Since around yesterday the Travis CI builds fail, and it looks like there is a new "empty" build target:
- https://travis-ci.org/bitcoin/bitcoin/jobs/78208410 (one example)
This issue also affects builds routed through the container based infrastructure.
I haven't seen an announcement, and according to the Travis CI status ticker all systems are operational, so I began to wonder, whether this is something specific due to the build matrix.