The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2020.03.15.19.41.04 ad src/sys/arch/x86/x86/pmap.c,v 1.370 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2020.03.html#2020.03.15.19.41.04