cordlandwehr@weatherwax:~$ gdb --args python2.7 /usr/bin/calibre GNU gdb (Debian 7.11.1-2+b1) 7.11.1 Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from python2.7...Reading symbols from /usr/lib/debug/.build-id/c7/88c88bbcb974d69e2d5f3847936d96e5ec2c7a.debug...done. done. (gdb) r Starting program: /usr/bin/python2.7 /usr/bin/calibre [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". calibre(4649)/(default) QXcbIntegration::QXcbIntegration: Qt: gdb: -nograb added to command-line options. Use the -dograb option to enforce grabbing. [New Thread 0x7fffdb305700 (LWP 4667)] [New Thread 0x7fffce5d8700 (LWP 4668)] [New Thread 0x7fffc6409700 (LWP 4670)] [Thread 0x7fffc6409700 (LWP 4670) exited] [New Thread 0x7fffc6409700 (LWP 4672)] [New Thread 0x7fffbbfff700 (LWP 4673)] [New Thread 0x7fffbb7fe700 (LWP 4682)] [New Thread 0x7fffbade4700 (LWP 4683)] [New Thread 0x7fffba263700 (LWP 4688)] [New Thread 0x7fffb9a13700 (LWP 4689)] [New Thread 0x7fffb9212700 (LWP 4690)] [New Thread 0x7fffb8a11700 (LWP 4691)] [New Thread 0x7fff73ffd700 (LWP 4692)] [New Thread 0x7fff733fc700 (LWP 4693)] [Thread 0x7fff733fc700 (LWP 4693) exited] [New Thread 0x7fff733fc700 (LWP 4694)] calibre(4649)/(default) qt_assert: ASSERT: "index.isValid()" in file itemviews/qstyleditemdelegate.cpp, line 378 Thread 1 "python2.7" received signal SIGABRT, Aborted. __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58 58 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) th thbreak thread (gdb) thread apply all bt Thread 15 (Thread 0x7fff733fc700 (LWP 4694)): #0 0x00007ffff7bcc577 in do_futex_wait (private=0, abstime=0x0, expected=0, futex_word=0x555555c65e60) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 0x00007ffff7bcc577 in do_futex_wait (sem=sem@entry=0x555555c65e60, abstime=0x0) at sem_waitcommon.c:111 #2 0x00007ffff7bcc624 in __new_sem_wait_slow (sem=0x555555c65e60, abstime=0x0) at sem_waitcommon.c:181 #3 0x000055555562a244 in PyThread_acquire_lock (lock=0x555555c65e60, waitflag=1) at ../Python/thread_pthread.h:324 #4 0x000055555567601a in PyEval_RestoreThread (tstate=0x555559894650) at ../Python/ceval.c:359 #5 0x000055555572193a in sock_accept.lto_priv.2615 (s=0x7fffc0809a08) at ../Modules/socketmodule.c:1747 #6 0x000055555565439f in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fff733fa670) at ../Python/ceval.c:4336 #7 0x000055555565439f in PyEval_EvalFrameEx (f=Frame 0x7fffc0077d00, for file /usr/lib/python2.7/socket.py, line 206, in accept (self=<_socketobject at remote 0x7fffc038a830>), throwflag=0) at ../Python/ceval.c:2989 #8 0x0000555555654a5f in PyEval_EvalFrameEx (nk=, na=, n=, pp_stack=0x7fff733fa7c0, func=) at ../Python/ceval.c:4437 #9 0x0000555555654a5f in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fff733fa7c0) at ../Python/ceval.c:4372 #10 0x0000555555654a5f in PyEval_EvalFrameEx (f= Frame 0x7fffc03b0810, for file /usr/lib/python2.7/multiprocessing/connection.py, line 275, in accept (self=, _family='AF_UNIX', _unlink=, _last_accepted=None) at remote 0x7fffc03b6450>), throwflag=0) at ../Python/ceval.c:2989 #11 0x0000555555654a5f in PyEval_EvalFrameEx (nk=, na=, n=, pp_stack=0x7fff733fa910, func=) at ../Python/ceval.c:4437 #12 0x0000555555654a5f in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fff733fa910) at ../Python/ceval.c:4372 #13 0x0000555555654a5f in PyEval_EvalFrameEx (f=Frame 0x7fffc007cb00, for file /usr/lib/python2.7/multiprocessing/connection.py, line 145, in accept (self=, _family='AF_UNIX', _unlink=, _last_accepted=None) at remote 0x7fffc03b6450>, _authkey='\xa7\xc5\xef\xaf\xb8\xb8)\x9ef\xb9%\x8e\xadG\xeb\xaba\xa0{_]\x8c\xbb\xc9\xf2\x872\xcb\x98 \xc5\x0b') at remote 0x7fffc03b6410>), throwflag=0) at ../Python/ceval.c:2989 #14 