Bug#797897: juk: Clicking on playback progress bar sometimes causes a freeze

[Francois Gouget <fgouget@free.fr>]

Package: juk
Version: 4:4.14.2-1
Severity: normal

Dear Maintainer,

To reproduce this problem:
 * Start playing an MP3 file.
 * Click on the playback progress bar to fast-forward to somewhere in the middle of the track.
 * The track will (seemingly) stop playing and the progress bar will stop moving.
 * You can then click on another track and playing that track will start normally.
 * If instead you click on another place in the progress bar the Juk GUI will freeze,
   that is it will stop responding and redrawing.

Notes:
 * This does not happen with all MP3 files. I have uploaded one that triggers this issue
   to the URL below:
   http://fgouget.free.fr/tmp/juk/NIN_Ghosts_I.mp3
   (from the free download in http://ghosts.nin.com/main/order_options)

 * Juk is in fact not totally frozen. If there was 3 minutes left to play in the track
   and you wait for 3 minutes, Juk will start to play the next track normally. If the
   GUI was frozen it will then also thaw.

This is quite annoying as it makes it impossible to skip to the middle of a track to
get a better idea of what it sounds like.


-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.1.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages juk depends on:
ii  kde-runtime        4:4.14.2-2
ii  libc6              2.19-19
ii  libgcc1            1:5.1.1-14
ii  libkde3support4    4:4.14.2-5
ii  libkdecore5        4:4.14.2-5
ii  libkdeui5          4:4.14.2-5
ii  libkio5            4:4.14.2-5
ii  libphonon4         4:4.8.3-1
ii  libqt4-dbus        4:4.8.7+dfsg-1
ii  libqt4-network     4:4.8.7+dfsg-1
ii  libqt4-qt3support  4:4.8.7+dfsg-1
ii  libqt4-svg         4:4.8.7+dfsg-1
ii  libqt4-xml         4:4.8.7+dfsg-1
ii  libqtcore4         4:4.8.7+dfsg-1
ii  libqtgui4          4:4.8.7+dfsg-1
ii  libstdc++6         5.1.1-14
ii  libtag1c2a         1.9.1-2.1
ii  phonon             4:4.8.3-1

juk recommends no packages.

Versions of packages juk suggests:
ii  k3b  2.0.2-8

-- no debconf information