Bug is back: Now I suspend Mixxx while printing continuous the error message: 

mixxx Default [C/C++ Application]	
	mixxx [5166] [cores: 0,1,3]	
		Thread [27] 5199 [core: 1] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			0x7ffff5ff606b	
			0x7ffff5ff60a9	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [26] 5198 [core: 0] (Suspended : Container)	
			poll() at syscall-template.S:81 0x7ffff1e20f7d	
			0x7ffff7bbc2c5	
			0x7ffff7bbce9b	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [25] 5197 [core: 3] (Suspended : Container)	
			pthread_cond_timedwait@@GLIBC_2.3.2() at pthread_cond_timedwait.S:238 0x7ffff34cc03e	
			thread_sleep() at qthread_unix.cpp:475 0x7ffff56c0b7a	
			QThread::usleep() at qthread_unix.cpp:513 0x7ffff56c1405	
			VSyncThread::run() at vsyncthread.cpp:73 0x992578	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [24] 5196 [core: 1] (Suspended : Container)	
			poll() at syscall-template.S:81 0x7ffff1e20f7d	
			0x7ffff064e6a4	
			g_main_context_iteration() at 0x7ffff064e7ac	
			QEventDispatcherGlib::processEvents() at qeventdispatcher_glib.cpp:424 0x7ffff57eea55	
			QEventLoop::processEvents() at qeventloop.cpp:149 0x7ffff57c05ef	
			QEventLoop::exec() at qeventloop.cpp:204 0x7ffff57c08e5	
			QThread::exec() at qthread.cpp:542 0x7ffff56bf88f	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [23] 5195 [core: 0] (Suspended : Container)	
			poll() at syscall-template.S:81 0x7ffff1e20f7d	
			0x7ffff30b0198	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [22] 5194 [core: 3] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			AnalyserQueue::dequeueNextBlocking() at analyserqueue.cpp:118 0x4afe89	
			AnalyserQueue::run() at analyserqueue.cpp:279 0x4b22be	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [21] 5193 [core: 1] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			BrowseThread::run() at browsethread.cpp:82 0x77be6a	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [20] 5192 [core: 1] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			QSemaphore::acquire() at qsemaphore.cpp:144 0x7ffff56be5eb	
			CachingReaderWorker::run() at cachingreaderworker.cpp:124 0x4cc6f8	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [19] 5191 [core: 1] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			QSemaphore::acquire() at qsemaphore.cpp:144 0x7ffff56be5eb	
			CachingReaderWorker::run() at cachingreaderworker.cpp:124 0x4cc6f8	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [18] 5190 [core: 0] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			QSemaphore::acquire() at qsemaphore.cpp:144 0x7ffff56be5eb	
			CachingReaderWorker::run() at cachingreaderworker.cpp:124 0x4cc6f8	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [17] 5189 [core: 1] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			QSemaphore::acquire() at qsemaphore.cpp:144 0x7ffff56be5eb	
			CachingReaderWorker::run() at cachingreaderworker.cpp:124 0x4cc6f8	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [16] 5188 [core: 1] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			QSemaphore::acquire() at qsemaphore.cpp:144 0x7ffff56be5eb	
			CachingReaderWorker::run() at cachingreaderworker.cpp:124 0x4cc6f8	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [15] 5187 [core: 3] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			QSemaphore::acquire() at qsemaphore.cpp:144 0x7ffff56be5eb	
			CachingReaderWorker::run() at cachingreaderworker.cpp:124 0x4cc6f8	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [14] 5186 [core: 1] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			QSemaphore::acquire() at qsemaphore.cpp:144 0x7ffff56be5eb	
			CachingReaderWorker::run() at cachingreaderworker.cpp:124 0x4cc6f8	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [13] 5185 [core: 3] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			VinylControlProcessor::run() at vinylcontrolprocessor.cpp:130 0x9717c1	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [7] 5179 [core: 0] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			EngineSideChain::run() at enginesidechain.cpp:93 0x71068f	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [6] 5178 [core: 1] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			EngineWorkerScheduler::run() at engineworkerscheduler.cpp:43 0x6f3c46	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [5] 5177 [core: 0] (Suspended : Container)	
			pthread_cond_wait@@GLIBC_2.3.2() at pthread_cond_wait.S:185 0x7ffff34cbc84	
			wait() at qwaitcondition_unix.cpp:86 0x7ffff56c2406	
			QWaitCondition::wait() at qwaitcondition_unix.cpp:158 0x7ffff56c2406	
			StatsManager::run() at statsmanager.cpp:97 0x956efa	
			QThreadPrivate::start() at qthread_unix.cpp:338 0x7ffff56c1f2f	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [3] 5174 [core: 3] (Suspended : Container)	
			poll() at syscall-template.S:81 0x7ffff1e20f7d	
			0x7ffff064e6a4	
			g_main_context_iteration() at 0x7ffff064e7ac	
			0x7ffff064e7f9	
			0x7ffff06730f5	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [2] 5173 [core: 0] (Suspended : Container)	
			poll() at syscall-template.S:81 0x7ffff1e20f7d	
			0x7ffff064e6a4	
			g_main_loop_run() at 0x7ffff064eb0a	
			0x7fffe7bf9b66	
			0x7ffff06730f5	
			start_thread() at pthread_create.c:311 0x7ffff34c7f6e	
			clone() at clone.S:113 0x7ffff1e2d9cd	
		Thread [1] 5166 [core: 1] (Suspended : Signal : SIGINT:Interrupt)	
			__libc_recv() at recv.c:33 0x7ffff34cf067	
			0x7fffeeae930f	
			0x7fffeeae9808	
			0x7ffff2954bf8	
			0x7ffff2954d3e	
			_XEventsQueued() at 0x7ffff295501d	
			XEventsQueued() at 0x7ffff294712b	
			x11EventSourcePrepare() at qguieventdispatcher_glib.cpp:77 0x7ffff67c14a7	
			g_main_context_prepare() at 0x7ffff064dd4d	
			0x7ffff064e5c3	
			<...more frames...>	
	gdb