[Bug c++/104008] [11/12 Regression] New g++ folly compile error with gcc 11.x. Bisected to PR99445 c++: Alias template in pack expansion

[ahornby at fb dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104008

--- Comment #4 from Alex Hornby <ahornby at fb dot com> ---
Created attachment 52357
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52357&action=edit
preprocessed source from gcc 11.2.1 produced at same time as gcc 10.3.0
preprocessed source

captured at the same system state as the 10.3.0 pre-processed source from my
Fedora 35 system