[Piuparts-reports] problem with piuparts-slave detected

[piuparts slave]

Either a test is running for a very long time (but no test
should run longer than an hour), piuparts-slave hangs or is
not running at all or wasn't started with
~piupartss/bin/slave_run - please investigate and take
appropriate measures!

23:13:52 Reserved for us: python-qrencode 1.2-4+b2
23:13:52 Reserved for us: pocl-opencl-icd 1.1-7
23:13:52 Reserved for us: pocl-doc 1.1-7
23:13:52 Reserved for us: libpocl-dev 1.1-7
23:13:52 Reserved for us: libhwloc-doc 1.11.11-1
23:13:53 Master didn't reserve anything (more) for us
23:13:53 Master stretch2buster-rcmd status: successfully-tested=42322 failed-testing=887 cannot-be-tested=1 waiting-to-be-tested=92 waiting-for-dependency-to-be-tested=185 dependency-failed-testing=7363 dependency-cannot-be-tested=1 dependency-does-not-exist=6 unknown=0 outdated=0 total=50857
23:13:53 Connection to master closed
23:14:07 Deleting old reference-chroot-metadata.dat
23:14:07 Testing package stretch2buster-rcmd/education-ltsp-server 2.10.35