List iterator outside range - c++

Question

I have a problem with the STL list class. I have a base class called Contact, and three derived classes, Friend, Colleague and Acquaintance. Each instance of the derived classes has certain fields which I modify in the fill*Class*Details() function. The problem is that when it reaches the push_back line, my program gives me an error saying list insert iterator outside range. What can that be from?
void Agenda::pushContact(string line, string temp)//function that adds a contact of type temp, containing the fields from line to the list
{
Contact *c;
if(temp=="friend") //the contact to add is of type friend
{
c = new Friend();
fillFriendDetails(c,line);//the details of Friend c will be filled
}
else if(temp=="colleague")
{
c = new Colleague();
fillColleagueDetails(c,line);//the details of Colleague c will be filled
}
else if(temp=="acquaintance")
{
c = new Acquaintance();
fillAcquaintanceDetails(c,line);//the details of Acquaintance c will be filled
}
contactList.push_back(c);
}
Also, the contactList is defined as list <Contact*> contactList;.
Edit: This is how the Contact class (+derived classes) are defined:
class Contact
{
public:
string getFullName() { string fullName;fullName.append(firstName); fullName.append(" ");fullName.append(lastName); return fullName;}
public:
void setFullName(string newFirstName, string newLastName) { firstName = newFirstName; lastName = newLastName;}
public:
string getFirstName() { return firstName;}
public:
void setFirstName(string newFirstName) {firstName = newFirstName;}
public:
string getLastName(){return lastName;}
public:
void setLastName(string newLastName){lastName = newLastName;}
public:
string getPhoneNo(){return phoneNo;}
public:
void setPhoneNo(string newPhoneNo) {phoneNo = newPhoneNo;}
public:
void setType(string newType){type=newType;}
public:
string getType(){return type;}
private:
string firstName;
string lastName;
string phoneNo;
string type;
//SubClass setters and getters
public:
virtual void setDateOfBirth(string birth) {}
virtual string getDateOfBirth() {return 0;}
virtual void setCity (string newCity) {}
virtual string getCity() {return 0;}
virtual void setFaculty (string newFaculty) {}
virtual string getFaculty() {return 0;}
virtual void setGroup (string newGroup) {}
virtual string getGroup() {return 0;}
virtual void setJob (string newJob) {}
virtual string getJob () {return 0;}
};
class Friend : public Contact
{
public:
void setDateOfBirth(string birth) {dateOfBirth=birth;}
public:
string getDateOfBirth() {return dateOfBirth;}
public:
void setCity (string newCity){city=newCity;}
public:
string getCity(){return city;}
private:
string dateOfBirth;
string city; //current city of residence
};
class Colleague : public Contact
{
public:
void setFaculty (string newFaculty){faculty = newFaculty;}
public:
string getFaculty(){return faculty;}
public:
void setGroup (string newGroup){group = newGroup;}
public:
string getGroup(){return group;}
private:
string faculty;
string group;
};
class Acquaintance : public Contact
{
public:
void setJob (string newJob){job=newJob;}
public:
string getJob (){return job;}
private:
string job;
};

Answer 1

It looks like the list is being mismanaged at a different point in the code, because the error implies end is incorrect. Most likely either the list is deleted/out of scope or some incorrect erases were performed on the list elements (say using invalid iterators).