Crash when initializing vector with one element using brace initialization in VS2019

The following code crashes deep inside the standard library:

#include <set>
#include <vector>

struct Parent
{
    std::set<int> v;
};

struct Child : public Parent
{
    Child() = default;
};

int main()
{
    std::vector<Child> v{ {} };
}

but if the constructor is explicitly declared (without = default), it doesn't crash. I don't understand why. I'm using VS2019.