Nightly formatter removes multi line comments in extern blocks

[faern]

Describe the bug

If I have A multi line comment in an extern block preceding a function declaration, it is removed. But not a single line comment.

To Reproduce

If I have this code:

extern "C" {
    // A comment that is
    // spread out over
    // multiple lines
    fn a();

    // A single line comment
    fn b();
}

And format it with the nightly formatter. I end up with:

extern "C" {
    fn a();

    // A single line comment
    fn b();
}

Expected behavior

I expect both comments to be retained. As far as I know it's not invalid or unidiomatic to write a comment multi line comment on an extern declaration.

Meta

• rustfmt version: rustfmt 1.4.26-nightly (293d7d0 2020-11-14)
• From where did you install rustfmt?: rustup
• How do you run rustfmt: cargo +nighty fmt

[calebcartwright]

Duplicate of #4528

[faern]

Sorry, did not find that one when trying to look for a duplicate. Great it's being worked on already 👍

[calebcartwright]

No worries!