Question

I’ve got a class called Task. The header file goes as such:

class Task
{
public:
    Task();
//Methods Declarations

private:

int uid;
list<Task> l;

    friend ostream & operator<<(ostream & os, const Task &t);
    friend ostream & operator<<(ostream & os, const list<Task *> &l);
};

Now in my main file, I run:

Task * tasks[7];
for (int i = 0; i != 7; ++i)
    tasks[i] = new Task();

delete [] *tasks;

upon running delete[] *tasks; I get the error message below:

Assignment 4(23901) malloc: *** error for object 0x1001009f8: pointer being 
                                freed was not allocated *** set a breakpoint in 
                                malloc_error_break to debug

As soon as I comment out list < Task *> l, and re-run it, the error message goes away. I tried changing list < Task * > l, to list < Task > l, but to no avail.

I can’t figure it out. Why would it error out, when list < Task > is allocated on the stack (well pointers to heap elements)? (STL management). Also tried vector<int>. I get the same thing.

UPDATE: delete tasks[i] didn’t do the trick.

Answer 1

You don’t use

delete [] *tasks;

but

for (int i = 0; i != 7; ++i)
    delete tasks[i];