crash « memory « C Array Q&A

1. How do you prevent variable-length arrays from crashing when there is not enough memory?    stackoverflow.com

Before variable-length arrays were supported, I would dynamically allocate them like this:

int foo(size_t n)
{
    int *arr = malloc(n * sizeof int);
    if (!arr) return ENOMEM; ...

2. Expanding an array of ints using realloc crashes!    stackoverflow.com

I'm trying to expand an array of ints on the heap using realloc but the programme is crashing when I use my custom function "ExpandArrayOfInts" but works fine when I write ...