Present since December 27, 2017. Clearly a Docker Hub problem. Does not reproduce for local compose or local build. ENV is being ignored by Hub for unknown reasons. Build errors in RUN but Docker Hub is no longer respecting ERROR conditions and pushing broken images anyways.
[91mERROR: unsatisfiable constraints: [0m pkg_common (missing): required by: world[pkg_common] [91mln: /etc/service/: No such file or directory
Issue found to unexpected change in escaping during pre_build phase; also determined that error checking was not sufficiently robust for the RUN phase. This issue is resolved and builds are working again.
Present since December 27, 2017. Clearly a Docker Hub problem. Does not reproduce for local compose or local build. ENV is being ignored by Hub for unknown reasons. Build errors in RUN but Docker Hub is no longer respecting ERROR conditions and pushing broken images anyways.