The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2016.08.07.01.47.11 kre src/sys/ufs/ext2fs/ext2fs_dir.h,v 1.22 2016.08.07.01.59.43 pgoyette src/share/man/man4/pppoe.4,v 1.37 2016.08.07.01.59.43 pgoyette src/sys/modules/if_pppoe/Makefile,v 1.2 2016.08.07.01.59.43 pgoyette src/sys/net/if_pppoe.c,v 1.113 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2016.08.html#2016.08.07.01.59.43