[ICE]: Type error in error statement.

[Subway2023]

contract C {
    enum EnumType {A, B, C}

    struct StructType {
        uint x;
    }
    error E(EnumType StructType, StructType test);
}

solar --version: 0.1.1
solc can compile successfully, but solar throws an error. If I change EnumType StructType to EnumType otherName, the error does not occur.

error: name has to refer to a valid user-defined type
 --> getSeed/seed/error_param_type_shadowed_by_param_name.sol:7:34
  |
7 |     error E(EnumType StructType, StructType test);
  |                                  ^^^^^^^^^^
  |