diff -Nru txt2regex-0.9/debian/changelog txt2regex-0.9/debian/changelog
--- txt2regex-0.9/debian/changelog	2021-12-13 17:04:13.000000000 -0500
+++ txt2regex-0.9/debian/changelog	2022-09-01 17:05:37.000000000 -0400
@@ -1,3 +1,10 @@
+txt2regex (0.9-4ubuntu1) kinetic; urgency=medium
+
+  * d/p/Use-quotes-around-escape_metachar-in-escCharList.patch: Fix
+    autopkgtest regression with bash 5.2 (LP: #1988481).
+
+ -- Nick Rosbrook <nick.rosbrook@canonical.com>  Thu, 01 Sep 2022 17:05:37 -0400
+
 txt2regex (0.9-4) unstable; urgency=medium
 
   * use the dh sequencer in debian/rules (closes: #999059) 
diff -Nru txt2regex-0.9/debian/control txt2regex-0.9/debian/control
--- txt2regex-0.9/debian/control	2020-09-27 08:26:41.000000000 -0400
+++ txt2regex-0.9/debian/control	2022-09-01 16:45:16.000000000 -0400
@@ -1,7 +1,8 @@
 Source: txt2regex
 Section: utils
 Priority: optional
-Maintainer: Rene Engelhard <rene@debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Rene Engelhard <rene@debian.org>
 Build-Depends: debhelper (>> 9), gettext, txt2tags, clitest <!nocheck>
 Standards-Version: 3.6.1
 Homepage: https://github.com/aureliojargas/txt2regex
diff -Nru txt2regex-0.9/debian/patches/series txt2regex-0.9/debian/patches/series
--- txt2regex-0.9/debian/patches/series	2020-09-27 07:43:42.000000000 -0400
+++ txt2regex-0.9/debian/patches/series	2022-09-01 16:43:59.000000000 -0400
@@ -2,3 +2,4 @@
 clitest_and_txt2tags_from_debian.diff
 clitest-show-progress.diff
 de_DE-typo.diff
+Use-quotes-around-escape_metachar-in-escCharList.patch
diff -Nru txt2regex-0.9/debian/patches/Use-quotes-around-escape_metachar-in-escCharList.patch txt2regex-0.9/debian/patches/Use-quotes-around-escape_metachar-in-escCharList.patch
--- txt2regex-0.9/debian/patches/Use-quotes-around-escape_metachar-in-escCharList.patch	1969-12-31 19:00:00.000000000 -0500
+++ txt2regex-0.9/debian/patches/Use-quotes-around-escape_metachar-in-escCharList.patch	2022-09-01 17:05:34.000000000 -0400
@@ -0,0 +1,63 @@
+Description: Use quotes around $escape_metachar in escCharList
+Author: Nick Rosbrook <nick.rosbrook@canonical.com>
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/txt2regex/+bug/1988481
+Forwarded: https://github.com/aureliojargas/txt2regex/pull/12
+Last-Update: 2022-09-01
+---
+From f88d45156ee20c1cdb1e70cb410a4d188a384341 Mon Sep 17 00:00:00 2001
+From: Nick Rosbrook <nick.rosbrook@canonical.com>
+Date: Thu, 1 Sep 2022 16:22:29 -0400
+Subject: [PATCH] Use quotes around $escape_metachar in escCharList
+
+The expression uin="${uin/\\/$escape_metachar$escape_metachar}" has
+different output on bash 5.2 then on earlier versions. Namely,
+$escape_metachar is not treated as a string literal, so the escape
+characters are applied which results in half as many escape chars in the
+output:
+
+  $ bash --version | head -1
+  GNU bash, version 5.2.0(1)-rc2 (x86_64-pc-linux-gnu)
+  $ uin='[\]'; escape_metachar='\\'; echo ${uin/\\/$escape_metachar$escape_metachar}
+  [\\]
+
+  vs.
+
+  $ bash --version | head -1
+  GNU bash, version 5.1.16(1)-release (x86_64-pc-linux-gnu)
+  $ uin='[\]'; escape_metachar='\\'; echo ${uin/\\/$escape_metachar$escape_metachar}
+  [\\\\]
+
+To fix this, add quotes around $escape_metachar in this substitution,
+which works on bash 5.2 as well as earlier versions:
+
+  $ bash --version | head -1
+  GNU bash, version 5.2.0(1)-rc2 (x86_64-pc-linux-gnu)
+  $ uin='[\]'; escape_metachar='\\'; echo ${uin/\\/"$escape_metachar$escape_metachar"}
+  [\\\\]
+
+  and
+
+  $ bash --version | head -1
+  GNU bash, version 5.1.16(1)-release (x86_64-pc-linux-gnu)
+  $ uin='[\]'; escape_metachar='\\'; echo ${uin/\\/"$escape_metachar$escape_metachar"}
+  [\\\\]
+---
+ txt2regex.sh | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/txt2regex.sh b/txt2regex.sh
+index 70a2028..fcf2114 100755
+--- a/txt2regex.sh
++++ b/txt2regex.sh
+@@ -1204,7 +1204,7 @@ escCharList() {
+     # shellcheck disable=SC1003
+     if [ "$(getMeta "ax_${progs[$1]}" 6)" == '\' ]; then
+         escape_metachar=$(getMeta "ax_${progs[$1]}" 4)
+-        uin="${uin/\\/$escape_metachar$escape_metachar}"
++        uin="${uin/\\/"$escape_metachar$escape_metachar"}"
+     fi
+ }
+ 
+-- 
+2.34.1
+