YCM is Python 3.11 incompatible (due to packaged version of bottle)

[brtmr]

Issue Prelude

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Issue Details

Provide a clear description of the problem, including the following key
questions:

• What did you do?

Updated to Python 3.11.

Include steps to reproduce here.

1. Started vim, YcmServer reports that it crashed
2. Log files are empty
3. Manually started ycmd to figure out the issue, see the following:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/home/basti/.local/share/nvim/plugged/YouCompleteMe/python/ycm/../../third_party/ycmd/ycmd/__main__.py", line 54, in <module>
    from ycmd.hmac_plugin import HmacPlugin
  File "/home/basti/.local/share/nvim/plugged/YouCompleteMe/third_party/ycmd/ycmd/hmac_plugin.py", line 19, in <module>
    from bottle import request, abort, response
  File "/home/basti/.local/share/nvim/plugged/YouCompleteMe/third_party/ycmd/third_party/bottle/bottle.py", line 44, in <module>
    from inspect import getargspec
ImportError: cannot import name 'getargspec' from 'inspect' (/usr/lib/python3.11/inspect.py)

Did some digging, the inspect.getargspec() function was deprecated in favor of inspect.getfullargspec()

Include description of a minimal test case, including any actual code required
to reproduce the issue.

Just run python3.11 /path/to/ymcd

• What did you expect to happen?

ymcd starts with Python 3.11

Include description of the expected behaviour.

cmd crashes because it is packaged with a version of bottle that is incompatible with Python 3.11.

Include description of the observed behaviour, including actual output,
screenshots, etc.

Diagnostic data

Output of vim --version

Output of YcmDebugInfo

Output of YcmDiags

---

Output of git rev-parse HEAD in YouCompleteMe installation directory

49ced5a30ad7778178fd44703665a8ef3329e592

Contents of YCM, ycmd and completion engine logfiles

All empty.

OS version, distribution, etc.

Arch Linux: Linux amy 6.3.7-arch1-1 #1 SMP PREEMPT_DYNAMIC Sat, 10 Jun 2023 00:35:35 +0000 x86_64 GNU/Linux

Output of build/install commands

Unnecessary, this is a plain python issue.

[brtmr]

Here is the corresponding bottle.py commit

[puremourning]

YCM works fine with python 3.11. You probably didn't update your submodules.

try git subdue update --init --recursive in the YCM directory.

[puremourning]

Duplicate #4056