(gdb) run /usr/bin/calibre
Starting program: /usr/bin/python /usr/bin/calibre
process 21363 is executing new program: /usr/bin/python2.7
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffd4856700 (LWP 21370)]

Program received signal SIGSEGV, Segmentation fault.
0x00007fffed13da2a in get_random_fd () at gen_uuid.c:156
156     gen_uuid.c: No such file or directory.
        in gen_uuid.c
(gdb) bt
#0  0x00007fffed13da2a in get_random_fd () at gen_uuid.c:156
#1  0x00007fffed13db5a in get_random_bytes (buf=0x7ffff7fc6010, nbytes=0) at gen_uuid.c:175
#2  0x00007fffed13dd2f in uuid__generate_random (out=0x2625640 "", num=<value optimized out>) at gen_uuid.c:641
#3  0x00007fffed13ddb6 in uuid_generate_random (out=0x7ffff7fc6010 "\005") at gen_uuid.c:657
#4  0x00007fffe1f62108 in ffi_call_unix64 () at src/x86/unix64.S:75
#5  0x00007fffe1f61ebc in ffi_call (cif=<value optimized out>, fn=<value optimized out>, rvalue=<value optimized out>, avalue=0x7fffffffab40) at src/x86/ffi64.c:484
#6  0x00007fffe21763d4 in _call_function_pointer (pProc=<value optimized out>, argtuple=<value optimized out>, flags=<value optimized out>, argtypes=<value optimized out>, restype=<value optimized out>, checker=<value optimized out>)
    at /var/tmp/portage/dev-lang/python-2.7.1-r1/work/Python-2.7.1/Modules/_ctypes/callproc.c:827
#7  _ctypes_callproc (pProc=<value optimized out>, argtuple=<value optimized out>, flags=<value optimized out>, argtypes=<value optimized out>, restype=<value optimized out>, checker=<value optimized out>)
    at /var/tmp/portage/dev-lang/python-2.7.1-r1/work/Python-2.7.1/Modules/_ctypes/callproc.c:1174
#8  0x00007fffe2170701 in PyCFuncPtr_call (self=0xdbfef0, inargs=0x2619310, kwds=<value optimized out>) at /var/tmp/portage/dev-lang/python-2.7.1-r1/work/Python-2.7.1/Modules/_ctypes/_ctypes.c:3880
#9  0x00007ffff7a6c5e4 in PyObject_Call (func=0xdbfef0, arg=0x0, kw=0x4) at Objects/abstract.c:2529
#10 0x00007ffff7b0653d in do_call (f=0x26622b0, throwflag=<value optimized out>) at Python/ceval.c:4230
#11 call_function (f=0x26622b0, throwflag=<value optimized out>) at Python/ceval.c:4035
#12 PyEval_EvalFrameEx (f=0x26622b0, throwflag=<value optimized out>) at Python/ceval.c:2665
#13 0x00007ffff7b075d3 in fast_function (f=0x2663990, throwflag=<value optimized out>) at Python/ceval.c:4098
#14 call_function (f=0x2663990, throwflag=<value optimized out>) at Python/ceval.c:4033
#15 PyEval_EvalFrameEx (f=0x2663990, throwflag=<value optimized out>) at Python/ceval.c:2665
#16 0x00007ffff7b08a38 in PyEval_EvalCodeEx (co=0xe41730, globals=<value optimized out>, locals=<value optimized out>, args=0xe3de28, argcount=-142602020, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/ceval.c:3252
#17 0x00007ffff7a947ba in function_call (func=0x2375578, arg=0xe3de10, kw=0x0) at Objects/funcobject.c:526
#18 0x00007ffff7a6c5e4 in PyObject_Call (func=0x2375578, arg=0x0, kw=0x4) at Objects/abstract.c:2529
#19 0x00007ffff7a6c6c1 in call_function_tail (callable=0x2375578, args=0xe3de10) at Objects/abstract.c:2561
#20 0x00007ffff7a6d242 in PyObject_CallFunction (callable=0x2375578, format=<value optimized out>) at Objects/abstract.c:2585
#21 0x00007ffff7aab5fb in _PyObject_GenericGetAttrWithDict (obj=0x2619ad0, name=0xe445a0, dict=0x0) at Objects/object.c:1432
#22 0x00007ffff7b03896 in PyEval_EvalFrameEx (f=0x285ce80, throwflag=<value optimized out>) at Python/ceval.c:2255
#23 0x00007ffff7b08a38 in PyEval_EvalCodeEx (co=0xe41a30, globals=<value optimized out>, locals=<value optimized out>, args=0x5, argcount=-142602020, kws=<value optimized out>, kwcount=0, defs=0x135f928, defcount=3, closure=0x0)
    at Python/ceval.c:3252
#24 0x00007ffff7a947ba in function_call (func=0x23756e0, arg=0xde0878, kw=0x0) at Objects/funcobject.c:526
#25 0x00007ffff7a6c5e4 in PyObject_Call (func=0x23756e0, arg=0x0, kw=0x4) at Objects/abstract.c:2529
#26 0x00007ffff7a7eccd in instancemethod_call (func=0x23756e0, arg=0xde0878, kw=0x0) at Objects/classobject.c:2578
#27 0x00007ffff7a6c5e4 in PyObject_Call (func=0x2250640, arg=0x0, kw=0x4) at Objects/abstract.c:2529
