diff -Nru update-manager-20.10.2/.bzrignore update-manager-20.10.3/.bzrignore
--- update-manager-20.10.2/.bzrignore	2020-04-06 17:20:52.000000000 -0500
+++ update-manager-20.10.3/.bzrignore	1969-12-31 18:00:00.000000000 -0600
@@ -1,11 +0,0 @@
-__pycache__
-debian/*.debhelper*
-debian/*.substvars
-debian/files
-debian/python-update-manager
-debian/python3-update-manager
-debian/tmp
-debian/update-manager
-debian/update-manager-core
-debian/update-manager-kde
-debian/update-manager-text
diff -Nru update-manager-20.10.2/debian/changelog update-manager-20.10.3/debian/changelog
--- update-manager-20.10.2/debian/changelog	2021-01-13 08:35:34.000000000 -0600
+++ update-manager-20.10.3/debian/changelog	2021-01-27 14:14:43.000000000 -0600
@@ -1,3 +1,10 @@
+update-manager (1:20.10.3) groovy; urgency=medium
+
+  * Fix crash caused by adding apt package objects to a list of
+    strings (LP: #1913476)
+
+ -- William 'jawn-smith' Wilson <william.wilson@canonical.com>  Wed, 27 Jan 2021 14:14:43 -0600
+
 update-manager (1:20.10.2) groovy; urgency=medium
 
   * UpdateManager/Core/UpdateList.py: change to a regex from a static list
diff -Nru update-manager-20.10.2/UpdateManager/Core/UpdateList.py update-manager-20.10.3/UpdateManager/Core/UpdateList.py
--- update-manager-20.10.2/UpdateManager/Core/UpdateList.py	2021-01-13 08:35:34.000000000 -0600
+++ update-manager-20.10.3/UpdateManager/Core/UpdateList.py	2021-01-27 14:14:43.000000000 -0600
@@ -437,7 +437,7 @@
             meta_pkgs = [flavor_package, "ubuntu-standard", "ubuntu-minimal"]
             for pkg in cache:
                 if linux_regexp.match(pkg.name):
-                    meta_pkgs.append(pkg)
+                    meta_pkgs.append(pkg.name)
             for pkg in meta_pkgs:
                 if pkg in cache:
                     meta_group.add(cache[pkg])