gh-96478: Test @overload on C functions

[sobolevn]

Now, we have this covered, including a side-effect.

• Issue: @overload decorator on compiled functions is not tested #96478

[miss-islington]

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

[miss-islington]

Sorry @sobolevn and @JelleZijlstra, I had trouble checking out the 3.11 backport branch.
Please backport using cherry_picker on command line.
cherry_picker f177f6f29b069f522a0b3ba44eaae19852b6d2b0 3.11

[miss-islington]

Thanks @sobolevn for the PR, and @JelleZijlstra for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖 I'm not a witch! I'm not a witch!

[bedevere-bot]

GH-96604 is a backport of this pull request to the 3.11 branch.

[sweeneyde]

I think this may be the cause of some buildbot failures.

In particular, on the second repetition of the test suite (e.g., when running -R3:3), I get this:

test test_typing failed -- Traceback (most recent call last):
  File "C:\Users\sween\Source\Repos\cpython2\cpython\Lib\unittest\mock.py", line 1359, in patched
    return func(*newargs, **newkeywargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\sween\Source\Repos\cpython2\cpython\Lib\test\test_typing.py", line 4398, in test_overload_on_compiled_functions
    self.assertEqual(typing._overload_registry, {})
AssertionError: defaultdict(<function OverloadTests.<lamb[91 chars]}})}) != {}

test_typing failed (1 failure)

cc @pablogsal

[sobolevn]

Fixed in #96615

[sweeneyde]

Ah my bad, thanks!

[vstinner]

I think this may be the cause of some buildbot failures. In particular, on the second repetition of the test suite (e.g., when running -R3:3), I get this: (...) test_overload_on_compiled_functions() (...)

Right, all Refleaks 3.11 buildbots are failing since commit 2a5e333: the 3.11 branch also needs PR #96615 fix.

=> I created PR #97601 backport to fix test_typing in the 3.11 branch.