[Bug c++/127316] [reflection] ICE redeclaring a function whose return type involves a reflection of a parameter variable

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127316

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Maybe compare_reflections should use DECL_ORIGIN when comparing PARM_DECLs. 
That seems to fix this.  Needs more testing though.