Crt detected that the application wrote to memory after end of heap buffer

#include <iostream>
 
using namespace std;
 
class Vector {
private:
    int size;
    double *vector;
public:
    Vector() {
        size = 0;
        vector = nullptr;
    }
 
    Vector(double *arrayInput, int sizeInput) {
        size = sizeInput;
        vector = new double[size];
        for (double *vectorPtr = vector, *arrayInputPtr = arrayInput; vectorPtr < vector + size; ++vectorPtr, ++arrayInputPtr) {
            *vectorPtr = *arrayInputPtr;
        }
    }
 
    ~Vector() {
        delete[] vector;
    }
 
    friend ostream &operator <<(ostream &output, const Vector &obj);
 
    double& operator [](int index) {
        if (index >= size) {
            cout << "Error: wrong index!" << endl;
            system("pause");
            exit(EXIT_FAILURE);
        }
        else {
            return vector[index];
        }
    }
 
    
 
    void operator -=(double value) {
        int oldSize = size;
        for (double *vectorPtr = vector; vectorPtr < vector + size; ++vectorPtr) {
            if (*vectorPtr == value) {
                --size;
            }
        }
        if (oldSize == size) {
            return;
        }
        else {
            double *tmpVector = vector;
            vector = new double[size];
            int iterator = 0;
            for (double *tmpVectorPtr = tmpVector; tmpVectorPtr < tmpVector + oldSize; ++tmpVectorPtr) {
                vector[iterator++] = *tmpVectorPtr;
            }
            delete[] tmpVector;
        }
    }
};
 
ostream &operator <<(ostream &output, const Vector &obj) {
    for (double *vectorPtr = obj.vector; vectorPtr < obj.vector + obj.size; ++vectorPtr) {
        output << *vectorPtr << " ";
    }
 
    return output;
}
 
int main() {
    double *arr2 = new double[5]{ 7,7,7,7,7 };
    Vector MyVector2 = Vector(arr2, 5);
    MyVector2 -= 3.7;
    cout << MyVector2 << endl;
    system("pause");
    return 0;
}