[issue36790] test_asyncio fails with application verifier!

[Alexander Riccio]

Alexander Riccio  added the comment:

It's part of the Windows SDK, and is installed with it. To enable for this 
error, add the Python executable in Application Verifier, and check the Handles 
box.

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[issue36790] test_asyncio fails with application verifier!

[Andrew Svetlov]

Andrew Svetlov  added the comment:

What is "Application Verifier"?
Could you provide an instruction on how to install and run it to reproduce the 
issue?

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[issue36790] test_asyncio fails with application verifier!

[sam jonas]

sam jonas  added the comment:

Thanks for the solution...

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nosy: +samjonas

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[issue36790] test_asyncio fails with application verifier!

[Andrew Svetlov]

Change by Andrew Svetlov :


--
components: +asyncio

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[issue36790] test_asyncio fails with application verifier!

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan :


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nosy: +asvetlov, yselivanov

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[issue36790] test_asyncio fails with application verifier!

[Alexander Riccio]

Alexander Riccio  added the comment:

Hmm, proceeding a bit further pointed to finish_recv in windows_events.py

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Added file: https://bugs.python.org/file48299/python_invalid_handle.PNG

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[issue36790] test_asyncio fails with application verifier!

[Alexander Riccio]

New submission from Alexander Riccio :

I compiled PCBuild Debug x64 from an updated clone of upstream, and when 
running the testsuite under Application Verifier with handle verification, the 
test triggers an invalid handle access by passing an invalid overlapped handle 
to CancelIoEx with this code: Py_CancelIoEx(self->handle, >overlapped) 
(where self->handle appears to be the offending variable).

I have no idea who's calling _overlapped.cancel, and a quick spelunking through 
the codebase only confuses me more.

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components: Tests
files: python_test_invalid_handle_failure.TXT
messages: 341365
nosy: Alexander Riccio
priority: normal
severity: normal
status: open
title: test_asyncio fails with application verifier!
versions: Python 3.8
Added file: 
https://bugs.python.org/file48298/python_test_invalid_handle_failure.TXT

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