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #15 0x000055555566a1a8 in function_call.lto_priv.296 (func=, arg=(, _family='AF_UNIX', _unlink=, _last_accepted=None) at remote 0x7fffc03b6450>, _authkey='\xa7\xc5\xef\xaf\xb8\xb8)\x9ef\xb9%\x8e\xadG\xeb\xaba\xa0{_]\x8c\xbb\xc9\xf2\x872\xcb\x98 \xc5\x0b') at remote 0x7fffc03b6410>,), kw={}) at ../Objects/funcobject.c:523 #16 0x000055555563b8f3 in PyObject_Call (func=, arg=, kw=) at ../Objects/abstract.c:2547 #17 0x000055555568054e in instancemethod_call.lto_priv.215 (func=, arg=(, _family='AF_UNIX', _unlink=, _last_accepted=None) at remote 0x7fffc03b6450>, _authkey='\xa7\xc5\xef\xaf\xb8\xb8)\x9ef\xb9%\x8e\xadG\xeb\xaba\xa0{_]\x8c\xbb\xc9\xf2\x872\xcb\x98 \xc5\x0b') at remote 0x7fffc03b6410>,), kw={}) at ../Objects/classobject.c:2602 #18 0x000055555563b8f3 in PyObject_Call (func=, arg=, kw=) at ../Objects/abstract.c:2547 #19 0x0000555555655cba in PyEval_EvalFrameEx (nk=0, na=1, flags=, pp_stack=0x7fff733fae48, func=) at ../Python/ceval.c:4666 #20 0x0000555555655cba in PyEval_EvalFrameEx (f=Frame 0x7fffc0062e18, for file /usr/lib/calibre/calibre/utils/ipc/server.py, line 119, in accept (self=, _family='AF_UNIX', _unlink=, _last_accepted=None) at remote 0x7fffc03b6450>, _authkey='\xa7\xc5\xef\xaf\xb8\xb8)\x9ef\xb9%\x8e\xadG\xeb\xaba\xa0{_]\x8c\xbb\xc9\xf2\x872\xcb\x98 \xc5\x0b') at remote 0x7fffc03b6410>, args=(), kwargs={}), throwflag=0) at ../Python/ceval.c:3028 #21 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #22 0x000055555566a1a8 in function_call.lto_priv.296 (func=, arg=(, _family='AF_UNIX', _unlink=, _last_accepted=None) at remote 0x7fffc03b6450>, _authkey='\xa7\xc5\xef\xaf\xb8\xb8)\x9ef\xb9%\x8e\xadG\xeb\xaba\xa0{_]\x8c\xbb\xc9\xf2\x872\xcb\x98 \xc5\x0b') at remote 0x7fffc03b6410>,), kw={}) at ../Objects/funcobject.c:523 ---Type to continue, or q to quit--- #23 0x000055555563b8f3 in PyObject_Call (func=, arg=, kw=) at ../Objects/abstract.c:2547 #24 0x0000555555655cba in PyEval_EvalFrameEx (nk=0, na=1, flags=, pp_stack=0x7fff733fb0f8, func=) at ../Python/ceval.c:4666 #25 0x0000555555655cba in PyEval_EvalFrameEx (f=Frame 0x7fffdf28e050, for file /usr/lib/calibre/calibre/utils/ipc/__init__.py, line 22, in eintr_retry_call (func=, args=(), kwargs={}), throwflag=0) at ../Python/ceval.c:3028 #26 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #27 0x000055555565549b in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fff733fb300, func=) at ../Python/ceval.c:4447 #28 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fff733fb300) at ../Python/ceval.c:4372 #29 0x000055555565549b in PyEval_EvalFrameEx (f= Frame 0x7fffc03ad608, for file /usr/lib/calibre/calibre/utils/ipc/pool.py, line 193, in create_worker (self=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6d90>) at remote 0x7fffc03b6090>, results=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b62...(truncated), throwflag=0) at ../Python/ceval.c:2989 #30 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #31 0x000055555565549b in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fff733fb510, func=) at ../Python/ceval.c:4447 #32 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fff733fb510) at ../Python/ceval.c:4372 #33 0x000055555565549b in PyEval_EvalFrameEx (f=Frame 0x7fffc03b7050, for file /usr/lib/calibre/calibre/utils/ipc/pool.py, line 201, in start_worker (self=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6d90>) at remote 0x7fffc03b6090>, results=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b625...