cargo check duplicated info

[GopherJ]

Problem
after upgrading to latest rustc 1.50.0-nightly (eb4fc71dc 2020-12-17), I start to get duplicated warnings

Steps

use std::fs::File;
fn main() {
    println!("Hello, world!");
}

2. set alias alias ck='cargo check --all-targets'
3. run ck

Possible Solution(s)

Notes

Output of cargo version: cargo 1.50.0-nightly (d274fcf86 2020-12-07)

[GopherJ]

This error happens on the first cargo check, it disappears since the second run of cargo check

[ehuss]

Hm, I'm having a hard time trying to figure out how to reproduce this. Is this easily reproducible for you? Did you maybe use other flags like --all-targets? Can you show the whole output of cargo check -v after running cargo clean?

[GopherJ]

@ehuss yes I'm using --all-targets, thanks for reminding me if this

alias

[ehuss]

Ah, in that case I'll close as a duplicate of #5128. When you check multiple targets, some code gets checked multiple times (for example, the library gets checked as a normal library, and checked separately with the --test flag to check unit tests). That fundamentally can't be avoided, but I do intend to add some kind of message deduplication logic to Cargo.