error[E0743]: C-variadic type `...` may not be nested inside another type
  --> $DIR/variadic-ffi-nested-syntactic-fail.rs:1:25
   |
LL | fn f1<'a>(x: u8, y: &'a ...) {}
   |                         ^^^

error[E0743]: C-variadic type `...` may not be nested inside another type
  --> $DIR/variadic-ffi-nested-syntactic-fail.rs:4:29
   |
LL | fn f2<'a>(x: u8, y: Vec<&'a ...>) {}
   |                             ^^^

error[E0308]: mismatched types
  --> $DIR/variadic-ffi-nested-syntactic-fail.rs:8:33
   |
LL |     let _recovery_witness: () = 0;
   |                            --   ^ expected `()`, found integer
   |                            |
   |                            expected due to this

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0308, E0743.
For more information about an error, try `rustc --explain E0308`.