(truncated), throwflag=0) at ../Python/ceval.c:2989 #34 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #35 0x000055555565549b in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fff733fb720, func=) at ../Python/ceval.c:4447 #36 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fff733fb720) at ../Python/ceval.c:4372 #37 0x000055555565549b in PyEval_EvalFrameEx (f=Frame 0x7fffc0077790, for file /usr/lib/calibre/calibre/utils/ipc/pool.py, line 215, in run (self=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6d90>) at remote 0x7fffc03b6090>, results=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6250>, mutex...(truncated), throwflag=0) at ../Python/ceval.c:2989 #38 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #39 0x000055555565549b in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fff733fb930, func=) at ../Python/ceval.c:4447 #40 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fff733fb930) at ../Python/ceval.c:4372 #41 0x000055555565549b in PyEval_EvalFrameEx (f=Frame 0x7fff4c000910, for file /usr/lib/python2.7/threading.py, line 801, in __bootstrap_inner (self=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6d90>) at remote 0x7fffc03b6090>, results= to continue, or q to quit--- 360>, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6250>, mu...(truncated), throwflag=0) at ../Python/ceval.c:2989 #42 0x0000555555654a5f in PyEval_EvalFrameEx (nk=, na=, n=, pp_stack=0x7fff733fba80, func=) at ../Python/ceval.c:4437 #43 0x0000555555654a5f in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fff733fba80) at ../Python/ceval.c:4372 #44 0x0000555555654a5f in PyEval_EvalFrameEx (f=Frame 0x7fffc0070910, for file /usr/lib/python2.7/threading.py, line 774, in __bootstrap (self=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6d90>) at remote 0x7fffc03b6090>, results=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6250>, mutex=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #46 0x0000555555669fee in function_call.lto_priv.296 (func=, arg=(, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6d90>) at remote 0x7fffc03b6090>, results=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6250>, mutex=, not_full=<_Condition(_Verbose__verbose=False, _Condition...(truncated), kw=0x0) at ../Objects/funcobject.c:523 #47 0x000055555563b8f3 in PyObject_Call (func=, arg=, kw=) at ../Objects/abstract.c:2547 #48 0x000055555568054e in instancemethod_call.lto_priv.215 (func=, arg=(, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6d90>) at remote 0x7fffc03b6090>, results=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6250>, mutex=, not_full=<_Condition(_Verbose__verbose=False, _Condition...(truncated), kw=0x0) at ../Objects/classobject.c:2602 #49 0x000055555563b8f3 in PyObject_Call (func=, arg=, kw=) at ../Objects/abstract.c:2547 #50 0x0000555555659300 in PyEval_CallObjectWithKeywords (func=, arg=(), kw=) at ../Python/ceval.c:4221 #51 0x00005555557216f2 in t_bootstrap (boot_raw=0x55555a5e4c50) at ../Modules/threadmodule.c:620 #52 0x00007ffff7bc4464 in start_thread (arg=0x7fff733fc700) at pthread_create.c:333 #53 0x00007ffff6fe29df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105 Thread 13 (Thread 0x7fff73ffd700 (LWP 4692)): #0 0x00007ffff7bca18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fffe6a4ca5c in WTF::ThreadCondition::wait(WTF::Mutex&) (this=0x55555a429b80, mutex=...) at wtf/ThreadingPthreads.cpp:378 #2 0x00007fffe674306f in JSC::GCThread::waitForNextPhase() (this=0x5555598a3f60) at heap/GCThread.cpp:81 #3 0x00007fffe6743115 in JSC::GCThread::gcThreadMain() (this=0x5555598a3f60) at heap/GCThread.cpp:99 #4 0x00007fffe6743218 in JSC::GCThread::gcThreadStartFunc(void*) (data=0x5555598a3f60) at heap/GCThread.cpp:135 #5 0x00007fffe6a32984 in WTF::threadEntryPoint(void*) (contextData=0x5555598a9d20) at wtf/Threading.cpp:69 #6 0x00007fffe6a4c27d in WTF::wtfThreadEntryPoint(void*) (param=0x555559c2a3a0) at wtf/ThreadingPthreads.cpp:195 #7 0x00007ffff7bc4464 in