Does freeing an uninitialized pointer result in undefined behavior?

Question

If you have a pointer that is not initialized and, by mistake, try to free it, is this going to result in undefined behavior?

Like:

int main(void){

             


        

Answer 1

Yes, because accessing any uninitialised variable provokes undefined behaviour.

This includes passing an uninitialise pointer tofree(). This itself also includes the case where the uninitialise pointer "by accident" may have a value equal to NULL.