FL_USER4          121 ext/stringio/stringio.c #define STRIO_READABLE FL_USER4
FL_USER4          508 internal.h     #define BIGNUM_EMBED_LEN_MASK (FL_USER5|FL_USER4|FL_USER3)
FL_USER4          708 internal.h     #define IMEMO_FL_USER1 FL_USER4
FL_USER4          291 re.c           #define KCODE_FIXED FL_USER4
FL_USER4         4331 thread.c       #define THREAD_SHIELD_WAITING_MASK (FL_USER0|FL_USER1|FL_USER2|FL_USER3|FL_USER4|FL_USER5|FL_USER6|FL_USER7|FL_USER8|FL_USER9|FL_USER10|FL_USER11|FL_USER12|FL_USER13|FL_USER14|FL_USER15|FL_USER16|FL_USER17|FL_USER18|FL_USER19)