C code - 8 lines

Link:

C, pasted on Jun 12:

/* "Hello, World!": */

int a;
main(void)
{
    printf("Hello,World!"\n);
    return 0;
}

Output:

1
2
3

In function 'main':
Line 6: error: stray '\' in program
Line 6: error: expected ')' before 'n'