free(): invalid pointer using shared_ptr to a class with a static member and const member

Having three classes

class A {
public:
    virtual const std::string Foo1 () const = 0;
    virtual void Foo2 (int direction, std::shared_ptr<A> aPtr) = 0;
    A(const std::string & name): objName(name) {}
    vitrual ~A() {}

private:
    const std::string objName;
    std::unordered_map<int, std::shared_ptr<A>> neighbours;
}

class B: public A {
public:
    void Foo2 (int direction, std::shared_ptr<A> aPtr) override {
        if (direction > 3){
            throw std::invalid_argument("...");
        }
        this->neighbours.insert(std::make_pair(direction, aPtr));
    }
}

class C: public B {
public:
    const std::string Foo1 () const override {
        return desc;
    }

private:
    const static std::string desc; // Value has been set in cpp file
}

running this code in a test below

C c("test");
CPPUNIT_ASSERT_THROW(c.Foo2(0, std::make_shared<B>()), std::invalid_argument);

causing free(): invalid pointer: 0x00000000017ccc88 *** error. When I run the code in valgrind it shows that the cause of error is in the A constructor: with this message: 88 bytes in 1 blocks are definitely lost in loss record 1 of 6
What is the problem? Can I have not const member variables with shared_ptr or am I passing my shared_ptr wrong?