[Bug c++/68071] Generic lambda variadic argument pack cannot be empty

["ralph.tandetzky at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68071

Ralph Tandetzky <ralph.tandetzky at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |ralph.tandetzky at gmail dot com

--- Comment #2 from Ralph Tandetzky <ralph.tandetzky at gmail dot com> ---
I can confirm that error. The code 

    int main(){
        [](auto...){}();
    }

leads to the following compile-time error:

    main.cpp: In function 'int main()':
    main.cpp:2:23: error: no match for call to '(main()::<lambda(auto:1, ...)>)
()'
             [](auto...){}();
                       ^
    main.cpp:2:19: note: candidate: template<class auto:1>
main()::<lambda(auto:1, ...)>
             [](auto...){}();
                   ^
    main.cpp:2:19: note:   template argument deduction/substitution failed:
    main.cpp:2:23: note:   candidate expects 1 argument, 0 provided
             [](auto...){}();
                       ^

This is the case for gcc 4.9 and gcc 5.2 with C++14 enabled. Clang 3.6 compiles
it.