I'm seeing hangs at the moment in a reproducible way.
One of the hung processes is stty.exe.
I attached with strace and saw the following three messages being rapidly
repeated:
64 115520392 [sig] stty 20375 sigpacket::setup_handler: suspending
thread, tls 0x7FFFFCE00, _main_tls 0x7FFFFCE00
77 115520469 [sig] stty 20375 _cygtls::inside_kernel: pc 0x7FF91290D574,
h 0x7FF912870000, inside_kernel 1
66 115520535 [sig] stty 20375 sigpacket::setup_handler: couldn't
interrupt. trying again.
Is this interesting?
The command was simply `stty size`.
Michael
On Thu, Jan 2, 2025 at 1:38 PM Robert Terzi via Cygwin <cygwin@cygwin.com>
wrote:
> Restarting the pip install of iPython eventually worked.
>
> Pip didn't try to redownload either of the packages it previous hung on,
> so I guess the download was successful.
> I don't know whether pip is running anything via a subprocess.
>
> However, once I fire up the newly installed 3.12 iPython, it comes up, but
> hangs the same way if I just hit enter at the prompt.
>
> --- Process 31388 (pid: 4569), exception c0000005 at 0000000000000000
>
>
> On 1/2/2025 1:28 PM, Michael Cook wrote:
> > All the pip install commands I tried worked.
> > But I did see one of my scripts hang trying to run an external command
> (via the subprocess module).
> > I've seen that only once so far.
> >
> > On Thu, Jan 2, 2025 at 1:23 PM Robert Terzi via Cygwin <
> cygwin@cygwin.com> wrote:
> >
> > Thanks Michael that worked to create the venv.
> >
> > Did you have any success with pip installs?
> >
> > For me, simple modules like requests worked but for larger things
> like ipython, Python 3.12 hung hard downloading requirements.
> >
> > Downloading pygments-2.18.0-py3-none-any.whl (1.2 MB)
> > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0.0/1.2 MB ? eta
> -:--:--(py312)
> >
> >
> > I couldn't kill python3.12 with any signal using Cygwin kill.
> However, I was able to end process with Windows Task Manager.
> >
> > Trying again and doing an strace, it seemed to get stuck in a loop
> on this:
> >
> > --- Process 29448 (pid: 4552), exception c0000005 at 0000000000000000
> >
> > It is using 100% of 1 core while doing that.
> >
> > I could be wrong, but it looks like there might still be a hanging
> problem with 3.12 on Cygwin.
> >
> >
> > On 1/2/2025 12:42 PM, Michael Cook wrote:
> > > As a workaround, you can try passing `--without-pip`.
> > > I had success with this:
> > >
> > > python -m venv --system-site-packages --without-pip _venv
> > >
> > >
> > > Michael
> > >
> > > On Thu, Jan 2, 2025 at 11:38 AM Robert Terzi via Cygwin <
> cygwin@cygwin.com> wrote:
> > >
> > > Testing the 3.12 package, trying to make a virtual env fails.
> I think this is because it is looking for the pip wheel.
> > >
> > > I've installed the available 3.12 packages (pip, wheel,
> setuptools, devel).
> > >
> > > venv fails with/without --system-site-packages. I think venv
> is trying to run '-m ensurepip' which seems to
> > > have a dependency on pip wheel.
> > >
> > > $ python3.12 -m venv /srv/pyvenvs/py312
> > > Error: Command '['/srv/pyvenvs/py312/bin/python3.12', '-m',
> 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.
> > >
> > > $ python3.12 -m venv --system-site-packages /srv/pyvenvs/py312
> > > Error: Command '['/srv/pyvenvs/py312/bin/python3.12', '-m',
> 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.
> > >
> > > Trying -m ensurepip directly yields:
> > > $ python3.12 -m ensurepip
> > > [...snip...]
> > > FileNotFoundError: [Errno 2] No such file or directory:
> '/usr/lib/python3.12/ensurepip/_bundled/pip-24.3.1-py3-none-any.whl'
> > >
> > > This works with the previously working 3.9 installation. (I
> haven't tried the updated 3.9 install yet.)
> > >
> > > For 3.9 it looks like the pip*.whl file is in a different
> location:
> > >
> > > $ find /usr/lib/python* -name 'pip*.whl'
> > >
>
> /usr/lib/python3.9/site-packages/virtualenv/seed/wheels/embed/pip-20.3.4-py2.py3-none-any.whl
> > >
>
> /usr/lib/python3.9/site-packages/virtualenv/seed/wheels/embed/pip-21.3.1-py3-none-any.whl
> > >
>
> /usr/lib/python3.9/site-packages/virtualenv/seed/wheels/embed/pip-23.0.1-py3-none-any.whl
> > >
> > > I haven't tried to install/build any modules/wheels since the
> intent was to test the new packages.
> > > Hopefully I'm not missing something obvious.
> > >
> > > Thanks!
> > >
> > >
> > >
> > >
> > > On 12/30/2024 8:53 AM, Marco Atzeri via Cygwin-announce wrote:
> > > > New test release for
> > > >
> > > > python312 3.12.8-1
> > > >
> > > > new releases for
> > > >
> > > > python312-doc 3.12.8-1
> > > >
> > > > python{39,312}-packaging 24.2-1
> > > > python{39,312}-pip 24.3.1-1
> > > > python{39,312}-setuptools 75.6.0-1
> > > > python{39,312}-wheel 0.45.1-1
> > > >
> > > > CHANGES
> > > > latest upstream 3.12.x release. First packaged for Cygwin
> > > >
> > > > CYGWIN CHANGES
> > > > Only python 3.9 and 3.12 are updated.
> > > > Python 2, 3.6, 3.7, 3.8 are not anymore supported upstream.
> > > >
> > > > https://devguide.python.org/versions/#versions
> > > >
> > > > The main packages include postinstall script that
> > > > use "alternatives" to define for
> > > >
> > > > /usr/bin/python
> > > >
> > > > /usr/bin/python3
> > > > /usr/bin/idle3
> > > > /usr/bin/pydoc3
> > > >
> > > > a default to the highest package available.
> > > >
> > > > $ alternatives --display python
> > > > python - status is auto.
> > > > link currently points to /usr/bin/python3.12
> > > > /usr/bin/python3.9 - priority 39
> > > > /usr/bin/python3.12 - priority 312
> > > > Current `best' version is /usr/bin/python3.12.
> > > >
> > > > Rationale:
> > > > https://www.python.org/dev/peps/pep-0394/
> > > > In other systems as Debian
> > > > /usr/bin/python is discouraged.
> > > >
> > > > DESCRIPTION
> > > > Python is a programming language that lets you work quickly
> > > > and integrate systems more effectively.
> > > > Python is powerful... and fast; plays well with others;
> > > > runs everywhere; is friendly & easy to learn; is Open.
> > > >
> > > > HOMEPAGE
> > > > https://www.python.org/
> > > >
> > > > Regards
> > > > Marco Atzeri
> > > >
> > > >
> > > > If you have questions or comments, please send them to the
> > > > cygwin mailing list at: cygwin (at) cygwin (dot) com .
> > >
> > >
> > >
> > > --
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