The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2019.05.11.11.53.55 maxv src/common/lib/libc/sys/cpuset.c,v 1.21 2019.05.11.11.59.21 maxv src/usr.sbin/cpuctl/cpuctl.c,v 1.30 2019.05.11.12.24.42 mlelstv src/usr.sbin/cpuctl/arch/i386-asm.S,v 1.6 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2019.05.html#2019.05.11.12.24.42