diff -Nru gtk+3.0-3.12.2/debian/changelog gtk+3.0-3.12.2/debian/changelog
--- gtk+3.0-3.12.2/debian/changelog	2014-10-01 12:41:43.000000000 -0300
+++ gtk+3.0-3.12.2/debian/changelog	2014-10-02 10:21:17.000000000 -0300
@@ -1,3 +1,11 @@
+gtk+3.0 (3.12.2-0ubuntu11) utopic; urgency=medium
+
+  * debian/patches/printing-property-initialize-auth_info.patch
+    - Fix to an upstream bug:
+      https://bugzilla.gnome.org/show_bug.cgi?id=737777
+
+ -- Dariusz Gadomski <dariusz.gadomski@canonical.com>  Thu, 02 Oct 2014 15:20:37 +0200
+
 gtk+3.0 (3.12.2-0ubuntu10) utopic; urgency=medium
 
   [ Lars Uebernickel ]
diff -Nru gtk+3.0-3.12.2/debian/patches/printing-property-initialize-auth_info.patch gtk+3.0-3.12.2/debian/patches/printing-property-initialize-auth_info.patch
--- gtk+3.0-3.12.2/debian/patches/printing-property-initialize-auth_info.patch	1969-12-31 21:00:00.000000000 -0300
+++ gtk+3.0-3.12.2/debian/patches/printing-property-initialize-auth_info.patch	2014-10-02 10:24:41.000000000 -0300
@@ -0,0 +1,24 @@
+Description: Properly initialize auth_info in gtkprintbackend.c
+ auth_info should be a NULL-terminated array as it is used in
+ e.g. g_strdupv invocations iterating over its elements until
+ a NULL element is encountered.
+ .
+ gtk+3.0 (3.12.2-0ubuntu11) utopic; urgency=medium
+ .
+   * debian/patches/printing-property-initialize-auth_info.patch
+     - Fix to an upstream bug:
+       https://bugzilla.gnome.org/show_bug.cgi?id=737777
+Author: Dariusz Gadomski <dariusz.gadomski@canonical.com>
+Bug: https://bugzilla.gnome.org/show_bug.cgi?id=737777
+
+--- gtk+3.0-3.12.2.orig/gtk/gtkprintbackend.c
++++ gtk+3.0-3.12.2/gtk/gtkprintbackend.c
+@@ -756,7 +756,7 @@ request_password (GtkPrintBackend  *back
+ 
+   priv->auth_info_required = g_strdupv (ai_required);
+   length = g_strv_length (ai_required);
+-  priv->auth_info = g_new0 (gchar *, length);
++  priv->auth_info = g_new0 (gchar *, length + 1);
+   priv->store_auth_info = FALSE;
+ 
+   dialog = gtk_dialog_new_with_buttons ( _("Authentication"), NULL, GTK_DIALOG_MODAL, 
diff -Nru gtk+3.0-3.12.2/debian/patches/series gtk+3.0-3.12.2/debian/patches/series
--- gtk+3.0-3.12.2/debian/patches/series	2014-10-01 12:41:43.000000000 -0300
+++ gtk+3.0-3.12.2/debian/patches/series	2014-10-02 10:23:16.000000000 -0300
@@ -26,3 +26,4 @@
 0001-Disable-deprecation-warnings-in-tests.patch
 0001-Fight-deprecation-warnings-in-test.patch
 use-secrets-service-for-cups-auth_info.patch
+printing-property-initialize-auth_info.patch