ICE in solidity::frontend::TypeChecker::visit, Cannot declare variable with void (empty tuple) type.

[Changochen]

Description

Consider the following POC:

contract C {
    function f ( ) public {
        var i = ( ( 1 ( 3 ) + address ) , 2 ) ** 3 ;
    }
}

Run with solc --bin -o poc poc.sol and we got

Internal compiler error during compilation:
/home/yongheng/solidity_clean/libsolidity/analysis/TypeChecker.cpp(1118): Throw in function virtual bool solidity::frontend::TypeChecker::visit(const solidity::frontend::VariableDeclarationStatement &)
Dynamic exception type: boost::wrapexcept<solidity::langutil::InternalCompilerError>
std::exception::what: Cannot declare variable with void (empty tuple) type.
[solidity::util::tag_comment*] = Cannot declare variable with void (empty tuple) type.

Environment

• Compiler version: Version: 0.6.3-develop.2020.2.10+commit.d033c2f7.Linux.clang
• Target EVM version (as per compiler settings):
• Framework/IDE (e.g. Truffle or Remix):
• EVM execution environment / backend / blockchain client:
• Operating system: Ubuntu 16