Boost Spirit 1.63 "Char >> (Literal | Sequence)" Bug

#include <boost/spirit/include/qi.hpp>

#include <cstdlib>
#include <iostream>
#include <string>

int main(int argc, char * argv[]) {
    namespace qi = boost::spirit::qi;
    const std::string input("xabc");

    char x = 0;
    char a = 0;
    char b = 0;
    char c = 0;

    const int result = qi::parse(
        input.begin(),
        input.end(),
            qi::char_ >> (qi::lit("Z") | (qi::char_ >> qi::char_ >> qi::char_)),
            x, a, b, c
    );

    std::cout << (result ? "Success" : "Failure") << ": "
        << '"' << x << "\" \"" << a << "\" \""  << b << "\" \"" << c << '"' << std::endl;
    return result ? EXIT_SUCCESS : EXIT_FAILURE;
}