Make trio.Path.full_match synchronous

[ybai08]

pathlib.PurePath.full_match() (added in Python 3.13) only works on the path string, the same way match() does. But trio.Path wraps it with _wrap_method(pathlib.Path.full_match), so on 3.13+ it runs in a worker thread and gives back a coroutine:

>>> trio.Path("a.txt").full_match("*.py")
<coroutine object PurePath.full_match at 0x...>
>>> bool(_)
True

So if path.full_match(pattern): is always true, and Python warns that the coroutine was never awaited. trio.Path.match() and the other pure methods are inherited from PurePath and stay synchronous. The wrapper came in with the 3.13 bring-up in #3005. Running mypy --python-version 3.14 on src/trio/_path.py also reports it: the override's Awaitable[bool] doesn't match PurePath.full_match returning bool. CI runs mypy at 3.10, so CI doesn't hit that check.

This removes the wrapper, so trio.Path uses the inherited PurePath.full_match. If any code does await path.full_match(...), it will now fail with TypeError: object bool can't be used in 'await' expression. The newsfragment is filed as bugfix. I'm happy to change it to breaking if you'd rather.

Test: test_full_match_is_sync in src/trio/_tests/test_path.py. It is skipped below 3.13.

What was run locally (macOS arm64)

• Python 3.14.7: pytest src/trio/_tests/test_path.py. Before the fix, test_full_match_is_sync fails with assert <coroutine object PurePath.full_match at ...> is True. After the fix: 40 passed, 1 skipped.
• Python 3.13.15: test_path.py 40 passed, 1 skipped. Python 3.12.14: 39 passed, 2 skipped (the new test is skipped).
• Full pytest src/trio on 3.14: 823 passed, 73 skipped, 3 xfailed (main: 822 passed, 73 skipped, 3 xfailed).
• mypy --platform linux --python-version 3.14 src/trio/_path.py src/trio/_tests/test_path.py: clean. On main the same command reports the full_match override error.
• mypy --platform {linux,darwin,win32} src/trio (config python_version 3.10, run from a 3.14 venv): 28 errors in 5 unrelated files, the same set as on main. None are in the changed files.
• pytest --run-slow src/trio/_tests/test_exports.py: 8 failures, the same 8 as on main (pyright --verifytypes and jedi __notes__, both from the local environment). The mypy class-member checks pass.
• black --check and ruff check on the changed files: clean.
• Not run: the tox -e typing / type_completeness envs, Windows, Linux, PyPy.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00000%. Comparing base (4630d02) to head (5bdd013).

Additional details and impacted files

@@               Coverage Diff               @@
##                 main        #3547   +/-   ##
===============================================
  Coverage   100.00000%   100.00000%           
===============================================
  Files             128          128           
  Lines           19474        19480    +6     
  Branches         1323         1323           
===============================================
+ Hits            19474        19480    +6     

Files with missing lines	Coverage Δ
src/trio/_path.py	100.00000% <ø> (ø)
src/trio/_tests/test_path.py	100.00000% <100.00000%> (ø)

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