What if, memory allocated using malloc is deleted using delete rather than free

Question

I came across an issue which I could not resolve.

My question is, if I used malloc to allocate memory and then memory block is delete using delete

Answer 1

From the documentation,

void free (void* ptr); 

ptr::

Pointer to a memory block previously allocated with malloc, calloc or realloc.

And what you are passing is not a pointer, so it complains.

 A *b = new A();
 cout << b->lol() << endl;
 free(b); // Will Not cause error