Bad diagnostics using ? operator on Option<Cow<'_, str>> [E507]

[djc]

Code

use std::borrow::Cow;

struct Foo<'a> {
    list: Vec<Bar<'a>>,
}

impl<'a> Foo<'a> {
    fn bar(&self) -> Option<String> {
        Some(self.list.first()?.inner?.into_owned())
    }
}

struct Bar<'a> {
    inner: Option<Cow<'a, str>>,
}

Current output

error[E0507]: cannot move out of a shared reference
 --> src/lib.rs:9:14
  |
9 |         Some(self.list.first()?.inner?.into_owned())
  |              ^^^^^^^^^^^^^^^^^^^^^^^^-
  |              |
  |              value moved due to this method call
  |              move occurs because value has type `Option<Cow<'_, str>>`, which does not implement the `Copy` trait
  |
note: `branch` takes ownership of the receiver `self`, which moves value
 --> /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/core/src/ops/try_trait.rs:217:15
help: you can `clone` the value and consume it, but this might not be your desired behavior
  |
9 |         Some(clone().self.list.first()?.inner?.into_owned())
  |              ++++++++

For more information about this error, try `rustc --explain E0507`.

Desired output

No response

Rationale and extra context

Pointing to some anonymous branch() method from (what I presume is) an impl for Try feels very unhelpful here. Note also the strange suggestion which wants me to add a bare clone() call before the expression...

Other cases

No response

Anything else?

No response

[fmease]

Thanks for the bug report. However, it's already fixed on beta and nightly. In the future, please double-check if your issue has already been fixed on nightly before opening an issue.

Closing as duplicate of #111016 (fixed by #112945).

[djc]

Oops, sorry and thanks for following up!

[fmease]

All good 👍