Return array - TypeError: Cannot read property 'type' of undefined

[gpersoon]

I found another edge case with the following contract:

pragma solidity >=0.4.0 <0.7.0;
contract Test {
  uint[] aa=[1,2,3,4];
   function GetStorage() public view returns(uint[] memory) {
       return aa;
   }
}

Calling the function GetStorage results in the following error:

bundle.js:49678 Uncaught (in promise) TypeError: Cannot read property 'type' of undefined
    at getTypes (bundle.js:49678)
    at bundle.js:49661
    at Array.map (<anonymous>)
    at decodeReturnData (bundle.js:49661)
    at getReturnData (bundle.js:50058)
    at makeReturn (bundle.js:50050)
    at sendTx (bundle.js:50485)

[gpersoon]

An other variation of the same issue:

pragma solidity >=0.4.0 <0.7.0;
contract Test {
      address[] aa = [address(0x1),address(0x2)];
      function Check() external view returns (address [] memory)  {
        return aa;
    }
}