#28 0x00007ffff7ac2dfe in slot_tp_init (self=<value optimized out>, args=0xe3dc90, kwds=0x0) at Objects/typeobject.c:5651
#29 0x00007ffff7ac1b6a in type_call (type=<value optimized out>, args=0xe3dc90, kwds=0x0) at Objects/typeobject.c:728
#30 0x00007ffff7a6c5e4 in PyObject_Call (func=0x1ea7070, arg=0x0, kw=0x4) at Objects/abstract.c:2529
#31 0x00007ffff7b0653d in do_call (f=0x284db40, throwflag=<value optimized out>) at Python/ceval.c:4230
#32 call_function (f=0x284db40, throwflag=<value optimized out>) at Python/ceval.c:4035
#33 PyEval_EvalFrameEx (f=0x284db40, throwflag=<value optimized out>) at Python/ceval.c:2665
#34 0x00007ffff7b075d3 in fast_function (f=0x2745f00, throwflag=<value optimized out>) at Python/ceval.c:4098
#35 call_function (f=0x2745f00, throwflag=<value optimized out>) at Python/ceval.c:4033
#36 PyEval_EvalFrameEx (f=0x2745f00, throwflag=<value optimized out>) at Python/ceval.c:2665
#37 0x00007ffff7b08a38 in PyEval_EvalCodeEx (co=0xdd18b0, globals=<value optimized out>, locals=<value optimized out>, args=0x76dca8, argcount=-142602020, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/ceval.c:3252
#38 0x00007ffff7a947ba in function_call (func=0x237c2a8, arg=0x76dc90, kw=0x0) at Objects/funcobject.c:526
#39 0x00007ffff7a6c5e4 in PyObject_Call (func=0x237c2a8, arg=0x0, kw=0x4) at Objects/abstract.c:2529
#40 0x00007ffff7a7eccd in instancemethod_call (func=0x237c2a8, arg=0x76dc90, kw=0x0) at Objects/classobject.c:2578
#41 0x00007ffff7a6c5e4 in PyObject_Call (func=0x229afa0, arg=0x0, kw=0x4) at Objects/abstract.c:2529
#42 0x00007ffff7b00b22 in PyEval_CallObjectWithKeywords (func=0x229afa0, arg=0x7ffff7f86050, kw=0x4) at Python/ceval.c:3881
#43 0x00007ffff08d22b8 in sip_api_invoke_slot (slot=<value optimized out>, sigargs=0x7ffff7f86050) at qtlib.c:203
#44 0x00007ffff181b3c6 in PyQtProxy::invokeSlot (slot=..., qargs=0x7fffffffc1d0) at qpycore_pyqtproxy.cpp:474
#45 0x00007ffff181b4c8 in PyQtProxy::unislot (this=0x27518f0, qargs=0x7fffffffc1d0) at qpycore_pyqtproxy.cpp:416
#46 0x00007ffff181b57a in PyQtProxy::qt_metacall (this=0x27518f0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffffffc1d0) at qpycore_pyqtproxy.cpp:380
#47 0x00007ffff13791a6 in QMetaObject::activate (sender=0x274fef0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7ffff7801064) at kernel/qobject.cpp:3287
#48 0x00007ffff138059f in QSingleShotTimer::timerEvent (this=0x274fef0) at kernel/qtimer.cpp:308
#49 0x00007ffff13759f6 in QObject::event (this=0x274fef0, e=0x0) at kernel/qobject.cpp:1204
#50 0x00007fffef46556c in QApplicationPrivate::notify_helper (this=0x2664590, receiver=0x274fef0, e=0x7fffffffc920) at kernel/qapplication.cpp:4302
---Type <return> to continue, or q <return> to quit---
#51 0x00007fffef46ba4b in QApplication::notify (this=0x946600, receiver=0x274fef0, e=0x7fffffffc920) at kernel/qapplication.cpp:4185
#52 0x00007ffff04681de in sipQApplication::notify (this=0x946600, a0=0x274fef0, a1=0x7fffffffc920) at sipQtGuiQApplication.cpp:297
#53 0x00007ffff1365eab in QCoreApplication::notifyInternal (this=0x946600, receiver=0x274fef0, event=0x7fffffffc920) at kernel/qcoreapplication.cpp:726
#54 0x00007ffff1392a1a in sendEvent (this=0x2108e00) at kernel/qcoreapplication.h:215
#55 QTimerInfoList::activateTimers (this=0x2108e00) at kernel/qeventdispatcher_unix.cpp:603
#56 0x00007ffff138f794 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#57 0x00007ffff0b1dff9 in g_main_dispatch (context=0x1416aa0) at gmain.c:2440
#58 g_main_context_dispatch (context=0x1416aa0) at gmain.c:3013
#59 0x00007ffff0b22538 in g_main_context_iterate (context=0x1416aa0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:3091
#60 0x00007ffff0b226de in g_main_context_iteration (context=0x1416aa0, may_block=1) at gmain.c:3154
#61 0x00007ffff138f45e in QEventDispatcherGlib::processEvents (this=0x7a6100, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#62 0x00007fffef515586 in QGuiEventDispatcherGlib::processEvents (this=0x7ffff7fc6010, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#63 0x00007ffff13647d2 in QEventLoop::processEvents (this=<value optimized out>, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece or DW_OP_bit_piece.
