Code example:
---------------8<-------------------
class class_a {
public:
    class_a(int a): _a(a){ }
    virtual ~class_a() { }
private: int _a;
};

int main(int argc, char** argv) {
    class_a a_obj2(1);
    return 0;
}
---------------8<-------------------
Steps:
- invoke Refactor->Change Function Parameters on class_a(int a) constructor.
- add new parameter
- refactor
Code becomes uncompilable.