smallbin_at       690 lj_alloc.c       mchunkptr B = smallbin_at(M, I);\
smallbin_at       908 lj_alloc.c         sbinptr bin = smallbin_at(m,i);
smallbin_at      1289 lj_alloc.c           b = smallbin_at(ms, idx);
smallbin_at      1301 lj_alloc.c     	b = smallbin_at(ms, i);