//     codes (with REG_ omitted) or the match array, a list of (m,n)
	//     entries with m and n being first and last+1 positions in the
	//     field 3 string, or NULL if REG_NOSUB is in effect and success
	//     is expected. BADPAT is acceptable in place of any regcomp(3)
	//     error code. The match[] array is initialized to (-2,-2) before
	//     each test. All array elements from 0 to nmatch-1 must be specified