https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99699
--- Comment #1 from David Friberg <davveston at gmail dot com> --- This seems to have been fixed on trunk/GCC 12: https://wandbox.org/permlink/qq207mBL7q5ndRgS
[Bug c++/99699] Type deduction failure for deducing a non-type template parameter via another deducible structural type (class template specialization) non-type template parameter
davveston at gmail dot com via Gcc-bugs Thu, 07 Apr 2022 02:31:10 -0700
