Cancelling TaskGroup.start() cancels TaskGroup itself (only for asyncio backend)
#710
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Isn't this a duplicate of #685? |
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It might be, I don't really understand whether or not it's exactly the same. |
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I think it probably at least stems from the same issue which I intend to fix for the next release. |
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Thanks! That would be awesome. Feel free to close this or copy over the snippet as an additional test case if you prefer that. |
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mkjpryor
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May 28, 2024
Bumps [anyio](https://github.com/agronholm/anyio) from 4.3.0 to 4.4.0. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/agronholm/anyio/releases">anyio's releases</a>.</em></p> <blockquote> <h2>4.4.0</h2> <ul> <li>Added the <code>BlockingPortalProvider</code> class to aid with constructing synchronous counterparts to asynchronous interfaces that would otherwise require multiple blocking portals</li> <li>Added <code>__slots__</code> to <code>AsyncResource</code> so that child classes can use <code>__slots__</code> (<a href="https://redirect.github.com/agronholm/anyio/pull/733">#733</a>; PR by Justin Su)</li> <li>Added the <code>TaskInfo.has_pending_cancellation()</code> method</li> <li>Fixed erroneous <code>RuntimeError: called 'started' twice on the same task status</code> when cancelling a task in a TaskGroup created with the <code>start()</code> method before the first checkpoint is reached after calling <code>task_status.started()</code> (<a href="https://redirect.github.com/agronholm/anyio/issues/706">#706</a>; PR by Dominik Schwabe)</li> <li>Fixed two bugs with <code>TaskGroup.start()</code> on asyncio: <ul> <li>Fixed erroneous <code>RuntimeError: called 'started' twice on the same task status</code> when cancelling a task in a TaskGroup created with the <code>start()</code> method before the first checkpoint is reached after calling <code>task_status.started()</code> (<a href="https://redirect.github.com/agronholm/anyio/issues/706">#706</a>; PR by Dominik Schwabe)</li> <li>Fixed the entire task group being cancelled if a <code>TaskGroup.start()</code> call gets cancelled (<a href="https://redirect.github.com/agronholm/anyio/issues/685">#685</a>, <a href="https://redirect.github.com/agronholm/anyio/issues/710">#710</a>)</li> </ul> </li> <li>Fixed a race condition that caused crashes when multiple event loops of the same backend were running in separate threads and simultaneously attempted to use AnyIO for their first time (<a href="https://redirect.github.com/agronholm/anyio/issues/425">#425</a>; PR by David Jiricek and Ganden Schaffner)</li> <li>Fixed cancellation delivery on asyncio incrementing the wrong cancel scope's cancellation counter when cascading a cancel operation to a child scope, thus failing to uncancel the host task (<a href="https://redirect.github.com/agronholm/anyio/issues/716">#716</a>)</li> <li>Fixed erroneous <code>TypedAttributeLookupError</code> if a typed attribute getter raises <code>KeyError</code></li> <li>Fixed the asyncio backend not respecting the <code>PYTHONASYNCIODEBUG</code> environment variable when setting the <code>debug</code> flag in <code>anyio.run()</code></li> <li>Fixed <code>SocketStream.receive()</code> not detecting EOF on asyncio if there is also data in the read buffer (<a href="https://redirect.github.com/agronholm/anyio/issues/701">#701</a>)</li> <li>Fixed <code>MemoryObjectStream</code> dropping an item if the item is delivered to a recipient that is waiting to receive an item but has a cancellation pending (<a href="https://redirect.github.com/agronholm/anyio/issues/728">#728</a>)</li> <li>Emit a <code>ResourceWarning</code> for <code>MemoryObjectReceiveStream</code> and <code>MemoryObjectSendStream</code> that were garbage collected without being closed (PR by Andrey Kazantcev)</li> <li>Fixed <code>MemoryObjectSendStream.send()</code> not raising <code>BrokenResourceError</code> when the last corresponding <code>MemoryObjectReceiveStream</code> is closed while waiting to send a falsey item (<a href="https://redirect.github.com/agronholm/anyio/issues/731">#731</a>; PR by Ganden Schaffner)</li> </ul> </blockquote> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/agronholm/anyio/blob/master/docs/versionhistory.rst">anyio's changelog</a>.