Bug#812576: okular: Fails to show up

[Lucio Crusca <lucio@sulweb.org>]

Package: okular
Version: 4:15.08.3-1
Severity: important

I'm running a mix of testing and unstable. I update more or less once in a week. Since a few days okular doesn't
work anymore, e.g. the main window does not show up anymore. When I launch it, the program does not exit and it
just hangs without creating any window, but a simple CTRL-C is enough to kill it and give me the terminal back.
Here is all I get in the terminal:

$ okular
okular(29159)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from "/var/tmp/kdecache-lucio/ksycoca4"
okular(29159)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
okular(29159)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
okular(29159)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
okular(29159)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
[ here I can wait ages, but nothing happens ]
^C
$ 

I'm using XFCE.

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (998, 'testing'), (994, 'unstable'), (700, 'stable'), (500, 'stable-updates')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.3.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=it_IT.utf8, LC_CTYPE=it_IT.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages okular depends on:
ii  kde-runtime         4:15.08.3-1
ii  libc6               2.21-6
ii  libfreetype6        2.6.1-0.1
ii  libjpeg62-turbo     1:1.4.1-2
ii  libkactivities6     4:4.13.3-1
ii  libkdecore5         4:4.14.14-1+b1
ii  libkdeui5           4:4.14.14-1+b1
ii  libkexiv2-11        4:15.04.3-1
ii  libkio5             4:4.14.14-1+b1
ii  libkparts4          4:4.14.14-1+b1
ii  libkprintutils4     4:4.14.14-1+b1
ii  libkpty4            4:4.14.14-1+b1
ii  libokularcore6      4:15.08.3-1
ii  libphonon4          4:4.8.3-2
ii  libpoppler-qt4-4    0.38.0-2
ii  libqca2             2.1.1-2
ii  libqimageblitz4     1:0.0.6-4
ii  libqmobipocket1     4:14.12.2-2
ii  libqt4-dbus         4:4.8.7+dfsg-5
ii  libqt4-declarative  4:4.8.7+dfsg-5
ii  libqt4-svg          4:4.8.7+dfsg-5
ii  libqt4-xml          4:4.8.7+dfsg-5
ii  libqtcore4          4:4.8.7+dfsg-5
ii  libqtgui4           4:4.8.7+dfsg-5
ii  libsolid4           4:4.14.14-1+b1
ii  libspectre1         0.2.7-3
ii  libstdc++6          5.3.1-5
ii  phonon              4:4.8.3-2
ii  zlib1g              1:1.2.8.dfsg-2+b1

Versions of packages okular recommends:
ii  cups-bsd  2.1.2-2

Versions of packages okular suggests:
ii  ghostscript            9.16~dfsg-2
pn  jovie                  <none>
pn  okular-extra-backends  <none>
ii  poppler-data           0.4.7-7
ii  texlive-binaries       2015.20150524.37493-7+b1
ii  unrar                  1:5.3.2-1

-- no debconf information