start_thread (arg=0x7fff73ffd700) at pthread_create.c:333 #8 0x00007ffff6fe29df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105 ---Type to continue, or q to quit--- Thread 12 (Thread 0x7fffb8a11700 (LWP 4691)): #0 0x00007ffff7bca18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fffe6a4ca5c in WTF::ThreadCondition::wait(WTF::Mutex&) (this=0x55555a429b80, mutex=...) at wtf/ThreadingPthreads.cpp:378 #2 0x00007fffe674306f in JSC::GCThread::waitForNextPhase() (this=0x555559c2fc50) at heap/GCThread.cpp:81 #3 0x00007fffe6743115 in JSC::GCThread::gcThreadMain() (this=0x555559c2fc50) at heap/GCThread.cpp:99 #4 0x00007fffe6743218 in JSC::GCThread::gcThreadStartFunc(void*) (data=0x555559c2fc50) at heap/GCThread.cpp:135 #5 0x00007fffe6a32984 in WTF::threadEntryPoint(void*) (contextData=0x5555598a9dd0) at wtf/Threading.cpp:69 #6 0x00007fffe6a4c27d in WTF::wtfThreadEntryPoint(void*) (param=0x555559c2afa0) at wtf/ThreadingPthreads.cpp:195 #7 0x00007ffff7bc4464 in start_thread (arg=0x7fffb8a11700) at pthread_create.c:333 #8 0x00007ffff6fe29df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105 Thread 11 (Thread 0x7fffb9212700 (LWP 4690)): #0 0x00007ffff7bca18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fffe6a4ca5c in WTF::ThreadCondition::wait(WTF::Mutex&) (this=0x55555a429b80, mutex=...) at wtf/ThreadingPthreads.cpp:378 #2 0x00007fffe674306f in JSC::GCThread::waitForNextPhase() (this=0x5555598a3570) at heap/GCThread.cpp:81 #3 0x00007fffe6743115 in JSC::GCThread::gcThreadMain() (this=0x5555598a3570) at heap/GCThread.cpp:99 #4 0x00007fffe6743218 in JSC::GCThread::gcThreadStartFunc(void*) (data=0x5555598a3570) at heap/GCThread.cpp:135 #5 0x00007fffe6a32984 in WTF::threadEntryPoint(void*) (contextData=0x5555598a9d20) at wtf/Threading.cpp:69 #6 0x00007fffe6a4c27d in WTF::wtfThreadEntryPoint(void*) (param=0x5555597195f0) at wtf/ThreadingPthreads.cpp:195 #7 0x00007ffff7bc4464 in start_thread (arg=0x7fffb9212700) at pthread_create.c:333 #8 0x00007ffff6fe29df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105 Thread 10 (Thread 0x7fffb9a13700 (LWP 4689)): #0 0x00007ffff7bca538 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x00007fffe6a4cb4e in WTF::ThreadCondition::timedWait(WTF::Mutex&, double) (this=0x55555a421058, mutex=..., absoluteTime=1482788107.360693) at wtf/ThreadingPthreads.cpp:399 #2 0x00007fffe6740a40 in JSC::BlockAllocator::waitForRelativeTimeWhileHoldingLock(double) (this=0x55555a420e48, relative=1) at heap/BlockAllocator.cpp:100 #3 0x00007fffe6740a8a in JSC::BlockAllocator::waitForRelativeTime(double) (this=0x55555a420e48, relative=1) at heap/BlockAllocator.cpp:110 #4 0x00007fffe6740ae9 in JSC::BlockAllocator::blockFreeingThreadMain() (this=0x55555a420e48) at heap/BlockAllocator.cpp:124 #5 0x00007fffe6740ab2 in JSC::BlockAllocator::blockFreeingThreadStartFunc(void*) (blockAllocator=0x55555a420e48) at heap/BlockAllocator.cpp:115 #6 0x00007fffe6a32984 in WTF::threadEntryPoint(void*) (contextData=0x5555598a9d20) at wtf/Threading.cpp:69 #7 0x00007fffe6a4c27d in WTF::wtfThreadEntryPoint(void*) (param=0x5555572a30a0) at wtf/ThreadingPthreads.cpp:195 #8 0x00007ffff7bc4464 in start_thread (arg=0x7fffb9a13700) at pthread_create.c:333 #9 0x00007ffff6fe29df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105 Thread 9 (Thread 0x7fffba263700 (LWP 4688)): #0 0x00007ffff6fd956d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007ffff037b9f6 in g_main_context_iterate (priority=, n_fds=1, fds=0x7fff680013c0, timeout=, context=0x7fff680009b0) at ././glib/gmain.c:4228 #2 0x00007ffff037b9f6 in g_main_context_iterate (context=context@entry=0x7fff680009b0, block=block@entry=1, dispatch=dispatch@entry=1, self=) at ././glib/gmain.c:3924 #3 0x00007ffff037bb0c in