The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2020.10.11.00.33.30 thorpej src/sys/arch/alpha/common/bus_dma.c,v 1.70 2020.10.11.00.33.30 thorpej src/sys/arch/alpha/common/sgmap_typedep.c,v 1.40 2020.10.11.00.33.30 thorpej src/sys/arch/alpha/include/bus_funcs.h,v 1.3 2020.10.11.00.33.30 thorpej src/sys/arch/alpha/tc/tc_dma_3000_500.c,v 1.22 2020.10.11.00.33.30 thorpej src/sys/arch/alpha/tc/tc_sgmap.c,v 1.9 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/apecs_dma.c,v 1.23 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/cia_dma.c,v 1.31 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/dwlpx_dma.c,v 1.27 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/lca_dma.c,v 1.25 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/mcpcia_dma.c,v 1.23 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/pci_sgmap_pte32.c,v 1.9 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/pci_sgmap_pte64.c,v 1.9 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/tsp_dma.c,v 1.15 2020.10.11.00.33.31 thorpej src/sys/arch/alpha/pci/ttwoga_dma.c,v 1.9 2020.10.11.07.07.31 rin src/external/bsd/ntp/Makefile.inc,v 1.21 2020.10.11.07.07.31 rin src/external/bsd/ntp/bin/ntp-keygen/Makefile,v 1.7 2020.10.11.07.07.31 rin src/external/bsd/ntp/bin/ntpd/Makefile,v 1.28 2020.10.11.07.07.31 rin src/external/bsd/ntp/bin/ntpdc/Makefile,v 1.7 2020.10.11.07.07.31 rin src/external/bsd/ntp/bin/ntpq/Makefile,v 1.9 2020.10.11.07.07.32 rin src/external/bsd/ntp/bin/sntp/Makefile,v 1.9 2020.10.11.07.08.29 nia src/external/mit/ctwm/etc/system.ctwmrc,v 1.5 2020.10.11.10.02.51 nia src/external/mit/ctwm/etc/system.ctwmrc,v 1.6 2020.10.11.10.08.26 nia src/external/mit/xorg/bin/xinit/Makefile,v 1.10 2020.10.11.10.12.53 nia src/external/mit/ctwm/etc/system.ctwmrc,v 1.7 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2020.10.html#2020.10.11.10.12.53