Bug#908049: remmina: Install fails because of a libssh-4 dependency problem

[Xavier <1v6npmdwo8vdlp7@jetable.org>]

Source: remmina
Version: 1.2.31.2+dfsg-1~bpo9+1
Severity: grave
Justification: renders package unusable

Dear Maintainer,

The remmina backport package fails because of a libssh-4 dependency problem, even if the backport version of this library is installed.

$ sudo apt install -t stretch-backports remmina
(…)
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:
 remmina : Depends: libssh-4 (>= 0.8.0~20170825.94fa1e38) but it is not
 going to be installed



$ sudo apt install -t stretch-backports remmina libssh-4
(…)
The following packages have unmet dependencies:
 libssh-4 : Breaks: remmina (< 1.2.31.2+dfsg-1+) but
 1.2.31.2+dfsg-1~bpo9+1 is to be installed
 E: Unable to correct problems, you have held broken packages.



$ sudo apt install -t stretch-backports libssh-4
(…)
$ sudo apt install -t stretch-backports remmina
(…)
The following packages have unmet dependencies:
 remmina : Depends: libssh-4 (>= 0.8.0~20170825.94fa1e38) but it is not
 going to be installed
 E: Unable to correct problems, you have held broken packages.



-- System Information:
Debian Release: 9.5
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-7-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE= (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)