</em></p> <blockquote> <h1>Version history</h1> <p>This library adheres to <code>Semantic Versioning 2.0 <http://semver.org/></code>_.</p> <p><strong>4.4.0</strong></p> <ul> <li> <p>Added the <code>BlockingPortalProvider</code> class to aid with constructing synchronous counterparts to asynchronous interfaces that would otherwise require multiple blocking portals</p> </li> <li> <p>Added <code>__slots__</code> to <code>AsyncResource</code> so that child classes can use <code>__slots__</code> (<code>[#733](agronholm/anyio#733) <https://github.com/agronholm/anyio/pull/733></code>_; PR by Justin Su)</p> </li> <li> <p>Added the <code>TaskInfo.has_pending_cancellation()</code> method</p> </li> <li> <p>Fixed erroneous <code>RuntimeError: called 'started' twice on the same task status</code> when cancelling a task in a TaskGroup created with the <code>start()</code> method before the first checkpoint is reached after calling <code>task_status.started()</code> (<code>[#706](agronholm/anyio#706) <https://github.com/agronholm/anyio/issues/706></code>_; PR by Dominik Schwabe)</p> </li> <li> <p>Fixed two bugs with <code>TaskGroup.start()</code> on asyncio:</p> <ul> <li>Fixed erroneous <code>RuntimeError: called 'started' twice on the same task status</code> when cancelling a task in a TaskGroup created with the <code>start()</code> method before the first checkpoint is reached after calling <code>task_status.started()</code> (<code>[#706](agronholm/anyio#706) <https://github.com/agronholm/anyio/issues/706></code>_; PR by Dominik Schwabe)</li> <li>Fixed the entire task group being cancelled if a <code>TaskGroup.start()</code> call gets cancelled (<code>[#685](agronholm/anyio#685) <https://github.com/agronholm/anyio/issues/685></code><em>, <code>[#710](agronholm/anyio#710) <https://github.com/agronholm/anyio/issues/710></code></em>)</li> </ul> </li> <li> <p>Fixed a race condition that caused crashes when multiple event loops of the same backend were running in separate threads and simultaneously attempted to use AnyIO for their first time (<code>[#425](agronholm/anyio#425) <https://github.com/agronholm/anyio/issues/425></code>_; PR by David Jiricek and Ganden Schaffner)</p> </li> <li> <p>Fixed cancellation delivery on asyncio incrementing the wrong cancel scope's cancellation counter when cascading a cancel operation to a child scope, thus failing to uncancel the host task (<code>[#716](agronholm/anyio#716) <https://github.com/agronholm/anyio/issues/716></code>_)</p> </li> <li> <p>Fixed erroneous <code>TypedAttributeLookupError</code> if a typed attribute getter raises <code>KeyError</code></p> </li> <li> <p>Fixed the asyncio backend not respecting the <code>PYTHONASYNCIODEBUG</code> environment variable when setting the <code>debug</code> flag in <code>anyio.run()</code></p> </li> <li> <p>Fixed <code>SocketStream.receive()</code> not detecting EOF on asyncio if there is also data in the read buffer (<code>[#701](agronholm/anyio#701) <https://github.com/agronholm/anyio/issues/701></code>_)</p> </li> <li> <p>Fixed <code>MemoryObjectStream</code> dropping an item if the item is delivered to a recipient that is waiting to receive an item but has a cancellation pending (<code>[#728](agronholm/anyio#728) <https://github.com/agronholm/anyio/issues/728></code>_)</p> </li> <li> <p>Emit a <code>ResourceWarning</code> for <code>MemoryObjectReceiveStream</code> and <code>MemoryObjectSendStream</code> that were garbage collected without being closed (PR by Andrey Kazantcev)</p> </li> <li> <p>Fixed <code>MemoryObjectSendStream.send()</code> not raising <code>BrokenResourceError</code> when the last corresponding <code>MemoryObjectReceiveStream</code> is closed while waiting to send a falsey item (<code>[#731](agronholm/anyio#731) <https://github.com/agronholm/anyio/issues/731></code>_; PR by Ganden Schaffner)</p> </li> </ul> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/agronholm/anyio/commit/053e8f0a0f7b0f4a47a012eb5c6b1d9d84344e6a"><code>053e8f0</code></a> Bumped up the version</li> <li><a href="https://github.com/agronholm/anyio/commit/e7f750b96f5416d8ae932e15d726b5d03de80b67"><code>e7f750b</code></a> Fixed