Comment 3 for bug 1877769

Verified 2.3ubuntu0.1 on Focal:

https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/amd64/u/unattended-upgrades/20200722_172955_59a0f@/log.gz :

...
Running ./test_rewind.py with python3
INFO:root:Allowed origins are: o=Ubuntu,a=lucid-security
INFO:root:Initial blacklist: ant-doc
INFO:root:Initial whitelist (not strict):
DEBUG:root:Marking not allowed <apt_pkg.PackageFile object: filename:'/tmp/autopkgtest.QeV87E/build.hoM/src/test/root.rewind/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_lucid-updates_main_binary-amd64_Packages' a=lucid-updates,c=main,v=10.04,o=Ubuntu,l=Ubuntu arch='amd64' site='archive.ubuntu.com' IndexType='Debian Package Index' Size=894 ID:0> with -32768 pin
DEBUG:root:Applying pinning: PkgFilePin(id=0, priority=-32768)
DEBUG:root:Applying pin -32768 to package_file: <apt_pkg.PackageFile object: filename:'/tmp/autopkgtest.QeV87E/build.hoM/src/test/root.rewind/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_lucid-updates_main_binary-amd64_Packages' a=lucid-updates,c=main,v=10.04,o=Ubuntu,l=Ubuntu arch='amd64' site='archive.ubuntu.com' IndexType='Debian Package Index' Size=894 ID:0>
DEBUG:root:APT::VersionedKernelPackages is not set
DEBUG:root:adjusting candidate version: test-package=2.0
DEBUG:root:adjusting candidate version: test2-package=2.0
DEBUG:root:falling back to adjusting test2-package's dependencies
DEBUG:root:falling back to adjusting z-package's dependencies
DEBUG:root:sanity check failed for: set() : no package is selected to be upgraded or installed
.
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Ran 1 test in 0.063s

OK
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