[Bug c++/96251] [constexpr, coroutines] co_yield incorrectly rejected in non-explicitly-constexpr generic lambda

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96251

--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
patch posted :
https://gcc.gnu.org/pipermail/gcc-patches/2021-February/565649.html