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[issue8847] crash appending list and namedtuple

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Jul 31, 2012, 3:39 PM

Post #26 of 35 (114 views)
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[issue8847] crash appending list and namedtuple [In reply to]

Martin v. Löwis added the comment:

> Also, the only person to run the tests with the PGO build will probably
> be Martin just before the releases. :)

We could set up a buildbot slave which does PGO builds, provided somebody
volunteered an installation (including VS Pro), and somebody contributed
a build script that deviates from the regular build (perhaps including some
training on the PGI). This is a separate issue, of course.

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Jul 31, 2012, 3:43 PM

Post #27 of 35 (108 views)
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[issue8847] crash appending list and namedtuple [In reply to]

Martin v. Löwis added the comment:

> If anyone can confirm that this is the case or has a pointer to
> the relevant vcproj docs, I'd be thrilled.

http://msdn.microsoft.com/de-de/library/microsoft.visualstudio.vcprojectengine.vclinkertool.enablecomdatfolding(v=vs.90).aspx

http://msdn.microsoft.com/de-de/library/microsoft.visualstudio.vcprojectengine.optfoldingtype(v=vs.90).aspx

While the actual values for the XML schema aren't documented, I expect that
they have the numeric values that they have in C++ (i.e. optFoldingDefault=0,
optNoFolding=1, optFolding=2)

To confirm, just look up the setting in the UI.

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report at bugs

Jul 31, 2012, 5:18 PM

Post #28 of 35 (113 views)
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[issue8847] crash appending list and namedtuple [In reply to]

Changes by Jesús Cea Avión <jcea [at] jcea>:

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nosy: +jcea

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report at bugs

Aug 1, 2012, 1:06 AM

Post #29 of 35 (114 views)
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[issue8847] crash appending list and namedtuple [In reply to]

Roundup Robot added the comment:

New changeset 5a8c5631463f by Martin v. Löwis in branch '2.7':
Issue #8847: Disable COMDAT folding in Windows PGO builds.
http://hg.python.org/cpython/rev/5a8c5631463f

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nosy: +python-dev

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report at bugs

Aug 1, 2012, 2:11 AM

Post #30 of 35 (108 views)
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[issue8847] crash appending list and namedtuple [In reply to]

Roundup Robot added the comment:

New changeset 2638ce032151 by Martin v. Löwis in branch '3.2':
Issue #8847: Disable COMDAT folding in Windows PGO builds.
http://hg.python.org/cpython/rev/2638ce032151

New changeset 029cde4e58c5 by Martin v. Löwis in branch 'default':
Issue #8847: Disable COMDAT folding in Windows PGO builds.
http://hg.python.org/cpython/rev/029cde4e58c5

New changeset d3afe5d8a4da by Martin v. Löwis in branch 'default':
Issue #8847: Merge with 3.2
http://hg.python.org/cpython/rev/d3afe5d8a4da

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Aug 1, 2012, 2:13 AM

Post #31 of 35 (113 views)
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[issue8847] crash appending list and namedtuple [In reply to]

Martin v. Löwis added the comment:

Thanks for the research and the fix!

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resolution: -> fixed
status: open -> closed

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Aug 1, 2012, 2:29 AM

Post #32 of 35 (108 views)
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[issue8847] crash appending list and namedtuple [In reply to]

STINNER Victor added the comment:

You didn't add any test for non regression??

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Aug 1, 2012, 3:17 AM

Post #33 of 35 (108 views)
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[issue8847] crash appending list and namedtuple [In reply to]

Martin v. Löwis added the comment:

> You didn't add any test for non regression??

Please rephrase your question: what tests did I not add?
I did add the tests that Stefan proposed.

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Aug 1, 2012, 5:34 AM

Post #34 of 35 (113 views)
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[issue8847] crash appending list and namedtuple [In reply to]

STINNER Victor added the comment:

> Please rephrase your question: what tests did I not add?
> I did add the tests that Stefan proposed.

Ah yes, you added new tests to Python 3.2 and 3.3, but no to Python
2.7. Why not adding these new tests to Python 2.7?

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Aug 1, 2012, 6:32 AM

Post #35 of 35 (108 views)
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[issue8847] crash appending list and namedtuple [In reply to]

Martin v. Löwis added the comment:

> Ah yes, you added new tests to Python 3.2 and 3.3, but no to Python
> 2.7. Why not adding these new tests to Python 2.7?

The tests don't crash Python 2.7. So they are not useful as a test whether
the bug has been worked-around. I actually don't know how to test this
compiler
bug in Python 2.7 (except for writing specific C code that tries to trigger
the bug).

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