[Bug c++/120149] ICE in GCC when deducing return type with nested lambdas using accumulate with -std=c++20

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120149

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 61361
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61361&action=edit
Reduced testcase