python fails asyncio tests (py 3.7 & 3.8)

[Mark Geisert]

Hi Marco,

On Mon, 28 Dec 2020, Marco Atzeri via Cygwin-apps wrote:
> On 17.12.2020 10:20, Mark Geisert wrote:
>> Hi Marco,
>> Below is the patch I developed to work around the problem report in
>> https://cygwin.com/pipermail/cygwin/2020-November/246830.html
>> I called the patch file 3.8.3-peercred-cygwin.patch.
>> 
>> I am unable to test the patch myself because of continuing problems 
>> building a new Python.  I don't know if my issues are due to being on 
>> latest Cygwin code vs 3.1.7, or gcc 10.2 vs 9.3, or what.  Could you tell 
>> me what your build environment is like?  I'll try to duplicate it.
>> 
>> Test the patch by running a Python built with it on the example from the 
>> OP. Without the patch, the run would hang in the middle of the test 
>> script.  With the patch, it should quickly complete with 4 unrelated 
>> errors mentioning MSG_OOB.
>> Thanks & Regards,
>> 
>> ..mark
>> 
>
> Hi Mark,
> is this the expected result ?
>
> test_connection_attributes (__main__.TestAPI_UseUnixSocketsPoll) ... ERROR
> /usr/lib/python3.8/unittest/case.py:704: ResourceWarning: unclosed 
> <socket.socket fd=5, family=AddressFamily.AF_UNIX, 
> type=SocketKind.SOCK_STREAM, proto=0>
>  outcome.errors.clear()
>
> It does not freeze

That's a new error to me; I haven't run that test.  I could have been more 
specific in my test instructions.  There are apparently two test series 
(which is also news to me).  They are /usr/lib/python3.8/test and 
.../unittest.  It seems you were in the latter?  The script to run is in 
.../test.  Here's how:
     cd /usr/lib/python3.8/test
     python3.8 test_asyncore.py -v

Separately, I'm still wrestling with build issues.  Just as a known-good 
alternative, how is your test environment set up?  Is your cygwin1.dll 
from standard 3.1.7, or a snapshot, or do you build from git master?  Are 
you using the latest binutils and gcc-g++ packages or something newer?

Thanks for any info you can provide.  I seem to be having issues with 
linking programs having many object files.  Like any Python 3, or the 
Flint math library for examples.  The link fails with a SIGSEGV or an 
assertion failure in cofflink.c.  Nobody else has reported these.
Thanks & Regards,

..mark