[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Jeroen Demeyer]

Jeroen Demeyer  added the comment:

See also https://bugs.python.org/issue35983 for another trashcan-related issue.

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[STINNER Victor]

STINNER Victor  added the comment:

This issue is closed. Can you please open a new issue? Try to describe the bug 
that you have and what you attemped to fix it.

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Trevor Joynson]

Trevor Joynson  added the comment:

I can also confirm that the included patch does "workaround" the issue.

A big pain point here for me is in determining what exit handler is causing 
this.

GDB has been it's usual great help in determining information about the exact 
segfault, but the problem code itself is rather elusive since it's ran so much 
earlier and just causes this issue downstream later in execution. Unfortunately 
the extensions I'm dealing with also happen to take a lifetime to compile, 
exacerbated by the fact that they are dependent upon one another.

Can we please apply this to 3.x's tree?

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Trevor Joynson]

Trevor Joynson  added the comment:

I can verify this bug does still in fact exist in all 3.x versions I've tested 
(3.4-3.7).

It's been the cause of many long-standing segfaults we've been having at exit 
in applications that use OpenRAVE and/or boost::python::numeric.

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versions: +Python 3.6 -Python 3.4

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[STINNER Victor]

Changes by STINNER Victor :


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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Antoine Pitrou]

Antoine Pitrou added the comment:

 I'm seeing this bug in Python 3.4.2 as well, and the patch here 
 (tstate_trashcan.patch) appears to fix it.

What is the context? Some specific C code?

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Larry Hastings]

Larry Hastings added the comment:

Can anyone else confirm this bug in 3.4?

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Stian Lode]

Stian Lode added the comment:

I'm seeing this bug in Python 3.4.2 as well, and the patch here 
(tstate_trashcan.patch) appears to fix it. I'm using boost 1.57.0, and Python 
was compiled on a vanilla rhel6 system.

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Added file: http://bugs.python.org/file40166/bt.txt

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Daniel]

Daniel added the comment:

Guillaume already mentioned this, its still causing a Fatal Error. To fix this 
PyThreadState_GET() in Py_TRASHCAN_SAFE_BEGIN must be replaced with 
_PyThreadState_Current

#define Py_TRASHCAN_SAFE_BEGIN(op) \
do { \
PyThreadState *_tstate = _PyThreadState_Current; \

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Guillaume Matte]

Guillaume Matte added the comment:

It does still cause a Fatal Error in debug build as PyThreadState_GET() error 
out if _PyThreadState_Current is NULL

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Antoine Pitrou]

Changes by Antoine Pitrou pit...@free.fr:


--
title: Trash can mechanism segfault during interpreter finalization in Python 
2.7.4 - Trashcan mechanism segfault during interpreter finalization in Python 
2.7.4

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Antoine Pitrou]

Changes by Antoine Pitrou pit...@free.fr:


--
stage:  - commit review
type:  - crash

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Roundup Robot]

Roundup Robot added the comment:

New changeset e814fbd470bf by Antoine Pitrou in branch '2.7':
Issue #17703: Fix a regression where an illegal use of Py_DECREF() after 
interpreter finalization can cause a crash.
http://hg.python.org/cpython/rev/e814fbd470bf

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Antoine Pitrou]

Antoine Pitrou added the comment:

Committed!

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resolution:  - fixed
stage: commit review - committed/rejected
status: open - closed

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[issue17703] Trashcan mechanism segfault during interpreter finalization in Python 2.7.4

[Marc-Andre Lemburg]

Marc-Andre Lemburg added the comment:

On 15.04.2013 21:21, Antoine Pitrou wrote:
 
 Committed!

Cool, thanks for the quick turnaround.

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