There are currently no pipelines.
To run a merge request pipeline, the jobs in the CI/CD configuration file must be configured to run in merge request pipelines.
Fixes #12992 . Please see that issue for the problem description and a reproducible example including the fix.
I wasn't able to get the automated test suite running locally, so I haven't added any tests for this. But I'd be happy to add them if someone can point me in the right direction.
To run a merge request pipeline, the jobs in the CI/CD configuration file must be configured to run in merge request pipelines.