[Bug 1685682] [NEW] package libqtcore4 (not installed) failed to install/upgrade: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64

[Sabin RanaBhat]

Public bug reported:

I was trying to install fbreader on my ubuntu-gnome 17.04
sudo apt-get install fbreader

Reading package lists... Done
Building dependency tree       
Reading state information... Done
fbreader is already the newest version (0.99.4-1).
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 fbreader : Depends: libqtcore4 (>= 4:4.7.0~beta1) but it is not going to be installed
 libqt4-declarative : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libqt4-network : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libqt4-script : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libqt4-sql : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libqt4-sql-mysql : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libqt4-xml : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libqt4-xmlpatterns : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libqtdbus4 : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libqtgui4 : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 libzlui-qt4 : Depends: libqtcore4 (>= 4:4.7.0~beta1) but it is not going to be installed
 qdbus : Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
 qt-at-spi : Depends: libqtcore4 (>= 4:4.8~) but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).


I had tried 
sudo apt --fix-broken install

output was

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  libzlcore-data libzlcore0.13 libzltext-data libzltext0.13 libzlui-qt4
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  libqtcore4
Suggested packages:
  libicu55
The following NEW packages will be installed:
  libqtcore4
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
14 not fully installed or removed.
Need to get 0 B/1,552 kB of archives.
After this operation, 5,084 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 158925 files and directories currently installed.)
Preparing to unpack .../libqtcore4_4%3a4.8.7+dfsg-7ubuntu1_amd64.deb ...
Unpacking libqtcore4:amd64 (4:4.8.7+dfsg-7ubuntu1) ...
dpkg: error processing archive /var/cache/apt/archives/libqtcore4_4%3a4.8.7+dfsg-7ubuntu1_amd64.deb (--unpack):
 trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/libqtcore4_4%3a4.8.7+dfsg-7ubuntu1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 17.04
Package: libqtcore4 (not installed)
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
AptOrdering:
 libqtcore4:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
Date: Mon Apr 24 07:44:46 2017
DpkgHistoryLog:
 Start-Date: 2017-04-24  07:44:45
 Commandline: apt --fix-broken install
 Requested-By: sabin (1000)
 Install: libqtcore4:amd64 (4:4.8.7+dfsg-7ubuntu1, automatic)
DpkgTerminalLog:
 Preparing to unpack .../libqtcore4_4%3a4.8.7+dfsg-7ubuntu1_amd64.deb ...
 Unpacking libqtcore4:amd64 (4:4.8.7+dfsg-7ubuntu1) ...
 dpkg: error processing archive /var/cache/apt/archives/libqtcore4_4%3a4.8.7+dfsg-7ubuntu1_amd64.deb (--unpack):
  trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64
ErrorMessage: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64
RelatedPackageVersions:
 dpkg 1.18.10ubuntu2
 apt  1.4
SourcePackage: qt4-x11
Title: package libqtcore4 (not installed) failed to install/upgrade: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: qt4-x11 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-package zesty

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https://bugs.launchpad.net/bugs/1685682

Title:
  package libqtcore4 (not installed) failed to install/upgrade: trying
  to overwrite shared '/etc/xdg/Trolltech.conf', which is different from
  other instances of package libqtcore4:amd64

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