opam 2.0.0-4 is marked for autoremoval from testing on 2018-11-12 It is affected by these RC bugs: 909542: opam: FTBFS when built with dpkg-buildpackage -A 910222: opam: copyright file missing after upgrade (policy 12.5)
It (build-)depends on packages with these RC bugs: 885677: liblablgtksourceview2-ocaml: Depends on unmaintained gtksourceview2