diff -Nru xdg-utils-1.1.3/debian/changelog xdg-utils-1.1.3/debian/changelog
--- xdg-utils-1.1.3/debian/changelog	2018-07-01 06:59:06.000000000 +0000
+++ xdg-utils-1.1.3/debian/changelog	2018-10-02 10:11:16.000000000 +0000
@@ -1,3 +1,11 @@
+xdg-utils (1.1.3-1ubuntu2) cosmic; urgency=medium
+
+  * Use perl's decode() to ensure we don't pass invalid UTF-8 to D-Bus, as
+    doing so triggers an assertion from libdbus which makes us crash. LP:
+    #1743216 (Debian #910070, Upstream #108121)
+
+ -- Iain Lane <iain@orangesquash.org.uk>  Tue, 02 Oct 2018 11:11:16 +0100
+
 xdg-utils (1.1.3-1ubuntu1) cosmic; urgency=low
 
   * Merge from Debian Sid (LP: #1779529). Remaining changes:
diff -Nru xdg-utils-1.1.3/debian/patches/debian-changes xdg-utils-1.1.3/debian/patches/debian-changes
--- xdg-utils-1.1.3/debian/patches/debian-changes	2018-07-01 06:59:06.000000000 +0000
+++ xdg-utils-1.1.3/debian/patches/debian-changes	2018-10-02 10:11:16.000000000 +0000
@@ -99,3 +99,24 @@
          fi
  
          if [ $? -eq 0 ]; then
+--- xdg-utils-1.1.3.orig/scripts/xdg-screensaver.in
++++ xdg-utils-1.1.3/scripts/xdg-screensaver.in
+@@ -468,6 +468,7 @@ screensaver_gnome_screensaver()
+         perl -e '
+ use strict;
+ use warnings;
++use Encode qw(decode);
+ use IO::File;
+ use Net::DBus;
+ use X11::Protocol;
+@@ -489,6 +490,10 @@ while (1) {
+   }
+ }
+ 
++# Replace any invalid unicode characters with U+FFFD, so we dont crash when we
++# pass them over to D-Bus
++$window_name = decode("utf8", $window_name, Encode::FB_DEFAULT);
++
+ # Inhibit idle detection (flags = 8) with window name and ID.
+ # We have no reason so just send the window name again.
+ my $bus = Net::DBus->session();