> an if let expression over an RWLock assumed (reasonably, but incorrectly) in its else branch that the lock had been released. Instant and virulently contagious deadlock.
I believe this behavior is changing in the 2024 edition: https://doc.rust-lang.org/edition-guide/rust-2024/temporary-...
> I believe this behavior is changing
Past tense, the 2024 edition stabilized in (and has been the default edition for `cargo new` since) Rust 1.85.
Yes, I've already performed the upgrade for my projects, but since they hit this bug, I'm guessing they haven't.
They may have upgraded by now, their source links to a thread from a year ago, prior to the 2024 edition, which may be when they encountered that particular bug.
I see now that this incident happened in September 2024 as well.