On 2017-10-23 14:23, Karsten Hilbert wrote:
> On Sat, Oct 21, 2017 at 09:31:54AM +0200, dieter wrote:
>
>> It points to a memory corruption.
>
> While running valgrind and friends is beyond my capabilitis I
> have run the problem through gdb to at least obtain a stack
> trace to see what gives:
I wouldn't read too much into that. You know that somehow some memory
got corrupted. You know at which point Python trips over the error - but
that doesn't really tell you anything about how the memory initially got
corrupted.
>
> ...
> ==> verifying target database schema ...
> ==> checking migrated data for plausibility ...
> Done bootstrapping GNUmed database: We very likely succeeded.
> log:
> /home/ncq/Projekte/gm-git/gnumed/gnumed/server/bootstrap/bootstrap-latest.log
> Debug memory block at address p=0x6aab7c: API ' '
> 0 bytes originally requested
> The 3 pad bytes at p-3 are not all FORBIDDENBYTE (0xfb):
> at p-3: 0x33 *** OUCH
> at p-2: 0x47 *** OUCH
> at p-1: 0x00 *** OUCH
> Because memory is corrupted at the start, the count of bytes
> requested
> may be bogus, and checking the trailing pad bytes may segfault.
> The 4 pad bytes at tail=0x6aab7c are not all FORBIDDENBYTE (0xfb):
> at tail+0: 0x00 *** OUCH
> at tail+1: 0x00 *** OUCH
> at tail+2: 0x00 *** OUCH
> at tail+3: 0x00 *** OUCH
> The block was made by call #0 to debug malloc/realloc.
> Fatal Python error: bad ID: Allocated using API ' ', verified using API
> 'o'
>
> Program received signal SIGABRT, Aborted.
> 0xb7fd9ce9 in __kernel_vsyscall ()
> (gdb) bt
> #0 0xb7fd9ce9 in __kernel_vsyscall ()
> #1 0xb7d6edd0 in __libc_signal_restore_set (set=0xbfffed40) at
> ../sysdeps/unix/sysv/linux/nptl-signals.h:79
> #2 __GI_raise (sig=6) at ../sysdeps/unix/sysv/linux/raise.c:48
> #3 0xb7d70297 in __GI_abort () at abort.c:89
> #4 0x0055fb74 in Py_FatalError (msg=0xbfffefec "bad ID: Allocated
> using API '\037', verified using API 'o'") at ../Python/pythonrun.c:1700
> #5 0x00499adb in _PyObject_DebugCheckAddressApi (api=111 'o',
> p=0x6aab7c <_Py_ZeroStruct>) at ../Objects/obmalloc.c:1640
> #6 0x004997a5 in _PyObject_DebugFreeApi (api=111 'o', p=0x6aab7c
> <_Py_ZeroStruct>) at ../Objects/obmalloc.c:1527
> #7 0x0049964f in _PyObject_DebugFree (p=0x6aab7c <_Py_ZeroStruct>) at
> ../Objects/obmalloc.c:1471
> #8 0x00471043 in int_dealloc (v=0x6aab7c <_Py_ZeroStruct>) at
> ../Objects/intobject.c:139
> #9 0x00497bee in _Py_Dealloc (op=False) at ../Objects/object.c:2262
> #10 0x00489bad in dict_dealloc (mp=0xb7888f34) at
> ../Objects/dictobject.c:1085
> Python Exception <class 'UnicodeDecodeError'> 'utf-8' codec can't
> decode bytes in position 1-2: unexpected end of data:
> #11 0x00497bee in _Py_Dealloc (op=) at ../Objects/object.c:2262
> Python Exception <class 'UnicodeDecodeError'> 'utf-8' codec can't
> decode bytes in position 1-2: unexpected end of data:
> #12 0x004b9ab7 in subtype_dealloc (self=) at
> ../Objects/typeobject.c:1035
> Python Exception <class 'UnicodeDecodeError'> 'utf-8' codec can't
> decode bytes in position 1-2: unexpected end of data:
> #13 0x00497bee in _Py_Dealloc (op=) at ../Objects/object.c:2262
> #14 0x0044dc7a in instancemethod_dealloc (im=0xb78984b4) at
> ../Objects/classobject.c:2388
> #15 0x00497bee in _Py_Dealloc (op=<instancemethod at remote
> 0xb78984b4>) at ../Objects/object.c:2262
> #16 0x004885d7 in insertdict_by_entry (mp=0xb78880d4, key='_shutdown',
> hash=598970216, ep=0x88d6d4, value=None) at ../Objects/dictobject.c:519
> #17 0x00488857 in insertdict (mp=0xb78880d4, key='_shutdown',
> hash=598970216, value=None) at ../Objects/dictobject.c:556
> #18 0x0048910f in dict_set_item_by_hash_or_entry (
> op={'current_thread': <function at remote 0xb78a28f4>,
> '_BoundedSemaphore': None, 'currentThread': <function at remote 0xb78a28f4>,
