Hi, tx for making this library!
I am making a C++ -> Lua bridge from a set of C++ classes I already wrote, and so I did some documentation reading, and found a typo
It's over here,

https://sol2.readthedocs.io/en/latest/api/usertype.html#usertype-inheritance

in the statement,

                   ______________ over there B should be A
                 /
lua.new_usertype<B>( "A",
	"call", &A::call
    );

Ok, that was it.
Tx!

Ondrej

#define SOL_ALL_SAFETIES_ON 1
#include <sol/sol.hpp>

struct A {
int a = 10;
virtual int call() { return 0; }
virtual ~A(){}
};
struct B : A {
int b = 11;
virtual int call() override { return 20; }
};

int main (int, char*[]) {

sol::state lua;
                    ______________ over there B should be A
                  /
lua.new_usertype<B>( "A",
	"call", &A::call
);

lua.new_usertype<B>( "B",
	"call", &B::call,
	sol::base_classes, sol::bases<A>()
);

return 0;

}