[Bug c++/85569] is_invocable(F, decltype(objs)...) fails with "not supported by dump_expr#" unless via indirection

[gccbugbjorn at fahller dot se]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85569

--- Comment #1 from Björn Fahller <gccbugbjorn at fahller dot se> ---
Created attachment 44038
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44038&action=edit
Test program exposing the bug