The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2019.01.01.06.28.42 maya src/distrib/sets/lists/base/mi,v 1.1197 2019.01.01.06.28.42 maya src/distrib/sets/lists/comp/mi,v 1.2247 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2019.01.html#2019.01.01.06.28.42