[Bug 1646739] Re: package php7.0-xml 7.0.13-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128

[Nish Aravamudan]

For those that do see this issue, is it reproducible from update-
manager? That is, once it happens, if you cancle/quit update-manager,
and then try to use it to update again, does it again hang (e.g., on
php7.0-xml as in this bug report).

If so, we might be able to get some more debugging by modifying the
postinst locally.

@f-abeni: do you have any local modifications to your php-xml .ini file
snippet? Also, if you do re-encounter the hang, does
/var/log/apt/history.log contain the "Use of uninitialized value" errors
already (before you hit cancel or kill update-manager)?

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https://bugs.launchpad.net/bugs/1646739

Title:
  package php7.0-xml 7.0.13-0ubuntu0.16.04.1 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 128

Status in debconf package in Ubuntu:
  Confirmed
Status in php7.0 package in Ubuntu:
  Confirmed
Status in update-manager package in Ubuntu:
  Confirmed

Bug description:
  During a software upgrade, process was stuck on php7.0-xml
  configuration for 20 minutes, after that I killed the process. I am
  not sure what additional info are required, will be happy to provide
  any.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: php7.0-xml 7.0.13-0ubuntu0.16.04.1
  ProcVersionSignature: Ubuntu 4.4.0-49.70-generic 4.4.30
  Uname: Linux 4.4.0-49-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.2
  Architecture: amd64
  Date: Fri Dec  2 09:52:06 2016
  ErrorMessage: subprocess installed post-installation script returned error exit status 128
  InstallationDate: Installed on 2016-03-11 (265 days ago)
  InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64 (20151021)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.1
   apt  1.2.15
  SourcePackage: php7.0
  Title: package php7.0-xml 7.0.13-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128
  UpgradeStatus: Upgraded to xenial on 2016-05-07 (209 days ago)

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