memory object stream sometimes dropping sent items (<a href="https://redirect.github.com/agronholm/anyio/issues/735">#735</a>)</li> <li><a href="https://github.com/agronholm/anyio/commit/9f5f14b3eb57f6965fc2c16879df93263bb020ea"><code>9f5f14b</code></a> Fixed task group getting cancelled if start() gets cancelled (<a href="https://redirect.github.com/agronholm/anyio/issues/717">#717</a>)</li> <li><a href="https://github.com/agronholm/anyio/commit/8b648bc213a85613b9441913b82a14d9cd839048"><code>8b648bc</code></a> Adjusted the pull request template</li> <li><a href="https://github.com/agronholm/anyio/commit/3ff5e9a6f1813152a7cc9ff27a8394a51812a040"><code>3ff5e9a</code></a> Rearranged changelog items</li> <li><a href="https://github.com/agronholm/anyio/commit/541d1f8197dfa36076f93b39e73ee5ad06012469"><code>541d1f8</code></a> [pre-commit.ci] pre-commit autoupdate (<a href="https://redirect.github.com/agronholm/anyio/issues/734">#734</a>)</li> <li><a href="https://github.com/agronholm/anyio/commit/8a076900333b6b333f1748dd8d1e8ae8079a2924"><code>8a07690</code></a> Fix <code>MemoryObjectSendStream.send(falsey)</code> not raising <code>BrokenResourceError</code> w...</li> <li><a href="https://github.com/agronholm/anyio/commit/4b3de9737672df67b691f38543427e4869639f45"><code>4b3de97</code></a> Adjust the headings in the PR template</li> <li><a href="https://github.com/agronholm/anyio/commit/dfc44cf3c8c5444713258d0f1fda03e425240054"><code>dfc44cf</code></a> Added <code>__slots__</code> to <code>AsyncResource</code> (<a href="https://redirect.github.com/agronholm/anyio/issues/733">#733</a>)</li> <li><a href="https://github.com/agronholm/anyio/commit/96920b054c4d0c76ad440f36d7173ab5d5c86948"><code>96920b0</code></a> Fix typo in PR template (<a href="https://redirect.github.com/agronholm/anyio/issues/730">#730</a>)</li> <li>Additional commits viewable in <a href="https://github.com/agronholm/anyio/compare/4.3.0...4.4.0">compare view</a></li> </ul> </details> <br /> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. 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mkjpryor
pushed a commit
to stackhpc/azimuth
that referenced
this issue
May 28, 2024
Bumps [anyio](https://github.com/agronholm/anyio) from 4.3.0 to 4.4.0. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/agronholm/anyio/releases">anyio's releases</a>.</em></p> <blockquote> <h2>4.4.0</h2> <ul> <li>Added the <code>BlockingPortalProvider</code> class to aid with constructing synchronous counterparts to asynchronous interfaces that would otherwise require multiple blocking portals</li> <li>Added <code>__slots__</code> to <code>AsyncResource</code> so that child classes can use <code>__slots__</code> (<a href="https://redirect.github.com/agronholm/anyio/pull/733">#733</a>; PR by Justin Su)</li> <li>Added the <code>TaskInfo.has_pending_cancellation()</code> method</li> <li>Fixed erroneous <code>RuntimeError: called 'started' twice on the same task status</code> when cancelling a task in a TaskGroup created with the <code>start()</code> method before the first checkpoint is reached after calling <code>task_status.started()</code> (<a href="https://redirect.github.com/agronholm/anyio/issues/706">#706</a>; PR by Dominik Schwabe)</li> <li>Fixed two bugs with <code>TaskGroup.start()</code> on asyncio: <ul> <li>Fixed erroneous <code>RuntimeError: called 'started' twice on the same task status</code> when cancelling a task in a TaskGroup created with the <code>start()</code> method before the first checkpoint is reached after calling <code>task_status.started()</code> (<a href="https://redirect.github.com/agronholm/anyio/issues/706">#706</a>; PR by Dominik Schwabe)</li> <li>Fixed the entire task group being cancelled if a <code>TaskGroup.start()</code> call gets cancelled (<a href="https://redirect.github.com/agronholm/anyio/issues/685">#685</a>, <a href="https://redirect.github.com/agronholm/anyio/issues/710">#710</a>)</li> </ul> </li> <li>Fixed a race condition that caused crashes when multiple event loops of the same backend were running in separate threads and simultaneously attempted to use AnyIO for their first time (<a href="https://redirect.github.com/agronholm/anyio/issues/425">#425</a>; PR by David Jiricek and Ganden Schaffner)</li> <li>Fixed