stderr issue

import std.stdio;

void main() {
    stderr.open("error.log", "a");
    stdout.open("output.log", "a");

    int[] numbers = [ 1, 2, 3, 4, 5 ];
    int i;

    while (i <= numbers.length) { // cause range error
        write(numbers[i], " ");
        ++i;
    }

    writeln();
}