g_main_context_iteration (context=0x7fff680009b0, may_block=1) at ././glib/gmain.c:3990 ---Type to continue, or q to quit--- #4 0x00007fffed7da4a1 in QEventDispatcherGlib::processEvents(QFlags) (this=0x7fff680008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #5 0x00007fffed75aaec in QEventLoop::processEvents(QFlags) (this=0x7fffba262e50, flags=...) at kernel/qeventloop.cpp:134 #6 0x00007fffed75ade8 in QEventLoop::exec(QFlags) (this=0x7fffba262e50, flags=...) at kernel/qeventloop.cpp:212 #7 0x00007fffed51d220 in QThread::exec() (this=0x555559837a10) at thread/qthread.cpp:507 #8 0x00007fffed51d3c2 in QThread::run() (this=0x555559837a10) at thread/qthread.cpp:574 #9 0x00007fffed524eac in QThreadPrivate::start(void*) (arg=0x555559837a10) at thread/qthread_unix.cpp:368 #10 0x00007ffff7bc4464 in start_thread (arg=0x7fffba263700) at pthread_create.c:333 #11 0x00007ffff6fe29df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105 Thread 8 (Thread 0x7fffbade4700 (LWP 4683)): #0 0x00007ffff6fdb2b3 in select () at ../sysdeps/unix/syscall-template.S:84 #1 0x0000555555721b59 in time_sleep.lto_priv.2662 (secs=) at ../Modules/timemodule.c:948 #2 0x0000555555721b59 in time_sleep.lto_priv.2662 (self=, args=) at ../Modules/timemodule.c:206 #3 0x000055555564f20a in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbade30f0) at ../Python/ceval.c:4352 #4 0x000055555564f20a in PyEval_EvalFrameEx (f=Frame 0x7fff64000b50, for file /usr/lib/python2.7/threading.py, line 359, in wait (self=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6e10>, timeout=2, waiter=, saved_state=None, endtime=, delay=, gotit=False, remaining=), throwflag=0) at ../Python/ceval.c:2989 #5 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x7ffff6d211a8, defcount=1, closure=0x0) at ../Python/ceval.c:3584 #6 0x0000555555654d59 in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fffbade3300, func=) at ../Python/ceval.c:4447 #7 0x0000555555654d59 in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbade3300) at ../Python/ceval.c:4372 #8 0x0000555555654d59 in PyEval_EvalFrameEx (f=Frame 0x7fffc00e4230, for file /usr/lib/python2.7/threading.py, line 614, in wait (self=<_Event(_Verbose__verbose=False, _Event__flag=False, _Event__cond=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc03b6e10>) at remote 0x7fffc03b6fd0>, timeout=2), throwflag=0) at ../Python/ceval.c:2989 #9 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x7ffff6d21368, defcount=1, closure=0x0) at ../Python/ceval.c:3584 #10 0x0000555555654d59 in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fffbade3510, func=) at ../Python/ceval.c:4447 #11 0x0000555555654d59 in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbade3510) at ../Python/ceval.c:4372 #12 0x0000555555654d59 in PyEval_EvalFrameEx (f=Frame 0x7fffc03b4910, for file /usr/lib/calibre/calibre/db/backup.py, line 47, in wait (self=, _Thread__block=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d810>, _Thread__name='Thread-6', _Thread__daemonic=True, _db=, interval=2, _Thread__started=<_Event(_Verbose__verbose=False, _Event__flag=True, _Event__cond=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d7d0>) at remote 0x...(truncated), throwflag=0) at ../Python/ceval.c:2989 #13 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #14 0x000055555565549b in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fffbade3720, func=) at ../Python/ceval.c:4447 #15 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbade3720) at ../Python/ceval.c:4372 #16 0x000055555565549b in PyEval_EvalFrameEx (f=Frame 0x7fffc03abd00, for file /usr/lib/calibre/calibre/db/backup.py, line 53, in run (self=, _---Type to continue, or q to quit--- Thread__block=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d810>, _Thread__name='Thread-6', _Thread__daemonic=True, _db=, interval=2, _Thread__started=<_Event(_Verbose__verbose=False, _Event__flag=True, _Event__cond=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d7d0>) at remote 0x7...