Public bug reported:
Since upgrading from 16.04 to 18.04, some programs that depend on
libpng16.so.16 do not work with the error
ImportError: /opt/yann/pyzo-4.5.1/lib/python3.5/../libz.so.1: version
`ZLIB_1.2.9' not found (required by /usr/lib/x86_64-linux-
gnu/libpng16.so.16)
Reinstalling the libpng16-16 package does not improve things.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: libpng16-16 1.6.34-1
ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
Uname: Linux 4.15.0-24-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Jul 5 13:19:44 2018
Dependencies:
gcc-8-base 8-20180414-1ubuntu2
libc6 2.27-3ubuntu1
libgcc1 1:8-20180414-1ubuntu2
zlib1g 1:1.2.11.dfsg-0ubuntu2
InstallationDate: Installed on 2016-09-07 (665 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: libpng1.6
UpgradeStatus: Upgraded to bionic on 2018-07-01 (3 days ago)
** Affects: libpng1.6 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1780233
Title:
libpng16-16 needs ZLIB_1.2.9 but package does not install it
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