rustfmt requires two runs to converge on contrived input

[jrose-signal]

fn test(input: Foo) {
    match input {
        Foo::Bar => {
            ;
            Baz {
                field: 0
            }
        }
    }
}

Given this admittedly contrived input, running rustfmt once removes the semicolon. Running it a second time removes the braces for the match body.

I don't know if rustfmt has a rule about being idempotent, but it certainly would surprise me to regularly encounter situations where I have to manually run it to a fixed point.

Tested in the playground, 1.8.0-stable (2024-11-26 90b35a6239).

[ytmimi]

Yes, the output should be idempotent. Thanks for reporting this!

[ytmimi]

Related to #6116, but I'm not sure if this is a duplicate.

[mu001999]

I tested and this can be fixed by #6128, so this is a duplicate

[ytmimi]

From what I can tell, #6128 doesn't resolve this, though the fix might be something similar.

Formatting the input produces:

fn test(input: Foo) {
    match input {
        Foo::Bar => {
            Baz { field: 0 }
        }
    }
}

And formatting the snippet above outputs:

fn test(input: Foo) {
    match input {
        Foo::Bar => Baz { field: 0 },
    }
}