The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2017.01.13.03.01.09 kre src/tests/kernel/t_ptrace_wait.c,v 1.55 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2017.01.html#2017.01.13.03.01.09