Public bug reported:

On uploading a changes file with the distribution set to an
unknown/unexpected value, mini-dinstall goes into an infinite loop
trying to process the same changes file over and over again.

If it's set to email on errors, it will cause a real flood of email.

This bug exists in Xenial, Bionic as well as the upstream Debian
package. It might be appropriate to report and fix this upstream.

The attached patch is a minimal fix.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: mini-dinstall 0.6.31ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-52.56-generic 4.15.18
Uname: Linux 4.15.0-52-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: i3
Date: Wed Jul  3 14:21:00 2019
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-06-30 (368 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
PackageArchitecture: all
SourcePackage: mini-dinstall
UpgradeStatus: Upgraded to bionic on 2019-02-20 (132 days ago)

** Affects: mini-dinstall (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

** Patch added: "ignore-bad-changesfiles.patch"
   
https://bugs.launchpad.net/bugs/1835212/+attachment/5274858/+files/ignore-bad-changesfiles.patch

** Attachment removed: "Dependencies.txt"
   
https://bugs.launchpad.net/ubuntu/+source/mini-dinstall/+bug/1835212/+attachment/5274859/+files/Dependencies.txt

** Attachment removed: "ProcCpuinfoMinimal.txt"
   
https://bugs.launchpad.net/ubuntu/+source/mini-dinstall/+bug/1835212/+attachment/5274860/+files/ProcCpuinfoMinimal.txt

** Attachment removed: "ProcEnviron.txt"
   
https://bugs.launchpad.net/ubuntu/+source/mini-dinstall/+bug/1835212/+attachment/5274861/+files/ProcEnviron.txt

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https://bugs.launchpad.net/bugs/1835212

Title:
  Infinite loop on processing a changefile with an unknown distribution

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