to continue, or q <return> to quit---
    at src/vinylcontrol/vinylcontrolprocessor.cpp:133
#3  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007ffff34a3182 in start_thread (arg=0x7fffbaf45700)
    at pthread_create.c:312
#5  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7fffd67fc700 (LWP 2408)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00000000007de80f in EngineSideChain::run (this=0x12d9ac0)
    at src/engine/sidechain/enginesidechain.cpp:104
#3  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007ffff34a3182 in start_thread (arg=0x7fffd67fc700)
    at pthread_create.c:312
#5  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7fffd6ffd700 (LWP 2407)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
---Type <return> to continue, or q <return> to quit---
#1  0x00007ffff56bd816 in QWaitCondition::wait(QMutex*, unsigned long) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00000000007bfd09 in EngineWorkerScheduler::run (this=0x1277050)
    at src/engine/engineworkerscheduler.cpp:54
#3  0x00007ffff56bd32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007ffff34a3182 in start_thread (arg=0x7fffd6ffd700)
    at pthread_create.c:312
#5  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fffdcc91700 (LWP 2404)):
#0  0x00007ffff1dfac6d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff0620fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff06210ec in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff0621129 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffff0645f15 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffdcc91700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fffdd492700 (LWP 2403)):
---Type <return> to continue, or q <return> to quit---
#0  0x00007ffff1dfac6d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff0620fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff062130a in g_main_loop_run ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fffe4e05e16 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007ffff0645f15 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffff34a3182 in start_thread (arg=0x7fffdd492700)
    at pthread_create.c:312
#6  0x00007ffff1e07fbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7ffff7fab800 (LWP 2399)):
#0  remove (akey=@0x0: <error reading variable>, this=0x2da22c8)
    at /usr/include/qt4/QtCore/qhash.h:791
#1  unlink (n=..., this=<optimized out>) at /usr/include/qt4/QtCore/qcache.h:74
#2  trim (m=4, this=0x2da22b8) at /usr/include/qt4/QtCore/qcache.h:208
#3  QCache<int, QSharedPointer<TrackInfoObject> >::insert (
    this=this@entry=0x2da22b8, akey=@0x7fffffffc76c: 2381, aobject=0x19d10b70, 
    acost=acost@entry=1) at /usr/include/qt4/QtCore/qcache.h:188
#4  0x00000000008b39b4 in TrackDAO::getTrackFromDB (this=this@entry=0x2da2270, 
    id=2381) at src/library/dao/trackdao.cpp:1011
#5  0x00000000008b5003 in TrackDAO::getTrack (this=0x2da2270, 
    id=id@entry=2381, cacheOnly=cacheOnly@entry=false)
---Type <return> to continue, or q <return> to quit---
    at src/library/dao/trackdao.cpp:1076
#6  0x000000000081bf16 in BaseSqlTableModel::setData (this=0x2df2160, 
    index=..., value=..., role=<optimized out>)
    at src/library/basesqltablemodel.cpp:605
#7  0x0000000000924651 in StarDelegate::setModelData (this=<optimized out>, 
    editor=<optimized out>, model=0x2df2160, index=...)
    at src/library/stardelegate.cpp:94
#8  0x00007ffff6c15e4e in QAbstractItemView::commitData(QWidget*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#9  0x00007ffff57d387a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#10 0x00007ffff6d7413f in QAbstractItemDelegate::commitData(QWidget*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#11 0x0000000000924439 in StarDelegate::commitAndCloseEditor (this=0x14985a00)
    at src/library/stardelegate.cpp:103
#12 0x00007ffff57d387a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#13 0x00007ffff676e50a in QWidget::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#14 0x00007ffff671ee2c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007ffff67255dd in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
---Type <return> to continue, or q <return> to quit---
#16 0x0000000000947c89 in MixxxApplication::notify (this=0x7fffffffdf20, 
    target=0x19f64210, event=0x7fffffffd6f0) at src/mixxxapplication.cpp:116
#17 0x00007ffff57bf4dd in QCoreApplication::notifyInternal(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#18 0x00007ffff6724d93 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#19 0x00007ffff67999cb in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#20 0x00007ffff6799269 in QApplication::x11ProcessEvent(_XEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#21 0x00007ffff67c0b02 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#22 0x00007ffff0620e04 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007ffff0621048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007ffff06210ec in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007ffff57ec7a1 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#26 0x00007ffff67c0bb6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#27 0x00007ffff57be0af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#28 0x00007ffff57be3a5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
---Type <return> to continue, or q <return> to quit---
#29 0x00007ffff57c3b79 in QCoreApplication::exec() ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#30 0x0000000000473790 in main (argc=1, argv=<optimized out>)
    at src/main.cpp:350