Re: [PATCH v2 1/4] reftable: avoid leaks on realloc error

> @@ -141,5 +146,30 @@ int cmd_main(int argc UNUSED, const char *argv[] UNUSED)
>  		check_int(in, ==, out);
>  	}
> 
> +	if_test ("REFTABLE_ALLOC_GROW_OR_NULL works") {
> +		int *arr = NULL;
> +		size_t alloc = 0, old_alloc;
> +
> +		REFTABLE_ALLOC_GROW_OR_NULL(arr, 1, alloc);
> +		check(arr != NULL);
> +		check_uint(alloc, >=, 1);
> +		arr[0] = 42;
> +
> +		old_alloc = alloc;
> +		REFTABLE_ALLOC_GROW_OR_NULL(arr, old_alloc + 1, alloc);
> +		check(arr != NULL);
> +		check_uint(alloc, >, old_alloc);
> +		arr[alloc - 1] = 42;
> +
> +		old_alloc = alloc;
> +		reftable_set_alloc(malloc, realloc_stub, free);
> +		REFTABLE_ALLOC_GROW_OR_NULL(arr, old_alloc + 1, alloc);
> +		check(arr == NULL);
> +		check_uint(alloc, ==, 0);
> +		reftable_set_alloc(malloc, realloc, free);
> +
> +		reftable_free(arr);
> +	}
> +