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test_multiprocessing segfaults on Windows #47374

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theller opened this issue Jun 16, 2008 · 5 comments
Closed

test_multiprocessing segfaults on Windows #47374

theller opened this issue Jun 16, 2008 · 5 comments
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type-crash A hard crash of the interpreter, possibly with a core dump

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@theller
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theller commented Jun 16, 2008

BPO 3124
Nosy @theller, @amauryfa

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = None
closed_at = <Date 2008-06-16.19:24:01.018>
created_at = <Date 2008-06-16.17:25:41.348>
labels = ['type-crash']
title = 'test_multiprocessing segfaults on Windows'
updated_at = <Date 2008-06-16.19:24:01.016>
user = 'https://github.com/theller'

bugs.python.org fields:

activity = <Date 2008-06-16.19:24:01.016>
actor = 'amaury.forgeotdarc'
assignee = 'none'
closed = True
closed_date = <Date 2008-06-16.19:24:01.018>
closer = 'amaury.forgeotdarc'
components = []
creation = <Date 2008-06-16.17:25:41.348>
creator = 'theller'
dependencies = []
files = []
hgrepos = []
issue_num = 3124
keywords = []
message_count = 5.0
messages = ['68274', '68275', '68277', '68288', '68291']
nosy_count = 3.0
nosy_names = ['theller', 'amaury.forgeotdarc', 'jnoller']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = None
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue3124'
versions = ['Python 2.6']
@theller
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theller commented Jun 16, 2008

When Python shuts down after running test_multiprocessing on Windows, a
segfault occurs (this is with a debug build from trunk):

python26_d.dll!_Py_ForgetReference(_object * op=0x012de740) Line 2023
+ 0xf bytes C
python26_d.dll!_Py_Dealloc(_object * op=0x012de740) Line 2043 + 0x9
bytes C
python26_d.dll!tupledealloc(PyTupleObject * op=0x00d58c78) Line 169 +
0x8a bytes C
python26_d.dll!_Py_Dealloc(_object * op=0x00d58c78) Line 2044 + 0x7
bytes C
python26_d.dll!PyObject_CallFunctionObjArgs(_object *
callable=0x00d64090, ...) Line 2716 + 0x51 bytes C
python26_d.dll!handle_callback(_PyWeakReference * ref=0x012de740,
_object * callback=0x00d64090) Line 864 + 0xf bytes C
python26_d.dll!PyObject_ClearWeakRefs(_object * object=0x012bcc98)
Line 910 + 0xd bytes C
python26_d.dll!func_dealloc(PyFunctionObject * op=0x012bcc98) Line
453 + 0x9 bytes C
python26_d.dll!_Py_Dealloc(_object * op=0x012bcc98) Line 2044 + 0x7
bytes C
python26_d.dll!tupledealloc(PyTupleObject * op=0x012ddeb8) Line 169 +
0x8a bytes C
python26_d.dll!_Py_Dealloc(_object * op=0x012ddeb8) Line 2044 + 0x7
bytes C
python26_d.dll!clear_slots(_typeobject * type=0x00cbbac8, _object *
self=0x012de740) Line 821 + 0x51 bytes C
python26_d.dll!subtype_dealloc(_object * self=0x012de740) Line 950
+ 0xd bytes C
python26_d.dll!_Py_Dealloc(_object * op=0x012de740) Line 2044 + 0x7
bytes C
python26_d.dll!dict_dealloc(_dictobject * mp=0x00d538c0) Line 907 +
0x6c bytes C
python26_d.dll!_Py_Dealloc(_object * op=0x00d538c0) Line 2044 + 0x7
bytes C
python26_d.dll!dict_dealloc(_dictobject * mp=0x00d536c8) Line 907 +
0x6c bytes C
python26_d.dll!_Py_Dealloc(_object * op=0x00d536c8) Line 2044 + 0x7
bytes C
python26_d.dll!instance_dealloc(PyInstanceObject * inst=0x00d60bf8)
Line 668 + 0x6c bytes C
python26_d.dll!_Py_Dealloc(_object * op=0x00d60bf8) Line 2044 + 0x7
bytes C
python26_d.dll!insertdict(_dictobject * mp=0x00d53620, _object *
key=0x00d5c9b8, long hash=-1896994012, _object * value=0x1e2bb004) Line
455 + 0x51 bytes C
python26_d.dll!PyDict_SetItem(_object * op=0x00d53620, _object *
key=0x00d5c9b8, _object * value=0x1e2bb004) Line 697 + 0x15 bytes C
python26_d.dll!_PyModule_Clear(_object * m=0x00d63968) Line 125 +
0x12 bytes C
python26_d.dll!PyImport_Cleanup() Line 479 + 0x9 bytes C
python26_d.dll!Py_Finalize() Line 452 C
python26_d.dll!Py_Exit(int sts=0) Line 1690 C
python26_d.dll!handle_system_exit() Line 1111 + 0x9 bytes C
python26_d.dll!PyErr_PrintEx(int set_sys_last_vars=1) Line 1123 C
python26_d.dll!PyErr_Print() Line 1030 + 0x7 bytes C
python26_d.dll!PyRun_SimpleFileExFlags(_iobuf * fp=0x10311448, const
char * filename=0x009d5d93, int closeit=1, PyCompilerFlags *
flags=0x0022ff30) Line 931 C
python26_d.dll!PyRun_AnyFileExFlags(_iobuf * fp=0x10311448, const char

  • filename=0x009d5d93, int closeit=1, PyCompilerFlags *
    flags=0x0022ff30) Line 731 + 0x15 bytes C
    python26_d.dll!Py_Main(int argc=5, char * * argv=0x009d5d68) Line 600
    + 0x39 bytes C
    python_d.exe!main(int argc=5, char * * argv=0x009d5d68) Line 23 +
    0xe bytes C
    python_d.exe!__tmainCRTStartup() Line 582 + 0x19 bytes C
    python_d.exe!mainCRTStartup() Line 399 C

@theller theller added the type-crash A hard crash of the interpreter, possibly with a core dump label Jun 16, 2008
@amauryfa
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Can you check whether the patch for bpo-3100 corrects the problem?
(see PyObject_ClearWeakRefs in the call stack)

@theller
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theller commented Jun 16, 2008

Yes, the patch weakref_cycle.patch from bpo-3100 fixes the problem.

@theller
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theller commented Jun 16, 2008

Thomas Heller <theller@ctypes.org> added the comment:

Yes, the patch weakref_cycle.patch from bpo-3100 fixes the problem.

BTW: I also get a segfault on Linux, which is fixed by this patch.

@amauryfa
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This is a duplicate of bpo-3100, which has been corrected by r64309.

@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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