1 error[E0308]: mismatched types
2 --> $DIR/while-type-error.rs:3:19
4 LL | fn main() { while main { } }
5 | ^^^^ expected bool, found fn item
7 = note: expected type `bool`
8 found type `fn() {main}`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.