The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2017.01.07.22.37.22 christos src/etc/mtree/special,v 1.156 2017.01.07.23.05.35 christos src/distrib/sets/lists/etc/mi,v 1.245 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2017.01.html#2017.01.07.23.05.35