1Invalid write of size 1
2   at 0x........: main (exitprog.c:18)
3 Address 0x........ is 0 bytes after a block of size 1,000,000 alloc'd
4   at 0x........: malloc (vg_replace_malloc.c:...)
5   by 0x........: main (exitprog.c:15)
6
7