Inner attributes on impls don't parse

[brson]

[catamorphism]

Not critical for 0.6, de-milestoning

[metajack]

I'm not sure what this means. Can you give a short example?

[ben0x539]

If I understand correctly, it's that the following doesn't parse:

struct S;

#[doc = "this works"]
/// this too
impl S {
    #[doc = "this doesn't work"];
    //! not this either
}

... where the latter attribute and doc-comment should annotate the enclosing item. Seems to be the same with traits, not just impls.

[emberian]

Reproduces

[huonw]

Triage: fixed when #10628 lands.