delete array allocated in a function

[antonin07130]

Hello, I have a deallocation problem :
I have several classes, and in one of these, a function is returning an array of double :

double *funtion()
{
double *a = new double[4];
a[0] = 1.
a[1] = 1.
a[2] = 1.
a[3] = 1.

return a;
}

An other function is calling the first one and uses the created array :

void function2()
{
double *b = function();

std::cout << b[0] << std::endl;
}

It seems to me that there is a memory leak there as I don't delete[] b in the end of function2, but when I try to do so I get an error message at runtime.

[Denis]

If you don't use pointer after call function2 you can call delete into function2

void function2()
{
double *b = function();

std::cout << b[0] << std::endl;
delete[] b;
b = 0;
}

Of course if you need access after that you get crash

[antonin07130]

Thanks Denis,
Well, I have this error message :

malloc: *** error for object 0x11f3e1af0: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

When I try to delete the array in the end of the function2

That comes from trying to deallocate an already deallocated pointer right?

(BTW, I posted the thread twice, I'd like to delete the second post)

[RedX]

That's odd. The code you posted should not break with this message. You clearly only free it once there. Post more code if possible please.