debian/changelog

 piuparts (0.92) UNRELEASED; urgency=medium
 
+  [ Holger Levsen ]
   * Update TODO.
   * Update several URLs pointing to https://www.debian.org/doc/debian-policy
     to match the new URLs since debian-policy 4.1.0.
@@ -7,6 +8,11 @@ piuparts (0.92) UNRELEASED; urgency=medium
     packages in sid more often: set reschedule-old-count = 666 and
     reschedule-old-days = 66.
 
+  [ Simon McVittie ]
+  * piuparts.py:
+    - Add to ignored_files:
+      + /var/lib/dpkg/lock-frontend (Closes: #909182)
+
  -- Holger Levsen <holger@debian.org>  Fri, 07 Sep 2018 19:55:01 +0200
 
 piuparts (0.91) unstable; urgency=medium

piuparts.py

@@ -295,6 +295,7 @@ class Settings:
             "/var/lib/dpkg/diversions",
             "/var/lib/dpkg/diversions-old",
             "/var/lib/dpkg/lock",
+            "/var/lib/dpkg/lock-frontend",
             "/var/lib/dpkg/status",
             "/var/lib/dpkg/status-old",
             "/var/lib/dpkg/statoverride",