> '_Timer': None, '_format_exc': None, 'Semaphore': <function at remote
> 0xb789b6c4>, '_deque': None, 'activeCount': <function at remote 0xb78a2a34>,
> '_profile_hook': None, '_sleep': None, '_trace_hook': None, 'ThreadError':
> <type at remote 0xb784c034>, '_enumerate': None, '_start_new_thread': None,
> 'BoundedSemaphore': <function at remote 0xb789ba34>, '_shutdown': None,
> '__all__': ['activeCount', 'active_count', 'Condition', 'currentThread',
> 'current_thread', 'enumerate', 'Event', 'Lock', 'RLock', 'Semaphore',
> 'BoundedSemaphore', 'Thread', 'Timer', 'setprofile', 'settrace', 'local',
> 'stack_size'], '_Event': <type at remote 0xb789e034>, 'active_count':
> <function at remote 0xb78a2a34>, '__package__': None, '_Condition': <type at
> remote 0xb784c9e4>, '_RLock': <type at remote 0xb784c7f4>, '_test': <function
> at remote 0xb78a2b74>, 'local': <type at remote
0
> x6fd420>, '__doc__': "Thread modul...(truncated), key='_shutdown',
> hash=598970216, ep=0x0, value=None) at ../Objects/dictobject.c:795
> #19 0x00489285 in PyDict_SetItem (
> op={'current_thread': <function at remote 0xb78a28f4>,
> '_BoundedSemaphore': None, 'currentThread': <function at remote 0xb78a28f4>,
> '_Timer': None, '_format_exc': None, 'Semaphore': <function at remote
> 0xb789b6c4>, '_deque': None, 'activeCount': <function at remote 0xb78a2a34>,
> '_profile_hook': None, '_sleep': None, '_trace_hook': None, 'ThreadError':
> <type at remote 0xb784c034>, '_enumerate': None, '_start_new_thread': None,
> 'BoundedSemaphore': <function at remote 0xb789ba34>, '_shutdown': None,
> '__all__': ['activeCount', 'active_count', 'Condition', 'currentThread',
> 'current_thread', 'enumerate', 'Event', 'Lock', 'RLock', 'Semaphore',
> 'BoundedSemaphore', 'Thread', 'Timer', 'setprofile', 'settrace', 'local',
> 'stack_size'], '_Event': <type at remote 0xb789e034>, 'active_count':
> <function at remote 0xb78a2a34>, '__package__': None, '_Condition': <type at
> remote 0xb784c9e4>, '_RLock': <type at remote 0xb784c7f4>, '_test': <function
> at remote 0xb78a2b74>, 'local': <type at remote
0
> x6fd420>, '__doc__': "Thread modul...(truncated), key='_shutdown',
> value=None) at ../Objects/dictobject.c:848
> #20 0x00492758 in _PyModule_Clear (m=<module at remote 0xb7892364>) at
> ../Objects/moduleobject.c:125
> #21 0x0054a33b in PyImport_Cleanup () at ../Python/import.c:530
> #22 0x0055c53c in Py_Finalize () at ../Python/pythonrun.c:458
> #23 0x0055fe9c in Py_Exit (sts=0) at ../Python/pythonrun.c:1783
> #24 0x0055e0fc in handle_system_exit () at ../Python/pythonrun.c:1151
> #25 0x0055e152 in PyErr_PrintEx (set_sys_last_vars=1) at
> ../Python/pythonrun.c:1161
> #26 0x0055dd5b in PyErr_Print () at ../Python/pythonrun.c:1064
> #27 0x0055d61f in PyRun_SimpleFileExFlags (fp=0x7ee010,
> filename=0xbffff7e6 "./bootstrap_gm_db_system.py", closeit=1,
> flags=0xbffff4f4) at ../Python/pythonrun.c:952
> #28 0x0055cc4e in PyRun_AnyFileExFlags (fp=0x7ee010,
> filename=0xbffff7e6 "./bootstrap_gm_db_system.py", closeit=1,
> flags=0xbffff4f4) at ../Python/pythonrun.c:752
> #29 0x00577cb0 in Py_Main (argc=5, argv=0xbffff684) at
> ../Modules/main.c:645
> #30 0x004259c8 in main (argc=5, argv=0xbffff684) at
> ../Modules/python.c:20
> (gdb) quit
> A debugging session is active.
>
> Inferior 1 [process 32024] will be killed.
>
> Quit anyway? (y or n) y
> Dropping obsoleted staging database gnumed_v2 ...
> (you may need to provide the password for root)
> Dropping obsoleted staging database gnumed_v3 ...
> ...
>
> Vague hints from the above might suggest that I go look for
> whether I do have a second thread and where improperly formed
> unicode data might come from.
>
> Karsten
>
--
https://mail.python.org/mailman/listinfo/python-list
