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I have a problem while working with vectors of a class. I have tried whittling away at the code as much as possible, leaving me with the code below. Yet, after doing this, I still cannot figure out why my program is crashing. I come from a world of VBA and my C++ debugging skills are poor to say the least and I apologize for that up front. Any guidance to improve my ability here will be gladly accepted. My class: class Tester { public: int varA; int varB; Tester() { varA = 1; varB = 1; } Tester(Tester& P1, Tester& P2) { varA = P1.varA + P2.varA; varB = P1.varB + P2.varB; } Tester(const Tester &Source) { varA = Source.varA; varB = Source.varB; } }; My test mains: Does not work: int main() { std::vector < Tester > BreakIt; for (int i = 0; i < 2500; i++) { Tester newTester; BreakIt.push_back(newTester); Tester& tempTester = BreakIt.at(0); for (int j = 0; j < 4; j++) { BreakIt.push_back(Tester(newTester, tempTester)); //This is where it crashes. } } return 0; } Does work: int main() { std::vector < Tester > BreakIt; Tester newTester; BreakIt.push_back(newTester); for (int i = 0; i < 2500; i++) { Tester& tempTester = BreakIt.at(0); for (int j = 0; j < 4; j++) { BreakIt.push_back(Tester(newTester, tempTester)); } } return 0; } Does work: int main() { std::vector < Tester > BreakIt; for (int i = 0; i < 2500; i++) { Tester newTester; BreakIt.push_back(newTester); Tester& tempTester = BreakIt.at(0); } return 0; } The push_back() line that breaks does run a few times before t

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