error[E0425]: cannot find function `f` in this scope
  --> $DIR/break-token-spans.rs:13:5
   |
LL |     f :: < Vec < _ > > ( ) ;
   |     ^ not found in this scope

error[E0308]: mismatched types
  --> $DIR/break-token-spans.rs:14:32
   |
LL |     let a: Option<Option<u8>>= true;
   |            ------------------  ^^^^ expected enum `Option`, found `bool`
   |            |
   |            expected due to this
   |
   = note: expected enum `Option<Option<u8>>`
              found type `bool`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0308, E0425.
For more information about an error, try `rustc --explain E0308`.