Box2D weird behavior with std::vector - c++

Question

lately I started playing with box2d and tried abstracting it to class
RigidBody::RigidBody() {
}
RigidBody::RigidBody(const RigidBody& other) {
m_fixture = other.m_fixture;
b2BodyDef bodyDef;
bodyDef.position = other.m_body->GetPosition();
bodyDef.type = other.m_body->GetType();
m_body = Runtime::PhysicsWorld.CreateBody(&bodyDef);
b2FixtureDef fixtureDef;
fixtureDef.shape = m_fixture->GetShape();
fixtureDef.density = m_fixture->GetDensity();
fixtureDef.friction = m_fixture->GetFriction();
fixtureDef.restitution = m_fixture->GetRestitution();
fixtureDef.restitutionThreshold = m_fixture->GetRestitutionThreshold();
m_fixture = m_body->CreateFixture(&fixtureDef);
}
RigidBody::RigidBody(sf::Vector2f pos, BodyType type) {
pos /= Constants::PPM;
b2BodyDef bodyDef;
bodyDef.position = pos;
bodyDef.type = (b2BodyType)type;
m_body = Runtime::PhysicsWorld.CreateBody(&bodyDef);
sf::Vector2f size(50.0f, 50.0f);
size /= 2.0f;
size /= Constants::PPM;
b2PolygonShape shape;
shape.SetAsBox(size.x, size.y);
b2FixtureDef fixtureDef;
fixtureDef.shape = &shape;
fixtureDef.density = 1.0f;
fixtureDef.friction = 0.5f;
fixtureDef.restitution = 0.0f;
fixtureDef.restitutionThreshold = 0.5f;
m_body->CreateFixture(&fixtureDef);
}
RigidBody::~RigidBody() {
Runtime::PhysicsWorld.DestroyBody(m_body);
}
but vector is behaving really weird with it i know it's probably becasue of copy constructor or destructor but I can't figure this out
std::vector<hv::RigidBody> m_Bodies;
the problem is with vector erase when I call m_Bodies.erase(m_Bodies.begin()) for some reason it deletes the last objects
m_Bodies.erase(m_Bodies.begin());
And after I call m_Bodies.erase(m_Bodies.begin()) second time I get this
Also it doesn't matter how many objects is in vector if I call m_Bodies.erase(m_Bodies.begin() + 3) it will always delete the last one
*edit corrected question

Answer 1

The problem was I didn't define operator =
resolved it by
RigidBody* RigidBody::operator=(const RigidBody& other) {
if(m_body)
Runtime::PhysicsWorld.DestroyBody(m_body);
m_fixture = other.m_fixture;
b2BodyDef bodyDef;
bodyDef.position = other.m_body->GetPosition();
bodyDef.type = other.m_body->GetType();
m_body = Runtime::PhysicsWorld.CreateBody(&bodyDef);
b2FixtureDef fixtureDef;
fixtureDef.shape = m_fixture->GetShape();
fixtureDef.density = m_fixture->GetDensity();
fixtureDef.friction = m_fixture->GetFriction();
fixtureDef.restitution = m_fixture->GetRestitution();
fixtureDef.restitutionThreshold = m_fixture->GetRestitutionThreshold();
m_fixture = m_body->CreateFixture(&fixtureDef);
return this;
}