[Bug c++/95725] Confusing error diagnostic in an invalid template

[haoxintu at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95725

--- Comment #7 from Haoxin Tu <haoxintu at gmail dot com> ---
By the way, can you take a look at bug 95597 and bug 95659? I think GCC should
accept the first case and shouldn't miss the error message in the second code. 
Those cases are different from this report.