Bug              1483 util.c                 Bug("cmp called with a->x[a->wds-1] == 0");
Bug              1485 util.c                 Bug("cmp called with b->x[b->wds-1] == 0");
Bug              1643 util.c             if (!y) Bug("zero y in b2d");
Bug              1747 util.c                     Bug("Zero passed to d2b");
Bug              1784 util.c                     Bug("Zero passed to d2b");
Bug              2955 util.c             /*debug*/   Bug("oversize b in quorem");
Bug              2966 util.c             /*debug*/   Bug("oversized quotient in quorem");