The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2019.09.16.08.31.05 mlelstv src/distrib/sets/lists/man/mi,v 1.1653 2019.09.16.09.35.20 maya src/external/mit/expat/dist/Attic/expat_config.h,v 1.2 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2019.09.html#2019.09.16.09.35.20