warning: unnecessary braces around `return` value --> a.rs:3:15 | 3 | if return { return } { return } else { return } | ^^ ^^ | = note: `#[warn(unused_braces)]` on by default help: remove these braces | 3 - if return { return } { return } else { return } 3 + if return return { return } else { return } | warning: 1 warning emitted 

#[allow(unreachable_code)] #[warn(unused_braces)] fn main() { if return return { return } else { return } } 

error: this `if` expression is missing a block after the condition --> a.rs:5:5 | 5 | if return return { return } else { return } | ^^ | help: add a block here --> a.rs:5:32 | 5 | if return return { return } else { return } | ^ warning: unnecessary braces around `return` value --> a.rs:5:22 | 5 | if return return { return } else { return } | ^^ ^^ | note: the lint level is defined here --> a.rs:2:8 | 2 | #[warn(unused_braces)] | ^^^^^^^^^^^^^ help: remove these braces | 5 - if return return { return } else { return } 5 + if return return return else { return } | error: aborting due to 1 previous error; 1 warning emitted 

rustc 1.89.0-nightly (1bbd62e54 2025-05-29) binary: rustc commit-hash: 1bbd62e547ba5cc08ccb44c27def3d33195d2dd5 commit-date: 2025-05-29 host: x86_64-unknown-linux-gnu release: 1.89.0-nightly LLVM version: 20.1.5