[Bug c++/118398] Resolving lambda expression decltype prioritized over the option to consider failed required concept using that type as argument

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118398

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
lambda are not considered an immediate context which is why func1 fails for GCC
and clang.

Also unused template arguments for concepts are not taken into account so in
this cases the lambdas for C2 are ignored. This is why GCC works (clang has a
bug in this area; let me find that issue).