QVariantList lessThan operator via QVariant is broken

#include <QVariantList>
#include <cassert>

int main() {
     QVariantList l0;
     QVariantList l1;
     l0 << 1 << 2;
     l1 << 1 << 3;

     // this works as expected
     assert((l0 == l1) == (l1 == l0));
     assert((l0 < l1) != (l1 < l0));
     assert((l0 > l1) != (l1 > l0));

     // here things get interesting
     QVariant v0(l0);
     QVariant v1(l1);
     assert((v0 == v1) == (v1 == v0));
     assert((v0 < v1) != (v1 < v0));  //< assert!
     assert((v0 > v1) != (v1 > v0));  //< assert!

    return 0;
}