(truncated), throwflag=0) at ../Python/ceval.c:2989 #17 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #18 0x000055555565549b in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fffbade3930, func=) at ../Python/ceval.c:4447 #19 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbade3930) at ../Python/ceval.c:4372 #20 0x000055555565549b in PyEval_EvalFrameEx (f=Frame 0x7fff64000910, for file /usr/lib/python2.7/threading.py, line 801, in __bootstrap_inner (self=, _Thread__block=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d810>, _Thread__name='Thread-6', _Thread__daemonic=True, _db=, interval=2, _Thread__started=<_Event(_Verbose__verbose=False, _Event__flag=True, _Event__cond=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d7d0>) at r...(truncated), throwflag=0) at ../Python/ceval.c:2989 #21 0x0000555555654a5f in PyEval_EvalFrameEx (nk=, na=, n=, pp_stack=0x7fffbade3a80, func=) at ../Python/ceval.c:4437 #22 0x0000555555654a5f in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbade3a80) at ../Python/ceval.c:4372 #23 0x0000555555654a5f in PyEval_EvalFrameEx (f=Frame 0x7fffc03b4750, for file /usr/lib/python2.7/threading.py, line 774, in __bootstrap (self=, _Thread__block=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d810>, _Thread__name='Thread-6', _Thread__daemonic=True, _db=, interval=2, _Thread__started=<_Event(_Verbose__verbose=False, _Event__flag=True, _Event__cond=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d7d0>) at remote ...(truncated), throwflag=0) at ../Python/ceval.c:2989 #24 0x000055555564d345 in PyEval_EvalCodeEx (co=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #25 0x0000555555669fee in function_call.lto_priv.296 (func=, arg=(, _Thread__block=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d810>, _Thread__name='Thread-6', _Thread__daemonic=True, _db=, interval=2, _Thread__started=<_Event(_Verbose__verbose=False, _Event__flag=True, _Event__cond=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d7d0>) at remote 0x7fffc03966d0>, _Thread__stderr=, _Thread__target=None, _Threa...(truncated), kw=0x0) at ../Objects/funcobject.c:523 #26 0x000055555563b8f3 in PyObject_Call (func=, arg=, kw=) at ../Objects/abstract.c:2547 #27 0x000055555568054e in instancemethod_call.lto_priv.215 (func=, arg=(, _Thread__block=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d810>, _Thread__name='Thread-6', _Thread__daemonic=True, _db=, interval=2, _Thread__started=<_Event(_Verbose__verbose=False, _Event__flag=True, _Event__cond=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc039d7d0>) at remote 0x7fffc03966d0>, _Thread__stderr=, _Thread__target=None, _Threa...(truncated), kw=0x0) at ../Objects/classobject.c:2602 #28 0x000055555563b8f3 in PyObject_Call (func=, arg=, kw=) at ../Objects/abstract.c:2547 #29 0x0000555555659300 in PyEval_CallObjectWithKeywords (func=, arg=(), kw=) at ../Python/ceval.c:4221 #30 0x00005555557216f2 in t_bootstrap (boot_raw=0x555559bf8120) at ../Modules/threadmodule.c:620 #31 0x00007ffff7bc4464 in start_thread (arg=0x7fffbade4700) at pthread_create.c:333 #32 0x00007ffff6fe29df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105 ---Type to continue, or q to quit--- Thread 7 (Thread 0x7fffbb7fe700 (LWP 4682)): #0 0x00007ffff6fdb2b3 in select () at ../sysdeps/unix/syscall-template.S:84 #1 0x0000555555721b59 in time_sleep.lto_priv.2662 (secs=) at ../Modules/timemodule.c:948 #2 0x0000555555721b59 in time_sleep.lto_priv.2662 (self=, args=) at ../Modules/timemodule.c:206 #3 