[Bug c++/128547] GCC rejects valid program when passing empty braces to function template parameter with reference type

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128547

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Hmm:
https://eel.is/c++draft/temp.deduct.call



So it looks like GCC is deducing the array as 0 and rejecting it.  But then not
using the default template argument there.

Maybe there is a defect report in this area.