[Python-apps-team] Bug#851016: beets: FTBFS: Test failures

[Carl Suster]

This looks like https://github.com/beetbox/beets/issues/2153 i.e. that the 
current version of mutagen that we have in Debian (1.36) is incompatible with 
the version of beets (1.3.19). Quoting from that issue:

  > when beets 1.3.19 was released, Mutagen 1.33 didn't exist yet.
  > When that was released, it changed the way exceptions work, which
  > broke those tests. We've since fixed compatibility with the
  > latest version, but we can't go back in time and change the
  > version specifier for 1.3.19.

So the easiest way to fix this will be to update to the latest upstream beets in 
Debian.