The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2019.02.05.19.42.31 christos src/sys/dev/raidframe/rf_compat80.c,v 1.10 2019.02.05.19.53.13 christos src/share/doc/smm/18.net/6.t,v 1.6 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2019.02.html#2019.02.05.19.53.13