I could not figure out exactly what is causing this error since generated errors are not pointing to the libcxx/include/experimental/meta file but to generated meta header
Sorry about that - forgot to wrap in LIFT(x) instead of ^^x, so it works for both ^x and ^^x. Adding -freflection-latest will work around this for today; should be fixed tomorrow.
master is broken: https://godbolt.org/z/dznddM8hc
commit that broke it: https://github.com/bloomberg/clang-p2996/commit/5a5e1a48f55d34ac669e3a08235c66bd39fcc046
I could not figure out exactly what is causing this error since generated errors are not pointing to the libcxx/include/experimental/meta file but to generated meta header