File: duplicate-features.rs

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rustc 1.87.0%2Bdfsg1-1
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#![allow(stable_features)]

#![feature(rust1)]
#![feature(rust1)] //~ ERROR the feature `rust1` has already been enabled

#![feature(if_let)]
#![feature(if_let)] //~ ERROR the feature `if_let` has already been enabled

fn main() {}