ONIG_OPTIMIZE_EXACT_IC 4698 ext/mbstring/oniguruma/regcomp.c     reg->optimize = ONIG_OPTIMIZE_EXACT_IC;
ONIG_OPTIMIZE_EXACT_IC 3314 ext/mbstring/oniguruma/regexec.c   case ONIG_OPTIMIZE_EXACT_IC:
ONIG_OPTIMIZE_EXACT_IC 3435 ext/mbstring/oniguruma/regexec.c   case ONIG_OPTIMIZE_EXACT_IC: