The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2021.01.21.20.48.33 reinoud src/sys/dev/pci/virtio_pci.c,v 1.18 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2021.01.html#2021.01.21.20.48.33