[Bug c++/64603] [5 Regression] bogus error "no matching function for call to ..." with templates

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64603

--- Comment #2 from janus at gcc dot gnu.org ---
Further reduced test case:


template <int i> constexpr int find_longest_name()
{
  return sizeof("Main") - 1;
}

template <int i, int l = find_longest_name<i>()> void create_all_loggers()
{}

int main()
{
  create_all_loggers<1>();
}


$ g++-5.0 logging.cc -std=c++11
logging.cc: In function ‘int main()’:
logging.cc:11:25: error: no matching function for call to
‘create_all_loggers()’
   create_all_loggers<1>();
                         ^
logging.cc:6:55: note: candidate: template<int i, int l> void
create_all_loggers()
 template <int i, int l = find_longest_name<i>()> void create_all_loggers()
                                                       ^
logging.cc:6:55: note:   template argument deduction/substitution failed:
logging.cc:6: confused by earlier errors, bailing out