https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107959
--- Comment #1 from Gaius Mulley <gaius at gcc dot gnu.org> --- Now fixed in git. $ gm2 -fiso badipv4.mod badipv4.mod:7:12: error: In procedure ‘ForeachIndiceInIndexDo’: expecting CHAR datatype and not ‘127’ a ‘Modula-2 base Z’ in the 0th component of the ‘IPV4’ array 7 | Loopback = IPV4 {127, 0, 0, 1} ; | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~ badipv4.mod:7:12: error: expecting CHAR datatype and not ‘1’ a ‘Modula-2 base Z’ in the 3rd component of the ‘IPV4’ array badipv4.mod:7:12: error: expecting CHAR datatype and not ‘0’ a ‘Modula-2 base Z’ in the 2nd component of the ‘IPV4’ array badipv4.mod:7:12: error: expecting CHAR datatype and not ‘0’ a ‘Modula-2 base Z’ in the 1st component of the ‘IPV4’ array