The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2016.10.11.13.39.34 roy src/sys/netinet/ip_carp.c,v 1.79 2016.10.11.13.59.30 roy src/sys/netinet/if_arp.c,v 1.230 2016.10.11.13.59.30 roy src/sys/netinet/in_var.h,v 1.88 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2016.10.html#2016.10.11.13.59.30