The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2020.12.06.09.03.29 skrll src/sys/rump/librump/rumpkern/rump.c,v 1.351 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2020.12.html#2020.12.06.09.03.29