Bug#755475: gnome-shell-common: since 3.12 components entered testing, gnome-shell breaks GDM

[Martin-Éric Racine]

Package: gnome-shell-common
Version: 3.8.4-8.1
Severity: important

Since yesterday, when a bunch of 3.12 components entered testing, GDM stops 
right after loading the background image; it never displays the logon objects.

Grepping syslog reveals that gnome-shell might be at fault:

grep -e \.js -e gdm /var/log/syslog | uniq | grep "Jul 21" > /tmp/foo

Jul 21 11:23:38 suomi systemd[1]: Stopping Session 2 of user Debian-gdm.
Jul 21 11:25:22 suomi gdm3[763]: Starting GNOME Display Manager: gdm3.
Jul 21 11:26:00 suomi systemd[1]: Starting Session 2 of user Debian-gdm.
Jul 21 11:26:00 suomi systemd[1]: Started Session 2 of user Debian-gdm.
Jul 21 11:26:20 suomi gnome-session[1013]: Ikkunointiohjelman varoitus:Log level 16: Attempt to add property Gjs_MonitorConstraint::primary after class was initialised
Jul 21 11:26:20 suomi gnome-session[1013]: Ikkunointiohjelman varoitus:Log level 16: Attempt to add property Gjs_MonitorConstraint::index after class was initialised
Jul 21 11:26:52 suomi gnome-session[1013]: JS ERROR: !!!     fileName = '"/usr/share/gnome-shell/js/misc/loginManager.js"'
Jul 21 11:26:52 suomi gnome-session[1013]: JS ERROR: !!!     stack = '"()@/usr/share/gnome-shell/js/misc/loginManager.js:184

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (1001, 'testing'), (1001, 'oldstable'), (101, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.14-1-686-pae (SMP w/1 CPU core)
Locale: LANG=fi_FI.UTF-8, LC_CTYPE=fi_FI.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnome-shell-common depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.20.0-2

gnome-shell-common recommends no packages.

gnome-shell-common suggests no packages.

-- no debconf information