right list for SIGABRT python binary question ?

[Karsten Hilbert]

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:

	...
	==> 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 0x6fd420>, '__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 0x6fd420>, '__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
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