Update dependency trio to v0.34.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
trio (changelog)	==0.30.0 → ==0.34.0

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Release Notes

python-trio/trio (trio)

v0.34.0

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Full Changelog: python-trio/trio@v0.33.0...v0.34.0

Features

• MemoryChannelStatistics now has a peak_buffer_used field, which reports the largest number of items that have ever been in the channel's buffer at once. This makes it easier to pick a sensible max_buffer_size based on data from a real run, instead of guessing. (#​1723)
• Support Python 3.15, as of beta 4. Things may still change and so this support may break in the future. (#​3456)

Bugfixes

• Nursery.start() now preserves the __cause__ and __context__ of exceptions raised before task_status.started() is called. (#​3261)
• Fixed incorrect error message in run_process: the stdout pipe check now correctly says "stdout" instead of "stdin". (#​3409)
• Fixed trio.Path.as_uri() on Python 3.14+ to avoid the deprecated pathlib.PurePath.as_uri() path. (#​3460)
• Fixed trio.to_thread.run_sync workers leaking spawner's Context on py314t+ free-threaded builds. (#​3472)

Deprecations and removals

• Trying to use absolute deadlines on a trio.CancelScope constructed with a relative deadline now raises, after being deprecated since Trio 0.27.0.

  To switch a cancel scope from being relative to absolute, replace the trio.CancelScope object instead of trying to mutate it. (#​3403)

v0.33.0

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Full Changelog: python-trio/trio@v0.32.0...v0.33.0

Bugfixes

• Start supporting Android's new "android" sys.platform. (#​3357)

Deprecations and removals

• Both trio.testing.RaisesGroup and trio.testing.Matcher have been deprecated. Pytest alternatives pytest.RaisesGroup and pytest.RaisesExc (respectively) are considered correct replacement. (#​3326)

v0.32.0

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Full Changelog: python-trio/trio@v0.31.0...v0.32.0

Features

• Allow trio.CapacityLimiter to have zero total_tokens. (#​3321)

Bugfixes

• Fixed a bug where iterating over an @as_safe_channel-derived ReceiveChannel would raise trio.BrokenResourceError if the channel was closed by another task. It now shuts down cleanly. (#​3331)
• trio.lowlevel.Task.iter_await_frames now works on completed tasks, by returning an empty list of frames if the underlying coroutine has been closed. Previously, it raised an internal error. (#​3337)

Removals without deprecations

• Drop support for Python 3.9. (#​3345)

Miscellaneous internal changes

• Decrease indentation for exception groups raised in trio.as_safe_channel. (#​3332)

v0.31.0

Compare Source

Full Changelog: python-trio/trio@v0.30.0...v0.31.0

Features

• Cancelled strings can now display the source and reason for a cancellation. Trio-internal sources of cancellation will set this string, and CancelScope.cancel now has a reason string parameter that can be used to attach info to any Cancelled to help in debugging. (#​3232)

Bugfixes

• Make ctrl+c work in more situations in the Trio REPL (python -m trio). (#​3007)
• Allow pickling trio.Cancelled, as they can show up when you want to pickle something else. This does not rule out pickling other NoPublicConstructor objects -- create an issue if necessary. (#​3248)
• Decrease import time on Windows by around 10%. (#​3263)
• Handle unwrapping SystemExit/KeyboardInterrupt exception gracefully in utility function raise_single_exception_from_group that reraises last exception from group. (#​3275)
• Ensure that the DTLS server does not mutate SSL context. (#​3277)
• Avoid having trio.as_safe_channel raise if closing the generator wrapped
  GeneratorExit in a BaseExceptionGroup. (#​3324)

Deprecations and removals

• Implement bool(trio.Event) and have it raise a DeprecationWarning and tell users to use trio.Event.is_set instead. This is an alternative to mypy --enable-error-code=truthy-bool for users who don't use type checking. (#​3322)

Miscellaneous internal changes

• When misnesting nurseries you now get a helpful RuntimeError instead of a catastrophic TrioInternalError. (#​3307)

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