The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2022.07.01.09.54.36 prlw1 src/sys/kern/kern_fork.c,v 1.229 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2022.07.html#2022.07.01.09.54.36