[Bug c++/68784] deductible parameter type still requires explicit reference cast, e.g., std::thread

[ville.voutilainen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68784

--- Comment #5 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
And to add insult to injury, msvc accepts binding lvalue reference to
temporaries, and chances are that their thread constructor does what it does
partly because of that non-conforming core language extension.