The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2021.01.03.20.38.26 rillig src/usr.bin/xlint/lint1/cgram.y,v 1.129 2021.01.03.20.38.26 rillig src/usr.bin/xlint/lint1/externs1.h,v 1.48 2021.01.03.20.38.26 rillig src/usr.bin/xlint/lint1/tree.c,v 1.122 2021.01.03.20.44.54 rillig src/usr.bin/xlint/lint1/Makefile.err-msgs-h,v 1.2 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2021.01.html#2021.01.03.20.44.54