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Add Fiber#joinOrCancel

🍄 enhancement

Status: Open.

#4620 In typelevel/cats-effect;

· djspiewak opened on Jun 21, 2026

·  

v3.8.0

Tracing static init fails on the Scala.js WebAssembly backend

Status: Open.

#4608 In typelevel/cats-effect;

· fwbrasil opened on Jun 5, 2026

Converge on a single nomenclature for fiber blocking in docs

📚 docs

good first issue

Status: Open.

#4597 In typelevel/cats-effect;

· LukaJCB opened on May 5, 2026

Cirrus CI shutdown

⚙️ infrastructure

Status: Open.

#4590 In typelevel/cats-effect;

· durban opened on Apr 15, 2026

Queue.take.timeout(...) loses elements on cancelation

🪲 bug

Status: Open.

Bug

#4571 In typelevel/cats-effect;

· TomasMikula opened on Mar 19, 2026

Flaky DispatcherSpec on JS

Status: Open.

#4541 In typelevel/cats-effect;

· djspiewak opened on Dec 30, 2025

SIGPIPE during tests on scala-native

🪲 bug

Status: Open.

Bug

#4527 In typelevel/cats-effect;

· durban opened on Nov 23, 2025

TestContext on scala-native is not threadsafe

🪲 bug

Status: Open.

Bug

#4524 In typelevel/cats-effect;

· durban opened on Nov 18, 2025

·  

v3.7.next

Fork-with-finalizer method on GenSpawn

🍄 enhancement

Status: Open.

Feature

#4517 In typelevel/cats-effect;

· durban opened on Oct 21, 2025

OutOfMemoryError not propagated when IO originates from CompletableFuture

🪲 bug

good first issue

Status: Open.

Bug

#4505 In typelevel/cats-effect;

· tpetillot opened on Oct 13, 2025

·  

v3.6.next

Possible Issue with Timeout in Cats-Effect 3.6.x which resulted in Http4s Connection leaks

🪲 bug

Status: Open.

#4489 In typelevel/cats-effect;

· scottmartin-jh opened on Sep 18, 2025

·  

v3.6.next

Queue#mapK violates atomicity guarantees

🪲 bug

Status: Open.

#4483 In typelevel/cats-effect;

· djspiewak opened on Sep 5, 2025