environment-modules should depend on tcl and not on tcl8.6

[Rene Meier]

# lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04
# apt-cache policy environment-modules
environment-modules:
  Installiert: 4.1.1-1
  Installationskandidat: 4.1.1-1
  Versionstabelle:
 *** 4.1.1-1 500
        500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status

Installing environment-modules on a clean server install pulls in tcl8.6 as a dependency. After installation no tclsh is available, but its needed by e.g. /usr/share/modules/init/bash. Installing tcl makes /usr/bin/tclsh available.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Eric G. Stern (egstern1)]

I hit this in testing using vagrant to spin up virtual machines. I start with the vagrant box bento/ubuntu-18.04 from app.vagrantup.com/boxes. After I install environment-modules, I can't list any modules because of the above problem. It works after I explicitly install the tcl package.

[C.Huhn (c-huhn)]

This bug seems to be fixed in Debian Bullseye (environment-modules >= 4.5.0-1)