[Bug 1808216] [NEW] Cannot install amd64 and i386 versions of libicu-dev in parallel (on x86-64/bionic)

[Akos Kiss]

Public bug reported:

On an x86-64 machine with Ubuntu 18.04, I've tried to install both 64
and 32 bit versions of libicu-dev (because I wanted to build both 32 and
64 bit versions of an app using that lib). Unfortunately, when I install
the 64 bit version of the package then the 32 bit variant gets removed,
and when I install the 32 bit variant then the 64 bit version gets
removed.

Some (slightly sanitized) console logs:

$ cat /etc/issue.net 
Ubuntu 18.04.1 LTS
$ uname -mrs
Linux 4.15.0-38-generic x86_64
$ apt show libicu-dev
Package: libicu-dev
Version: 60.2-3ubuntu3
$ sudo apt install libicu-dev:i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libharfbuzz-dev:i386 libicu-le-hb-dev:i386
Suggested packages:
  icu-doc:i386
The following packages will be REMOVED:
  libharfbuzz-dev libicu-dev libicu-le-hb-dev
The following NEW packages will be installed:
  libharfbuzz-dev:i386 libicu-dev:i386 libicu-le-hb-dev:i386
0 upgraded, 3 newly installed, 3 to remove and 0 not upgraded.

Interestingly, on a Ubuntu 14.04.5 LTS (actually, on Travis CI), such a
conflict does not happen.

sudo apt-get install -y libicu-dev
sudo apt-get install -y libicu-dev:i386

These two work just fine, the latter does not remove the former. The
version there is libicu-dev 52.1-3ubuntu0.8.

** Affects: icu (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1808216

Title:
  Cannot install amd64 and i386 versions of libicu-dev in parallel (on
  x86-64/bionic)

Status in icu package in Ubuntu:
  New

Bug description:
  On an x86-64 machine with Ubuntu 18.04, I've tried to install both 64
  and 32 bit versions of libicu-dev (because I wanted to build both 32
  and 64 bit versions of an app using that lib). Unfortunately, when I
  install the 64 bit version of the package then the 32 bit variant gets
  removed, and when I install the 32 bit variant then the 64 bit version
  gets removed.

  Some (slightly sanitized) console logs:

  $ cat /etc/issue.net 
  Ubuntu 18.04.1 LTS
  $ uname -mrs
  Linux 4.15.0-38-generic x86_64
  $ apt show libicu-dev
  Package: libicu-dev
  Version: 60.2-3ubuntu3
  $ sudo apt install libicu-dev:i386
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following additional packages will be installed:
    libharfbuzz-dev:i386 libicu-le-hb-dev:i386
  Suggested packages:
    icu-doc:i386
  The following packages will be REMOVED:
    libharfbuzz-dev libicu-dev libicu-le-hb-dev
  The following NEW packages will be installed:
    libharfbuzz-dev:i386 libicu-dev:i386 libicu-le-hb-dev:i386
  0 upgraded, 3 newly installed, 3 to remove and 0 not upgraded.

  Interestingly, on a Ubuntu 14.04.5 LTS (actually, on Travis CI), such
  a conflict does not happen.

  sudo apt-get install -y libicu-dev
  sudo apt-get install -y libicu-dev:i386

  These two work just fine, the latter does not remove the former. The
  version there is libicu-dev 52.1-3ubuntu0.8.

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