The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2018.08.28.08.17.10 skrll src/sys/external/bsd/dwc2/dwc2.c,v 1.54 2018.08.28.08.20.27 martin src/sys/external/bsd/drm2/dist/drm/drm_drv.c,v 1.10 2018.08.28.08.37.53 skrll src/sys/external/bsd/common/include/linux/printk.h,v 1.4 2018.08.28.08.48.42 skrll src/sys/external/bsd/common/include/linux/printk.h,v 1.5 2018.08.28.08.50.46 skrll src/sys/external/bsd/common/include/linux/printk.h,v 1.6 2018.08.28.09.10.28 christos src/crypto/dist/ipsec-tools/src/racoon/privsep.c,v 1.25 2018.08.28.09.25.21 skrll src/sys/external/bsd/vchiq/dist/interface/compat/vchi_bsd.h,v 1.15 2018.08.28.09.42.10 martin src/distrib/sets/lists/modules/md.amd64,v 1.77 2018.08.28.09.42.10 martin src/distrib/sets/lists/modules/md.i386,v 1.81 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2018.08.html#2018.08.28.09.42.10