[Debian-med-packaging] Bug#866980: biomaj-watcher: fails to upgrade from 'jessie': Exception in thread "main" java.lang.UnsupportedClassVersionError: WatcherConfigurator : Unsupported major.minor version 52.0

[Andreas Beckmann]

Package: biomaj-watcher
Version: 1.2.2-4
Severity: serious
User: debian-qa at lists.debian.org
Usertags: piuparts

Hi,

during a test with piuparts I noticed your package fails to upgrade from
'jessie'.
It installed fine in 'jessie', then the upgrade to 'stretch' fails.

>From the attached log (scroll to the bottom...):

  Setting up biomaj-watcher (1.2.2-4) ...
  Exception in thread "main" java.lang.UnsupportedClassVersionError: WatcherConfigurator : Unsupported major.minor version 52.0
  	at java.lang.ClassLoader.defineClass1(Native Method)
  	at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
  	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
  	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
  	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
  	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
  	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
  	at java.security.AccessController.doPrivileged(Native Method)
  	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
  	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
  	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
  	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
  	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
  dpkg: error processing package biomaj-watcher (--configure):
   subprocess installed post-installation script returned error exit status 1


This was observed while doing two-stage upgrade tests:
  apt-get upgrade && apt-get dist-upgrade
during the apt-get upgrade phase.
A one-stage upgrade (only apt-get dist-upgrade) works fine.

There is probably an insufficiently versioned Depends (or Breaks) ...
but I have no idea which package could be meant with 
  Unsupported major.minor version 52.0


cheers,

Andreas
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