The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2021.04.25.05.33.20 thorpej src/tests/dev/scsipi/libscsitest/scsitest.c,v 1.4 2021.04.25.05.52.22 nia src/share/man/man8/compat_linux.8,v 1.42 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2021.04.html#2021.04.25.05.52.22