258   int extra = nvars - nexps;  in adjust_assign()  local
260     extra++;  /* includes call itself */  in adjust_assign()
261     if (extra < 0) extra = 0;  in adjust_assign()
262     luaK_setreturns(fs, e, extra);  /* last exp. provides the difference */  in adjust_assign()
263     if (extra > 1) luaK_reserveregs(fs, extra-1);  in adjust_assign()
267     if (extra > 0) {  in adjust_assign()
269       luaK_reserveregs(fs, extra);  in adjust_assign()
270       luaK_nil(fs, reg, extra);  in adjust_assign()
910   int extra = fs->freereg;  /* eventual position to save local variable */  in check_conflict()  local
916         lh->v.u.s.info = extra;  /* previous assignment will use safe copy */  in check_conflict()
920         lh->v.u.s.aux = extra;  /* previous assignment will use safe copy */  in check_conflict()