[Bug c++/60920] New: Crash on double template header due to default template parameter

[a71104 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60920

            Bug ID: 60920
           Summary: Crash on double template header due to default
                    template parameter
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: a71104 at gmail dot com

```C++

template<int n, typename t = double>
struct x {};

template<typename t>
template<int n>
struct x<n> {};

int main() {
    x<10, double> x1;
    return 0;
}

```


It doesn't crash if I remove the default value `double` for the second template
argument, at the first line.