[Bug c++/71834] [5/6/7 Regression] accepts invalid C++11 code with too few number of template arguments for class template

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71834

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.9.3

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Older versions rejected it for different reasons:

g++4.8.5 -std=c++11 v.cc 
v.cc:3:42: error: parameter pack ‘<anonymous>’ must be at the end of the
template parameter list
   template < Ts ..., typename U > struct B {};
                                          ^
v.cc:7:1: error: ‘B’ in ‘struct A<int>’ does not name a type
 A < int >::B < 0 > e;
 ^


g++-4.9.3 -std=c++11 v.cc

v.cc:7:21: error: invalid type in declaration before ‘;’ token
 A < int >::B < 0 > e;
                     ^

Neither of those is a very useful diagnostic.