False Positive, syntax Error

[Raphael Baier]

Minimal example:

#include <type_traits>

template<typename derived_type, typename base_type>
using inherits_from = typename std::enable_if<
    std::is_base_of<base_type, derived_type>::value, int>::type;


template <class T>
struct Foo {};

struct Bar : Foo<Bar> {};

template <typename T, inherits_from<T,Foo<T>> = 0>
void baz(T t){}

int main()
{
    baz(Bar{});
}

generates:

../source.cpp:15:1: error: syntax error [syntaxError]
template <typename T,inherits_from<T,Foo<T>> = 0>
^

but the code compiles just fine, the thing that seems to hickup here is the Foo<T> inside the inherits_from
it also seems that only versions above 1.82 are affected
when not using Foo<T> or when the code is changed to

template <typename T, typename = inherits_from<T,Foo<T>>>

the error does not occur

[CHR]

This does not reproduce with v2.3.