1 error[E0308]: mismatched types
2 --> $DIR/tag-that-dare-not-speak-its-name.rs:22:20
4 LL | let x : char = last(y);
5 | ^^^^^^^ expected char, found enum `std::option::Option`
7 = note: expected type `char`
8 found type `std::option::Option<_>`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.