The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2020.07.03.12.39.54 isaki src/sys/dev/pci/auixp.c,v 1.50 2020.07.03.12.53.27 roy src/distrib/sets/lists/base/mi,v 1.1254 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2020.07.html#2020.07.03.12.53.27