[Bug c++/96516] template + __attribute__((copy)) produce compiler errors

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96516

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thank you for taking the time to put together all the test cases and reporting
the problem, by the way!