[insanitybit]

FWIW Arc implements From<T> so you can do `let foo = blah().into()` and if `foo` is passed to something expecting Arc it'll be an Arc. This probably works for Arc<Mutex<T>> as well so you'd be able to do `.into().into()` but I'm not sure.

[bobbylarrybobby]

Iirc you can't chain .into() because the compiler can't be sure whether the first is meant to do the whole conversion and the second is the identity (impl From<T> for T), or if the first does one step and the second the next or if the first is the identity and the second does the whole conversion. (In fact I think the existence of the first and third options alone is enough to preclude chained .into() from working due to the ambiguity.)

[insanitybit]

You're right.