0x000055555564f20a in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbb7fd1b0) at ../Python/ceval.c:4352 #4 0x000055555564f20a in PyEval_EvalFrameEx (f=Frame 0x7fffc03a5d70, for file /usr/lib/calibre/calibre/devices/usbms/device.py, line 855, in open (self=, site_customization=None, report_progress=, _card_b_prefix=None, _card_a_prefix=None, plugin_path=None) at remote 0x7fffc5a04750>, connected_device=, library_uuid=None), throwflag=0) at ../Python/ceval.c:2989 #5 0x0000555555654a5f in PyEval_EvalFrameEx (nk=, na=, n=, pp_stack=0x7fffbb7fd300, func=) at ../Python/ceval.c:4437 #6 0x0000555555654a5f in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbb7fd300) at ../Python/ceval.c:4372 #7 0x0000555555654a5f in PyEval_EvalFrameEx (f=Frame 0x7fff6c0029a0, for file /usr/lib/calibre/calibre/gui2/device.py, line 198, in do_connect (self=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714990>, mutex=, not_full=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714e50>, not_empty=<_Condition(_Verbose__verbose=False, _Condition__lock=, globals=, locals=, args=, argcount=, kws=, kwcount=1, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #9 0x000055555565549b in PyEval_EvalFrameEx (nk=1, na=, n=, pp_stack=0x7fffbb7fd510, func=) at ../Python/ceval.c:4447 #10 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbb7fd510) at ../Python/ceval.c:4372 #11 0x000055555565549b in PyEval_EvalFrameEx (f=Frame 0x7fff6c001090, for file /usr/lib/calibre/calibre/gui2/device.py, line 321, in detect_device (self=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714990>, mutex=, not_full=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714e50>, not_empty=<_Condition(_Verbose__verbose=False, _Condition__lock=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #13 0x000055555565549b in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fffbb7fd720, func=) at ../Python/ceval.c:4447 #14 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbb7fd720) at ../Python/ceval.c:4372 #15 0x000055555565549b in PyEval_EvalFrameEx (f=Frame 0x7fff6c000b50, for file /usr/lib/calibre/calibre/gui2/device.py, line 404, in run (self=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714990>, mutex=, not_full=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714e50>, not_empty=<_Condition(_Verbose__verbose=False, _Condition__lock=, globals=, locals=, args=, argcount=, kws=, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3584 #17 0x000055555565549b in PyEval_EvalFrameEx (nk=0, na=, n=, pp_stack=0x7fffbb7fd930, func=) at ../Python/ceval.c:4447 #18 0x000055555565549b in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbb7fd930) at ../Python/ceval.c:4372 #19 0x000055555565549b in PyEval_EvalFrameEx (f=Frame 0x7fff6c000910, for file /usr/lib/python2.7/threading.py, line 801, in __bootstrap_inner (self=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, ---Type to continue, or q to quit--- _Condition__waiters=[], release=) at remote 0x7fffc0714990>, mutex=, not_full=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714e50>, not_empty=<_Condition(_Verbose__verbose=False, _Condition__lock=, na=, n=, pp_stack=0x7fffbb7fda80, func=) at ../Python/ceval.c:4437 #21 0x0000555555654a5f in PyEval_EvalFrameEx (oparg=, pp_stack=0x7fffbb7fda80) at ../Python/ceval.c:4372 #22 0x0000555555654a5f in PyEval_EvalFrameEx (f=Frame 0x7fffc06a3e50, for file /usr/lib/python2.7/threading.py, line 774, in __bootstrap (self=, maxsize=0, all_tasks_done=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714990>, mutex=, not_full=<_Condition(_Verbose__verbose=False, _Condition__lock=, acquire=, _Condition__waiters=[], release=) at remote 0x7fffc0714e50>, not_empty=<_Condition(_Verbose__verbose=False, _Condition__lock=