Issues

• A try_lock falling inside another thread's lock hold is never explored

  tokio-rs/loom#426 · Filter by author annawaw opened on Sep 24, 2026

• Loom immediately panics under LOOM_CHECKPOINT_FILE

  tokio-rs/loom#425 · Filter by author SLiV9 opened on Sep 17, 2026

• Mutex doesn't synchronize atomic operations properly when the reader did an RMW before locking

  tokio-rs/loom#424 · Filter by author wyfo opened on Sep 16, 2026

• "invalid internal loom state" panic when holding 2 read locks on an RwLock

  tokio-rs/loom#423 · Filter by author SludgePhD opened on Aug 19, 2026

• Condvar::{wait, notify_*} interfere with the thread::park() token

  tokio-rs/loom#422 · Filter by author SludgePhD opened on Aug 18, 2026

• Thread panic is not caught

  tokio-rs/loom#417 · Filter by author wyfo opened on Jul 12, 2026
  1

• loom::future::block_on waker vtable is not stable across clone on release build

  tokio-rs/loom#416 · Filter by author wyfo opened on Jun 21, 2026
  1

• Tokio support for Loom

  tokio-rs/loom#408 · Filter by author ongardie-atomix opened on May 6, 2026
  2

• Impossible model scenarios arising from relationships hidden by non-loom primitives

  tokio-rs/loom#407 · Filter by author eggyal opened on Apr 30, 2026

• Potential soundness issue in loom::lazy_static::Lazy::get returning static reference beyond execution lifetime

  tokio-rs/loom#406 · Filter by author yilin0518 opened on Mar 11, 2026
  1

• Different API between tokio::sync::Notify and loom::sync::Notify.

  tokio-rs/loom#402 · Filter by author xuxiaocheng0201 opened on Jan 27, 2026
  1

• src/rt/object.rs: index out of bounds: the len is 0 but the index is [number-bigger-than-0]

  tokio-rs/loom#399 · Filter by author vincent-thomas opened on Nov 10, 2025

• mpmc: too many branches

  tokio-rs/loom#398 · Filter by author ghost opened on Oct 28, 2025

• [Feature Request] Support for RwLockWriteGuard::downgrade

  tokio-rs/loom#397 · Filter by author andrewsonin opened on Oct 16, 2025

• Missing thread::scope() API

  tokio-rs/loom#396 · Filter by author gendx opened on Oct 14, 2025

• Missing impl FromIterator<T> for Arc[T]

  tokio-rs/loom#395 · Filter by author gendx opened on Oct 14, 2025

• Mirror PoisonError from the standard library?

  tokio-rs/loom#394 · Filter by author gendx opened on Oct 14, 2025

• Missing Condvar::wait_while API

  tokio-rs/loom#393 · Filter by author gendx opened on Oct 14, 2025
  1

• Atomic load makes threads not explore at all

  tokio-rs/loom#392 · Filter by author ZobyTwo opened on Oct 9, 2025
  2

• Weird failing assertions

  tokio-rs/loom#389 · Filter by author ZobyTwo opened on Sep 12, 2025
  6

• Drop dependency on generator

  tokio-rs/loom#388 · Filter by author weiznich opened on Sep 11, 2025
  1

• rt::Allocation doesn't alert on double-free

  tokio-rs/loom#384 · Filter by author abonander opened on Jul 26, 2025

• index out of bounds: the len is 4 but the index is 140353459346585

  tokio-rs/loom#378 · Filter by author Lslightly opened on Mar 22, 2025
  1

• AtomicWaker points to nonexistent tokio::sync::AtomicWaker

  tokio-rs/loom#377 · Filter by author kpreid opened on Mar 11, 2025
  1

• loom reports deadlock for Mutex::try_lock

  tokio-rs/loom#376 · Filter by author mox692 opened on Mar 8, 2025