LJ_GC_SFIXED      402 lj_gc.c              lua_assert(isdead(g, o) || ow == LJ_GC_SFIXED);
LJ_GC_SFIXED      561 lj_gc.c          g->gc.currentwhite = LJ_GC_WHITES | LJ_GC_SFIXED;
LJ_GC_SFIXED      195 lj_state.c       L->marked = LJ_GC_WHITE0 | LJ_GC_FIXED | LJ_GC_SFIXED;  /* Prevent free. */