[Bug libstdc++/68515] std::result_of doesn't work when F is abstract (with pure virtual functions)

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68515

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |jwakely.gcc at gmail dot com
          Component|c++                         |libstdc++

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Jon can you have a look?