1 error[E0308]: mismatched types
2 --> $DIR/issue-6458-4.rs:1:20
4 LL | fn foo(b: bool) -> Result<bool,String> {
5 | --- ^^^^^^^^^^^^^^^^^^^ expected enum `std::result::Result`, found ()
7 | this function's body doesn't return
8 LL | Err("bar".to_string());
9 | - help: consider removing this semicolon
11 = note: expected type `std::result::Result<bool, std::string::String>`
14 error: aborting due to previous error
16 For more information about this error, try `rustc --explain E0308`.