The 31c6c8150394de067085be5b0058037077860a8a oe-core commit applies only for class_target. If the extrausers.bbclass class is used, the users are populated with package shadow-native which doesn't have the patch.
INHERIT += 'extrausers' EXTRA_USERS_PARAMS += "useradd -p '' aBcD; " From log.do_rootfs: NOTE: core-image-minimal: Performing useradd with [-R /media/pbergin/extssd/windriver/wrl18_std/build/tmp-glibc/work/qemux86_64-wrs-linux/core-image-minimal/1.0-r0/rootfs -p '' aBcD] useradd: invalid user name 'aBcD' ERROR: core-image-minimal: useradd command did not succeed.