Multiple up() terms read components from different parents

#include "flecs.h"
#include <cstdio>

struct Child { int Value = 0; };
struct A { int Value = 0; };
struct B { int Value = 0; };

int main()
{
    flecs::world world;
    bool passed = true;
    int count = 0;

    world.system<const Child, const A, const B>()
        .term_at(1).up(flecs::ChildOf)
        .term_at(2).up(flecs::ChildOf)
        .each([&](flecs::entity e, const Child&, const A& a, const B& b) {
            ++count;
            std::printf("%s: A=%d, B=%d\n",
                e.name().c_str(), a.Value, b.Value);
            passed &= a.Value == e.parent().get<A>().Value
                   && b.Value == e.parent().get<B>().Value;
        });

    auto p1 = world.entity().set<A>({1}).set<B>({10});
    auto p2 = world.entity().set<A>({2}).set<B>({20});
    world.entity(flecs::Parent{p1.id()}, "FirstChild").set<Child>({});
    world.entity(flecs::Parent{p2.id()}, "SecondChild").set<Child>({});

    world.progress(0.001f);
    return passed && count == 2 ? 0 : 1;
}