rustdoc: redundant `where 'env: 'env`

Source: https://docs.rs/crossbeam/0.7.1/crossbeam/thread/struct.Scope.html

Generated by rustdoc:

pub struct Scope<'env>
where
    'env: 'env,
 { /* fields omitted */ }

Original code:

pub struct Scope<'env> {
    handles: SharedVec<SharedOption<thread::JoinHandle<()>>>,
    wait_group: WaitGroup,
    _marker: PhantomData<&'env mut &'env ()>,
}

Rustdoc has somehow inferred the 'env: 'env bound, which is a tautology.

[ollie27]

This needs to be reopened because #58894 didn't actually fix this. An example from std is https://doc.rust-lang.org/nightly/std/fmt/struct.Arguments.html

[jyn514]

This is no longer present for Arguments on nightly ... can someone come up with an MVCE?

[jyn514]

Since Arguments is fixed on master and Scope works as well, I'm going to close this. Feel free to reopen if you find somewhere else this bug appears.