error: `let` expressions are not supported here --> $DIR/ast-validate-guards.rs:5:20 | LL | Ok(opt) if let Some(4) = opt || false => {} | ^^^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions --> $DIR/ast-validate-guards.rs:5:38 | LL | Ok(opt) if let Some(4) = opt || false => {} | ^^ error: module cannot be declared unsafe --> $DIR/ast-validate-guards.rs:15:17 | LL | unsafe mod a {}; | ^^^^^^ error: aborting due to 2 previous errors