The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2020.06.27.11.06.43 mlelstv src/regress/lib/libc/Makefile,v 1.83 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2020.06.html#2020.06.27.11.06.43