RE_INVALID_INTERVAL_ORD 2508 lib/regcomp.c  	  if (BE (!(syntax & RE_INVALID_INTERVAL_ORD), 0))
RE_INVALID_INTERVAL_ORD  216 lib/regex.h    # define RE_ICASE (RE_INVALID_INTERVAL_ORD << 1)
RE_INVALID_INTERVAL_ORD  275 lib/regex.h       | RE_INVALID_INTERVAL_ORD)