RB_OBJ_PROMOTED  1425 include/ruby/ruby.h #define RB_OBJ_PROMOTED(x)          (RB_SPECIAL_CONST_P(x) ? 0 : RB_OBJ_PROMOTED_RAW(x))
RB_OBJ_PROMOTED  1432 include/ruby/ruby.h #define RB_OBJ_PROMOTED(x)          0