diff -Nru ruby-dalli-3.0.6/debian/changelog ruby-dalli-3.0.6/debian/changelog
--- ruby-dalli-3.0.6/debian/changelog	2021-12-07 02:49:10.000000000 +0000
+++ ruby-dalli-3.0.6/debian/changelog	2022-10-15 13:54:27.000000000 +0000
@@ -1,3 +1,10 @@
+ruby-dalli (3.0.6-1.1) unstable; urgency=medium
+
+  * Non-maintainer upload.
+  * Backport upstream fix for FTBFS with Ruby 3.1. (Closes: #1019616)
+
+ -- Adrian Bunk <bunk@debian.org>  Sat, 15 Oct 2022 16:54:27 +0300
+
 ruby-dalli (3.0.6-1) unstable; urgency=medium
 
   * Team upload.
diff -Nru ruby-dalli-3.0.6/debian/patches/0001-Adding-Ruby-3.1-to-CI-workflow-886.patch ruby-dalli-3.0.6/debian/patches/0001-Adding-Ruby-3.1-to-CI-workflow-886.patch
--- ruby-dalli-3.0.6/debian/patches/0001-Adding-Ruby-3.1-to-CI-workflow-886.patch	1970-01-01 00:00:00.000000000 +0000
+++ ruby-dalli-3.0.6/debian/patches/0001-Adding-Ruby-3.1-to-CI-workflow-886.patch	2022-10-15 13:49:18.000000000 +0000
@@ -0,0 +1,46 @@
+From d65244d02babd7aa23a4ea8dd3b3a955393bcbac Mon Sep 17 00:00:00 2001
+From: Peter Goldstein <peter.m.goldstein@gmail.com>
+Date: Sat, 25 Dec 2021 15:34:35 -0800
+Subject: Adding Ruby 3.1 to CI workflow (#886)
+
+* Adding Ruby 3.1 to CI workflow
+
+* Fix rubocop-performance lint issue, make tests compatible with error_highlight
+---
+ test/protocol/test_value_serializer.rb | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/test/protocol/test_value_serializer.rb b/test/protocol/test_value_serializer.rb
+index 436fc9c..0127c18 100644
+--- a/test/protocol/test_value_serializer.rb
++++ b/test/protocol/test_value_serializer.rb
+@@ -228,7 +228,7 @@ describe Dalli::Protocol::ValueSerializer do
+             vs.retrieve(raw_value, Dalli::Protocol::ValueSerializer::FLAG_SERIALIZED)
+           end
+         end
+-        assert_equal exception.message, error_message
++        assert_equal error_message, exception.message
+       end
+     end
+ 
+@@ -244,7 +244,7 @@ describe Dalli::Protocol::ValueSerializer do
+             vs.retrieve(raw_value, Dalli::Protocol::ValueSerializer::FLAG_SERIALIZED)
+           end
+         end
+-        assert_equal exception.message, "Unable to unmarshal value: #{error_message}"
++        assert exception.message.start_with?("Unable to unmarshal value: #{error_message}")
+       end
+     end
+ 
+@@ -259,7 +259,7 @@ describe Dalli::Protocol::ValueSerializer do
+             vs.retrieve(raw_value, Dalli::Protocol::ValueSerializer::FLAG_SERIALIZED)
+           end
+         end
+-        assert_equal exception.message, error_message
++        assert exception.message.start_with?(error_message)
+       end
+     end
+ 
+-- 
+2.30.2
+
diff -Nru ruby-dalli-3.0.6/debian/patches/series ruby-dalli-3.0.6/debian/patches/series
--- ruby-dalli-3.0.6/debian/patches/series	2021-12-07 02:49:10.000000000 +0000
+++ ruby-dalli-3.0.6/debian/patches/series	2022-10-15 13:54:26.000000000 +0000
@@ -2,3 +2,4 @@
 0003-dalli-version.patch
 0004-No-bundler-in-test-helper.patch
 0006-Fix-Dalli-NameError.patch
+0001-Adding-Ruby-3.1-to-CI-workflow-886.patch