C++ :: Multiple Constructors Calling Parent Constructor

I have a class that extends another class, and I want multiple constructors in the child class, but the child constructor needs to call the parent constructor. This is what I have

In the child class:

ChildClass::ChildClass() {
ChildClass(1);
}
ChildClass::ChildClass(int i)
: ParentClass(i) {
// do stuff
}

In the parent class:

ParentClass::ParentClass(int i) {
// do stuff
}

In my main program:

ChildClass child1;
// do stuff with child1
// breaks
ChildClass child2(1);
// do stuff with child2
// works fine

Using the default constructor breaks my program at runtime, but using the one with a parameter works fine. The default constructor calls the other with the same thing as the main part in the program, so I would think this should make no difference, but obviously that isn't the case.