For those on matrix but not aware of any rust spaces on there, here are some links to active rooms/spaces (courtesy of @ericjmorey@programming.dev ):

https://matrix.to/#/#rust:mozilla.org

https://matrix.to/#/#rust:matrix.org

They’re both part of this Space for Rust Matrix Rooms:

https://matrix.to/#/#rust-space:matrix.org (also the main link/url of the post)

In the rust-space you’ll find a number of rooms specific to crates/libraries such as diesel and actix-web, and they seem active and open to helping people out with problems.