gh-94808: Coverage: Test that maximum indentation level is handled

[mdboom]

• Issue: Metabug: Improving C-level coverage #94808

[iritkatriel]

What is the source file/function that this test is covering?

[mdboom]

In tokenizer.c, in tok_get

[serhiy-storchaka]

Would not compile() be enough?

[mdboom]

Good idea. Updated.

[nanjekyejoannah]

Thanks @mdboom , seems you handled the requested review.

[miss-islington]

Thanks @mdboom for the PR, and @nanjekyejoannah for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

[bedevere-bot]

GH-97979 is a backport of this pull request to the 3.11 branch.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM64 macOS 3.x has failed when building commit 23e83a8.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/725/builds/2739) and take a look at the build logs.
4. Check if the failure is related to this commit (23e83a8) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/725/builds/2739

Summary of the results of the build (if available):

== Tests result: ENV CHANGED ==

410 tests OK.

10 slowest tests:

• test_signal: 4 min 17 sec
• test_concurrent_futures: 2 min 42 sec
• test_multiprocessing_spawn: 2 min 3 sec
• test_multiprocessing_forkserver: 1 min 35 sec
• test_asyncio: 1 min 30 sec
• test_logging: 1 min 12 sec
• test_nntplib: 1 min 1 sec
• test_capi: 44.4 sec
• test_ssl: 42.8 sec
• test_io: 38.2 sec

1 test altered the execution environment:
test_subprocess

23 tests skipped:
test_devpoll test_epoll test_gdb test_idle test_ioctl
test_launcher test_msilib test_multiprocessing_fork
test_ossaudiodev test_perf_profiler test_spwd test_startfile
test_tcl test_tix test_tkinter test_ttk test_ttk_textonly
test_turtle test_winconsoleio test_winreg test_winsound test_wmi
test_zipfile64

Total duration: 8 min 25 sec

Click to see traceback logs

Traceback (most recent call last):
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/threading.py", line 1049, in _bootstrap_innerself.run()
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/threading.py", line 986, in runself._target(*self._args, **self._kwargs)
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_subprocess.py", line 1348, in open_fds
fds.extend(os.pipe())
^^^^^^^^^OSError: [Errno 23] Too many open files in system
k