[Bug c++/43113] too long diagnostics in some cases of recursive template instantiation

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43113

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
For the original case in comment #0 we get in GCC 5+:
<source>: In instantiation of 'struct A<A<A<A<A<B>::S>::S>::S>::S>':
<source>:5:11:   recursively required from 'struct A<A<B>::S>'
<source>:5:11:   required from 'struct A<B>'
<source>:8:12:   required from here
<source>:5:11: fatal error: template instantiation depth exceeds maximum of 5
(use -ftemplate-depth= to increase the maximum)
   A < S > ht;
           ^