ONIG_SYN_ALLOW_INVALID_INTERVAL  687 regint.h           ONIG_SYN_CONTEXT_INVALID_REPEAT_OPS | ONIG_SYN_ALLOW_INVALID_INTERVAL | \
ONIG_SYN_ALLOW_INVALID_INTERVAL 2325 regparse.c       syn_allow = IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_INVALID_INTERVAL);