[Bug c++/85118] [6/7/8 Regression] Error when using std::bind with a generic lambda - "cannot bind 'const volatile char&' to an rvalue of type 'const volatile char'"

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85118

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ugh, this again. I've battled with this when working on the implementation of
std::bind. I'll try to reduce it to something independent of the library
headers.