Bug              1562 util.c                 Bug("cmp called with a->x[a->wds-1] == 0");
Bug              1564 util.c                 Bug("cmp called with b->x[b->wds-1] == 0");
Bug              1721 util.c             if (!y) Bug("zero y in b2d");
Bug              1821 util.c                     Bug("Zero passed to d2b");
Bug              1858 util.c                     Bug("Zero passed to d2b");
Bug              2960 util.c             /*debug*/   Bug("oversize b in quorem");
Bug              2971 util.c             /*debug*/   Bug("oversized quotient in quorem");