error[E0308]: mismatched types --> $DIR/name-clash-nullary.rs:2:7 | LL | let None: isize = 42; | ^^^^ ----- expected due to this | | | expected `isize`, found enum `Option` | = note: expected type `isize` found enum `Option<_>` error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.