The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2020.09.27.19.06.47 rillig src/usr.bin/make/job.c,v 1.244 2020.09.27.19.08.11 roy src/sys/conf/files,v 1.1276 2020.09.27.19.13.46 rillig src/usr.bin/make/job.c,v 1.245 2020.09.27.19.15.43 rillig src/usr.bin/make/job.h,v 1.49 2020.09.27.19.16.28 roy src/sys/net/if.c,v 1.483 2020.09.27.19.16.28 roy src/sys/net/if.h,v 1.288 2020.09.27.19.16.28 roy src/sys/net/if_bridge.c,v 1.176 2020.09.27.19.17.03 rillig src/usr.bin/make/job.h,v 1.50 2020.09.27.19.25.54 roy src/sys/net/if_tun.c,v 1.161 2020.09.27.19.36.54 roy src/share/man/man4/tap.4,v 1.15 2020.09.27.19.36.54 roy src/share/man/man4/tun.4,v 1.25 2020.09.27.19.55.21 roy src/usr.sbin/ifwatchd/ifwatchd.c,v 1.45 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2020.09.html#2020.09.27.19.55.21