[Bug c++/59759] internal compiler error: in unify, using std::enable_if on classes

[gereon.kremer at cs dot rwth-aachen.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59759

--- Comment #3 from Gereon Kremer <gereon.kremer at cs dot rwth-aachen.de> ---
(In reply to Marek Polacek from comment #2)
> I'd say a dup of PR59115.

I checked the following code from PR59115 that should also trigger this bug:

template<typename T, float = 0, int = 0, typename U = int> void foo(T, U) {}
void bar()
{
  foo(0, 0);
}

This does not trigger an ICE for me, but produces the following, hence it does
not seem like a duplicate to me...

Test_GCC.cpp:15:30: error: ‘float’ is not a valid type for a template non-type
parameter
 template<typename T, float = 0, int = 0, typename U = int> void foo(T, U) {}
                              ^
Test_GCC.cpp:19: confused by earlier errors, bailing out