'identifier' : defined but not declared
The specified destructor was defined, but not declared in the class body. A compiler-generated destructor is used if a destructor declaration is not in the class body.
The following is an example of this error:
class C
{
C(); // only a constructor is declared
};
C::C() {} // OK, constructor is defined
C::~C() // undeclared destructor definition
{ // error on this line
}