The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2017.04.26.13.53.18 mbalmer src/external/mit/lua/dist/src/lauxlib.c,v 1.10 2017.04.26.13.58.01 mbalmer src/doc/3RDPARTY,v 1.1439 2017.04.26.13.59.56 mbalmer src/doc/CHANGES,v 1.2278 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2017.04.html#2017.04.26.13.59.56