ABIEncoderV2 public functions with struct containing multiple members of the same struct type

[naddison36]

ABI encoder version 2 does not support public functions with a struct containing multiple members of the same struct type. For example, the below code fails with error TestContract.sol:18:28: TypeError: Internal or recursive type is not allowed for public or external functions.

pragma solidity 0.4.19;
pragma experimental ABIEncoderV2;

contract TestContract
{
    struct SubStruct {
        uint256 id;
        string description;
    }

    struct TestStruct {
        SubStruct subStruct1;
        SubStruct subStruct2;
    }

    TestStruct[] internal tests;

    function addTestStruct(TestStruct testStruct) public
    {
        tests.push(testStruct);
    }
}

If I remove line 13 SubStruct subStruct2; the code does compile using Solidity the 0.4.19 compiler.

The code will also compile if I change line 18 to be internal instead of public function addTestStruct(TestStruct testStruct) internal

My workaround is to declare a second SubStruct

pragma solidity 0.4.19;
pragma experimental ABIEncoderV2;

contract TestContract
{
    struct SubStruct {
        uint256 id;
        string description;
    }

    struct SubStruct2 {
        uint256 id;
        string description;
    }

    struct TestStruct {
        SubStruct subStruct1;
        SubStruct2 subStruct2;
    }

    TestStruct[] internal tests;

    function addTestStruct(TestStruct testStruct) public
    {
        tests.push(testStruct);
    }
}

[riordant]

Have the exact same issue.

[attente]

It also occurs if the same struct is embedded multiple times indirectly through composition:

pragma solidity ^0.4.19;
pragma experimental ABIEncoderV2;

contract A {
  struct T {
    U u;
    V v;
  }

  struct U {
    W w;
  }

  struct V {
    W w;
  }

  struct W {
    int x;
  }

  function f(T t) public pure {
  }
}