(FWIW, You could golf that to io::stdin().read_to_end(...), because the Read implementation for Stdin does the same locking internally: https://github.com/rust-

(FWIW, You could golf that to io::stdin().read_to_end(...), because the Read implementation for Stdin does the same locking internally: https://github.com/rust-lang/rust/blob/8f62c2920077eb5cb81323142fc5dbe6ae8813c0/src/libstd/io/stdio.rs#L298 https://github.com/rust-lang/rust/blob/8f62c2920077eb5cb8132... .)