error: Missing `Block` generic parameter.
  --> $DIR/missing_block_generic_parameter.rs:18:13
   |
18 |     impl self::Api for Runtime {
   |                ^^^

error[E0107]: wrong number of type arguments: expected 1, found 0
  --> $DIR/missing_block_generic_parameter.rs:18:7
   |
18 |     impl self::Api for Runtime {
   |          ^^^^^^^^^ expected 1 type argument
