[Bug c++/86943] [7/8/9 Regression] Wrong code when converting stateless generic lambda to function pointer

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86943

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See the glambda example in
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3649.html

Core 1937 seems relevant here.