[Bug c++/64446] Misleading error message when inheriting from a template class w/o the template params

[petschy at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64446

--- Comment #1 from petschy at gmail dot com ---
One subtlety:

template<typename T=void>
struct Base3
{
};
struct Foo3 : Base3 
{
};

In this case complaining about missing template params is probably
inappropriate, since Base3<> is perfectly valid.

So on second thought, the error should be about the missing <> after the class
name.