[Bug c++/102449] New: template parameter with default argument is used without being verified during explicit specialization

[nickhuang99 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102449

            Bug ID: 102449
           Summary: template parameter with default argument is used
                    without being verified during explicit specialization
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nickhuang99 at hotmail dot com
  Target Milestone: ---

The following snippet code should be rejected because "First" should be checked
with its default argument which is "char"

template<class T,class First=char>
void foo(First,T){}
template<>
void foo<double>(int,double){}