[Bug c++/125759] [reflection] ICE on reflection of reference pack

[kengusername at proton dot me]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125759

--- Comment #1 from keng <kengusername at proton dot me> ---
NOTE: this doesn't fail on gcc 16.1, 
godbolt: https://godbolt.org/z/TaT8377b1