cancellation delivery on asyncio incrementing the wrong cancel scope's cancellation counter when cascading a cancel operation to a child scope, thus failing to uncancel the host task (<a href="https://redirect.github.com/agronholm/anyio/issues/716">#716</a>)</li> <li>Fixed erroneous <code>TypedAttributeLookupError</code> if a typed attribute getter raises <code>KeyError</code></li> <li>Fixed the asyncio backend not respecting the <code>PYTHONASYNCIODEBUG</code> environment variable when setting the <code>debug</code> flag in <code>anyio.run()</code></li> <li>Fixed <code>SocketStream.receive()</code> not detecting EOF on asyncio if there is also data in the read buffer (<a href="https://redirect.github.com/agronholm/anyio/issues/701">#701</a>)</li> <li>Fixed <code>MemoryObjectStream</code> dropping an item if the item is delivered to a recipient that is waiting to receive an item but has a cancellation pending (<a href="https://redirect.github.com/agronholm/anyio/issues/728">#728</a>)</li> <li>Emit a <code>ResourceWarning</code> for <code>MemoryObjectReceiveStream</code> and <code>MemoryObjectSendStream</code> that were garbage collected without being closed (PR by Andrey Kazantcev)</li> <li>Fixed <code>MemoryObjectSendStream.send()</code> not raising <code>BrokenResourceError</code> when the last corresponding <code>MemoryObjectReceiveStream</code> is closed while waiting to send a falsey item (<a href="https://redirect.github.com/agronholm/anyio/issues/731">#731</a>; PR by Ganden Schaffner)</li> </ul> </blockquote> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/agronholm/anyio/blob/master/docs/versionhistory.rst">anyio's changelog</a>.</em></p> <blockquote> <h1>Version history</h1> <p>This library adheres to <code>Semantic Versioning 2.0 <http://semver.org/></code>_.</p> <p><strong>4.4.0</strong></p> <ul> <li> <p>Added the <code>BlockingPortalProvider</code> class to aid with constructing synchronous counterparts to asynchronous interfaces that would otherwise require multiple blocking portals</p> </li> <li> <p>Added <code>__slots__</code> to <code>AsyncResource</code> so that child classes can use <code>__slots__</code> (<code>[#733](agronholm/anyio#733) <https://github.com/agronholm/anyio/pull/733></code>_; PR by Justin Su)</p> </li> <li> <p>Added the <code>TaskInfo.has_pending_cancellation()</code> method</p> </li> <li> <p>Fixed erroneous <code>RuntimeError: called 'started' twice on the same task status</code> when cancelling a task in a TaskGroup created with the <code>start()</code> method before the first checkpoint is reached after calling <code>task_status.started()</code> (<code>[#706](agronholm/anyio#706) <https://github.com/agronholm/anyio/issues/706></code>_; PR by Dominik Schwabe)</p> </li> <li> <p>Fixed two bugs with <code>TaskGroup.start()</code> on asyncio:</p> <ul> <li>Fixed erroneous <code>RuntimeError: called 'started' twice on the same task status</code> when cancelling a task in a TaskGroup created with the <code>start()</code> method before the first checkpoint is reached after calling <code>task_status.started()</code> (<code>[#706](agronholm/anyio#706) <https://github.com/agronholm/anyio/issues/706></code>_; PR by Dominik Schwabe)</li> <li>Fixed the entire task group being cancelled if a <code>TaskGroup.start()</code> call gets cancelled (<code>[#685](agronholm/anyio#685) <https://github.com/agronholm/anyio/issues/685></code><em>, <code>[#710](agronholm/anyio#710) <https://github.com/agronholm/anyio/issues/710></code></em>)</li> </ul> </li> <li> <p>Fixed a race condition that caused crashes when multiple event loops of the same backend were running in separate threads and simultaneously attempted to use AnyIO for their first time (<code>[#425](agronholm/anyio#425) <https://github.com/agronholm/anyio/issues/425></code>_; PR by David Jiricek and Ganden Schaffner)</p> </li> <li> <p>Fixed cancellation delivery on asyncio incrementing the wrong cancel scope's cancellation counter when cascading a cancel operation to a child scope, thus failing to uncancel the host task (<code>[#716](agronholm/anyio#716) <https://github.com/agronholm/anyio/issues/716></code>_)</p> </li> <li> <p>Fixed erroneous <code>TypedAttributeLookupError</code> if a typed attribute getter raises <code>KeyError</code></p> </li> <li> <p>Fixed