) at kernel/qeventloop.cpp:149
#64 0x00007ffff1364b9d in QEventLoop::exec (this=0x7fffffffcbd0, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece or DW_OP_bit_piece.
) at kernel/qeventloop.cpp:201
#65 0x00007ffff13697db in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1003
#66 0x00007ffff0468ef0 in meth_QApplication_exec_ (sipArgs=<value optimized out>) at sipQtGuiQApplication.cpp:2237
#67 0x00007ffff7b06e41 in call_function (f=0x274ed30, throwflag=<value optimized out>) at Python/ceval.c:4012
#68 PyEval_EvalFrameEx (f=0x274ed30, throwflag=<value optimized out>) at Python/ceval.c:2665
#69 0x00007ffff7b08a38 in PyEval_EvalCodeEx (co=0xdd19b0, globals=<value optimized out>, locals=<value optimized out>, args=0x6, argcount=-142602020, kws=<value optimized out>, kwcount=1, defs=0xe3dbe8, defcount=1, closure=0x0)
    at Python/ceval.c:3252
#70 0x00007ffff7b06f8a in fast_function (f=0xe36330, throwflag=<value optimized out>) at Python/ceval.c:4108
#71 call_function (f=0xe36330, throwflag=<value optimized out>) at Python/ceval.c:4033
#72 PyEval_EvalFrameEx (f=0xe36330, throwflag=<value optimized out>) at Python/ceval.c:2665
#73 0x00007ffff7b08a38 in PyEval_EvalCodeEx (co=0xdd1bb0, globals=<value optimized out>, locals=<value optimized out>, args=0x1, argcount=-142602020, kws=<value optimized out>, kwcount=0, defs=0xe3dc28, defcount=1, closure=0x0)
    at Python/ceval.c:3252
#74 0x00007ffff7b06f8a in fast_function (f=0x7b2470, throwflag=<value optimized out>) at Python/ceval.c:4108
#75 call_function (f=0x7b2470, throwflag=<value optimized out>) at Python/ceval.c:4033
#76 PyEval_EvalFrameEx (f=0x7b2470, throwflag=<value optimized out>) at Python/ceval.c:2665
#77 0x00007ffff7b08a38 in PyEval_EvalCodeEx (co=0x70bdb0, globals=<value optimized out>, locals=<value optimized out>, args=0x0, argcount=-142602020, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/ceval.c:3252
#78 0x00007ffff7b08b52 in PyEval_EvalCode (co=0x7ffff7fc6010, globals=0x0, locals=0x4) at Python/ceval.c:666
#79 0x00007ffff7b22911 in run_mod (mod=<value optimized out>, filename=<value optimized out>, globals=0x680f70, locals=0x680f70, flags=<value optimized out>, arena=<value optimized out>) at Python/pythonrun.c:1346
#80 0x00007ffff7b229dc in PyRun_FileExFlags (fp=0x7ac440, filename=0x7fffffffd957 "/usr/bin/calibre", start=<value optimized out>, globals=<value optimized out>, locals=0x680f70, closeit=1, flags=0x7fffffffd480)
    at Python/pythonrun.c:1332
#81 0x00007ffff7b23ea7 in PyRun_SimpleFileExFlags (fp=0x7ac440, filename=0x7fffffffd957 "/usr/bin/calibre", closeit=1, flags=0x7fffffffd480) at Python/pythonrun.c:936
#82 0x00007ffff7b351ec in Py_Main (argc=6566000, argv=<value optimized out>) at Modules/main.c:606
#83 0x00007ffff74cabec in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, 
    stack_end=0x7fffffffd598) at libc-start.c:226
#84 0x00000000004008c9 in _start ()
(gdb)