[Bug 1663164] Re: liblz4-tool packaging

[kimble]

It's certainly nothing to do with "that weird script", that you haven't
even looked at, because it can be reproduced directly from the terminal:

====
$ sudo apt install liblz4-tool
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 liblz4-tool : Depends: liblz4-1 (= 0.0~r131-2) but 0.0~r131-2ubuntu2 is to be installed
E: Unable to correct problems, you have held broken packages.
$
====

I don't know how
$ apt-cache show liblz4-tool | grep Depends
works, but maybe the manifest documentation doesn't agree with the call in the code.

Did you actually try to reproduce the bug?

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https://bugs.launchpad.net/bugs/1663164

Title:
  liblz4-tool packaging

Status in lz4 package in Ubuntu:
  Invalid

Bug description:
  I have Lubuntu 16.04 which uses lubuntu-desktop.  That pseudo-package includes liblz4-1 (= 0.0~r131-2ubuntu2).
  I am now trying to install iRedMail_0.9.6 by means of its bash script, which calls for liblz4-tool to be installed. 
  But instead of having the dependency liblz4-1 (= 0.0~r131-2ubuntu2) liblz4-tool wants liblz4-1 (= 0.0~r131-2) and can't match it.

  ====
  $ sudo apt install liblz4-tool
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:

  The following packages have unmet dependencies:
   liblz4-tool : Depends: liblz4-1 (= 0.0~r131-2) but 0.0~r131-2ubuntu2 is to be installed
  E: Unable to correct problems, you have held broken packages.
  $
  ====

  
  http://packages.ubuntu.com/xenial/liblz4-tool
  Package: liblz4-tool (0.0~r131-2ubuntu2) [universe]
  Dependencies:
      liblz4-1 (= 0.0~r131-2ubuntu2)

  To reproduce:
  Install liblz4-1  (= 0.0~r131-2ubuntu2)
  Install liblz4-tool  (= 0.0~r131-2ubuntu2)

  Expected: installs OK

  Actual: Fails: "unmet dependencies:
   liblz4-tool : Depends: liblz4-1 (= 0.0~r131-2) but 0.0~r131-2ubuntu2 is to be installed"

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