error: unexpected `impl` keyword
  --> $DIR/extra-impl-in-trait-impl.rs:6:18
   |
LL | impl<T: Default> impl Default for S<T> {
   |                  ^^^^^ help: remove the extra `impl`
   |
note: this is parsed as an `impl Trait` type, but a trait is expected at this position
  --> $DIR/extra-impl-in-trait-impl.rs:6:18
   |
LL | impl<T: Default> impl Default for S<T> {
   |                  ^^^^^^^^^^^^

error: unexpected `impl` keyword
  --> $DIR/extra-impl-in-trait-impl.rs:12:6
   |
LL | impl impl Default for S2 {
   |      ^^^^^ help: remove the extra `impl`
   |
note: this is parsed as an `impl Trait` type, but a trait is expected at this position
  --> $DIR/extra-impl-in-trait-impl.rs:12:6
   |
LL | impl impl Default for S2 {
   |      ^^^^^^^^^^^^

error: aborting due to 2 previous errors