[Bug c++/57470] New: Wrong line number in diagnostic message

["ai.azuma at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57470

            Bug ID: 57470
           Summary: Wrong line number in diagnostic message
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ai.azuma at gmail dot com

Created attachment 30225
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30225&action=edit
Output of -v option and preprocessed source with GCC 4.9.0 20130526

GCC 4.8.1 20130523 and 4.9.0 20130526 reject the following invalid code as
expected. However, the diagnostic message is not good.

//----------------------------------------
template<typename>
struct Incomplete;

template<typename T, T...>
struct S
{
  static_assert(Incomplete<T>::value, "");
};

S<char> s;
//----------------------------------------

For the above code, 4.9.0 20130526 says;

main.cpp: In instantiation of 'struct S<char>':
main.cpp:10:9:   required from here
main.cpp:6:1: error: incomplete type 'Incomplete<char>' used in nested name
specifier
 {
 ^

GCC should point to line 7, not line 6. GCC 4.7.4 20130525 does not show a
caret but points to the wrong line number (line 6), too.