The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2017.06.12.08.19.22 pgoyette src/sys/dev/wscons/wsmux.c,v 1.63
Log files can be found at:
http://releng.NetBSD.org/b5reports/i386/commits-2017.06.html#2017.06.12.08.19.22
