Instead of just printing a warning and going on, this will generate
an error and stop processing.
This used to be part of #10561 but I decided it might need its own
independent discussion/PR as to not derail #10561.
Signed-off-by: Doug Davis <dug@us.ibm.com>
Upstream-commit: 8a5b50d65dae2d0607e046c57241dd6b46b65c6a
Component: engine