[Bug c++/69060] New: Invalid 'cannot bind lvalue to rvalue' error

[ldionne.2 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69060

            Bug ID: 69060
           Summary: Invalid 'cannot bind lvalue to rvalue' error
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ldionne.2 at gmail dot com
  Target Milestone: ---

The following code does not compile on GCC trunk (g++ 6.0.0 20151226
experimental):

    template <typename T>
    struct hold {
        T value;
        T&& operator()() && {
            return static_cast<T&&>(value);
        }
    };

    bool result = hold<bool&&>{true}();


The error is 

[snip]/bin/g++ -pedantic -std=c++1y -W -Wall -Wextra -c ../test/worksheet.cpp
../test/worksheet.cpp: In instantiation of ‘T&& hold<T>::operator()() && [with
T = bool&&]’:
../test/worksheet.cpp:1209:34:   required from here
../test/worksheet.cpp:1205:38: error: cannot bind ‘bool’ lvalue to ‘bool&&’
         return static_cast<T&&>(value);
                                      ^


Live example: http://melpon.org/wandbox/permlink/m9qGlrfGJLm218uh