The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2020.09.13.13.03.15 rillig src/distrib/sets/lists/tests/mi,v 1.922 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2020.09.html#2020.09.13.13.03.15