error[E0308]: mismatched types --> $DIR/issue-13428.rs:3:13 | LL | fn foo() -> String { | --- ^^^^^^ expected `String`, found `()` | | | implicitly returns `()` as its body has no tail or `return` expression error[E0308]: mismatched types --> $DIR/issue-13428.rs:11:13 | LL | fn bar() -> String { | --- ^^^^^^ expected `String`, found `()` | | | implicitly returns `()` as its body has no tail or `return` expression LL | "foobar".to_string() LL | ; | - help: remove this semicolon to return this value error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0308`.