solidity/test/libsolidity/syntaxTests/nameAndTypeResolution/039_functions_with_identical_structs_in_interface.sol

pragma experimental ABIEncoderV2;

contract C {
    struct S1 { int i; }
    struct S2 { int i; }
    function f(S1 memory) public pure {}
    function f(S2 memory) public pure {}
}
// ----
// TypeError: (143-179): Function overload clash during conversion to external types for arguments.