error[internal]: left behind trailing whitespace

[iacore]

To reproduce:

git clone https://github.com/kamel78/efficient-rust-pairings/
cd efficient-rust-pairings
cargo fmt

[CrazyboyQCD]

Can be reproduced with this, not sure if it is the same cause.

fn main() {
    let v = 
        1
        // 2
        ;
}

[ytmimi]

@iacore please post a small code snippet here that can be used to reproduce the issue. It's difficult for the team to go searching for the issue in your repo.

[iacore]

pub const BLS12_381_PARAMS : CurveParams<4,16,2,4> = CurveParams 
            {               security_level:128,
                            modulo_as_strhex:"0x1a0111ea397fe69a4b1ba7b6434bacd764774b84f38512bf6730d2a0f6b0f6241eabfffeb153ffffb9feffffffffaaab",
            };

[ytmimi]

Because of the long string literal rustfmt fails to format the constant and therefore leaves existing trailing whitespace. There's nothing rustfmt can do in this situation. As the developer just remove the trailing whitespace in the source code.

[iacore]

What do you mean? Why can't the constant be preserved as-is?