error[E0106]: missing lifetime specifier
  --> $DIR/missing_lifetime.rs:18:12
   |
LL |     Other2(AstKind),
   |            ^^^^^^^ expected named lifetime parameter
   |
help: consider introducing a named lifetime parameter
   |
LL ~ enum Other<'a> {
LL |     Other1(Foo),
LL ~     Other2(AstKind<'a>),
   |

error[E0392]: lifetime parameter `'ast` is never used
  --> $DIR/missing_lifetime.rs:6:14
   |
LL | enum AstKind<'ast> {
   |              ^^^^ unused lifetime parameter
   |
   = help: consider removing `'ast`, referring to it in a field, or using a marker such as `PhantomData`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0106, E0392.
For more information about an error, try `rustc --explain E0106`.