[Bug c++/120275] [12/13/14/15/16 Regression] ICE in write_type at cp/mangle.cc:2687 when using decltype(auto) with initializer list since 11.3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120275

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 61453
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61453&action=edit
Reduced testcase