solidity/test/libsolidity/syntaxTests/types/encoding_fractional_abiencoderv2.sol

pragma experimental ABIEncoderV2;
contract C {
   function f1() public pure returns (bytes memory) {
       return abi.encode(0.1, 1);
   }
}
// ----
// TypeError 6090: (126-129): Fractional numbers cannot yet be encoded.