v3.4.9

This is the fortieth release in the Cats Effect 3.x lineage. It is fully binary compatible with every 3.x release, and fully source-compatible with every 3.4.x release. Note that source compatibility has been broken with 3.3.x in some minor areas. Since those changes require active choice on the part of users to decide the best adjusted usage for their specific scenario, we have chosen to not provide scalafixes which automatically patch the affected call sites.

User-Facing Pull Requests

• #3510 – Dispatcher: check for outstanding actions before release (@samspills)
• #3530 – forward raceOutcome to correct implementation (@Jasper-M)
• #3487 – Dispatcher error reporting (@samspills)
• #3492 – Removed unneeded prefetch in IOFiber (@djspiewak)
• #3498 – Add flush to print functions in std.Console (@zetashift)
• #3489 – Actually restore IODeferred specialization (@armanbilge)
• #3475 – report failures during unsafeRunAndForget (@samspills)
• #3467 – IOFiber#toString (@durban)
• #3454 – Ensure that deadlock detection considers results availability (@djspiewak)
• #3479, #3462, #3485, #3451 – Documentation fixes and improvements (@durban, @djspiewak, @matelaszlo, @Wosin)

Special thanks to each and every one of you!