the asyncio backend not respecting the <code>PYTHONASYNCIODEBUG</code> environment variable when setting the <code>debug</code> flag in <code>anyio.run()</code></p> </li> <li> <p>Fixed <code>SocketStream.receive()</code> not detecting EOF on asyncio if there is also data in the read buffer (<code>[#701](agronholm/anyio#701) <https://github.com/agronholm/anyio/issues/701></code>_)</p> </li> <li> <p>Fixed <code>MemoryObjectStream</code> dropping an item if the item is delivered to a recipient that is waiting to receive an item but has a cancellation pending (<code>[#728](agronholm/anyio#728) <https://github.com/agronholm/anyio/issues/728></code>_)</p> </li> <li> <p>Emit a <code>ResourceWarning</code> for <code>MemoryObjectReceiveStream</code> and <code>MemoryObjectSendStream</code> that were garbage collected without being closed (PR by Andrey Kazantcev)</p> </li> <li> <p>Fixed <code>MemoryObjectSendStream.send()</code> not raising <code>BrokenResourceError</code> when the last corresponding <code>MemoryObjectReceiveStream</code> is closed while waiting to send a falsey item (<code>[#731](agronholm/anyio#731) <https://github.com/agronholm/anyio/issues/731></code>_; PR by Ganden Schaffner)</p> </li> </ul> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/agronholm/anyio/commit/053e8f0a0f7b0f4a47a012eb5c6b1d9d84344e6a"><code>053e8f0</code></a> Bumped up the version</li> <li><a href="https://github.com/agronholm/anyio/commit/e7f750b96f5416d8ae932e15d726b5d03de80b67"><code>e7f750b</code></a> Fixed memory object stream sometimes dropping sent items (<a href="https://redirect.github.com/agronholm/anyio/issues/735">#735</a>)</li> <li><a href="https://github.com/agronholm/anyio/commit/9f5f14b3eb57f6965fc2c16879df93263bb020ea"><code>9f5f14b</code></a> Fixed task group getting cancelled if start() gets cancelled (<a href="https://redirect.github.com/agronholm/anyio/issues/717">#717</a>)</li> <li><a href="https://github.com/agronholm/anyio/commit/8b648bc213a85613b9441913b82a14d9cd839048"><code>8b648bc</code></a> Adjusted the pull request template</li> <li><a href="https://github.com/agronholm/anyio/commit/3ff5e9a6f1813152a7cc9ff27a8394a51812a040"><code>3ff5e9a</code></a> Rearranged changelog items</li> <li><a href="https://github.com/agronholm/anyio/commit/541d1f8197dfa36076f93b39e73ee5ad06012469"><code>541d1f8</code></a> [pre-commit.ci] pre-commit autoupdate (<a href="https://redirect.github.com/agronholm/anyio/issues/734">#734</a>)</li> <li><a href="https://github.com/agronholm/anyio/commit/8a076900333b6b333f1748dd8d1e8ae8079a2924"><code>8a07690</code></a> Fix <code>MemoryObjectSendStream.send(falsey)</code> not raising <code>BrokenResourceError</code> w...</li> <li><a href="https://github.com/agronholm/anyio/commit/4b3de9737672df67b691f38543427e4869639f45"><code>4b3de97</code></a> Adjust the headings in the PR template</li> <li><a href="https://github.com/agronholm/anyio/commit/dfc44cf3c8c5444713258d0f1fda03e425240054"><code>dfc44cf</code></a> Added <code>__slots__</code> to <code>AsyncResource</code> (<a href="https://redirect.github.com/agronholm/anyio/issues/733">#733</a>)</li> <li><a href="https://github.com/agronholm/anyio/commit/96920b054c4d0c76ad440f36d7173ab5d5c86948"><code>96920b0</code></a> Fix typo in PR template (<a href="https://redirect.github.com/agronholm/anyio/issues/730">#730</a>)</li> <li>Additional commits viewable in <a href="https://github.com/agronholm/anyio/compare/4.3.0...4.4.0">compare view</a></li> </ul> </details> <br /> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) </details> Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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Things to check first
I have searched the existing issues and didn't find my bug already reported there
I have checked that my bug is still present in the latest release
AnyIO version
4.3.0
Python version
3.11.6
What happened?
Consider this snippet:
Here we spawn a task using
TaskGroup.start()then we cancel the.start()call usingmove_on_after. It turns out this cancels the task group as a whole.I'd expect this to cancel only that particular task.
For the
triobackend, this works fine, and does not cancel the task group.How can we reproduce the bug?
(see snippet above)
The text was updated successfully, but these errors were encountered: