[Bug 1991525] Re: vim.gtk3 won't run after 22.04 upgrade: “libpng12.so.0: cannot open shared object file”

[Smylers]

> Can you make sure all of your packages are up to date?

apt update and apt upgrade claim so. And:

  $ apt-show-versions | grep -v 'not installed\|uptodate'

doesn't list any packages as being out of date.

> it may be some dependency of vim that is out of date trying to read
it.

It certainly seems like something is the wrong version. Is there any way
I can trace which library or packages is truing to load libpng12?

Or a way of checking that all Vim's dependencies are at exactly the
versions they should be for jammy?

Thanks.

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https://bugs.launchpad.net/bugs/1991525

Title:
  vim.gtk3 won't run after 22.04 upgrade: “libpng12.so.0: cannot open
  shared object file”

Status in vim package in Ubuntu:
  Incomplete

Bug description:
  After upgrading a system running Ubuntu 20.04 to 22.04, vim.gtk3 no
  longer runs:

    $ vim.gtk3
    vim.gtk3: error while loading shared libraries: libpng12.so.0: cannot open shared object file: No such file or directory

  (vim.basic still runs fine).

  These are the vim packages we have installed, and their versions:

    vim:amd64/jammy-security 2:8.2.3995-1ubuntu2.1 uptodate
    vim-common:all/jammy-security 2:8.2.3995-1ubuntu2.1 uptodate
    vim-gtk3:amd64/jammy-security 2:8.2.3995-1ubuntu2.1 uptodate
    vim-gui-common:all/jammy-security 2:8.2.3995-1ubuntu2.1 uptodate
    vim-runtime:all/jammy-security 2:8.2.3995-1ubuntu2.1 uptodate
    vim-tiny:amd64/jammy-security 2:8.2.3995-1ubuntu2.1 uptodate

  Previously I did have a PPA of Vim installed from
  http://ppa.launchpad.net/jonathonf/vim/ubuntu — but that has been
  purged, and as you can see all the vim packages now installed are
  official Ubuntu jammy versions.

  libpng12 isn't in Ubuntu any more, so I think the problem is that vim
  is trying to use it, not that it's missing.

  Attached is strace output of the failure.

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