The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2019.09.29.18.51.08 rmind src/usr.sbin/npf/npfctl/npf_build.c,v 1.52 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2019.09.html#2019.09.29.18.51.08