Add the patch

.gitignore

@@ -3,4 +3,3 @@
 /Text-Balanced-2.05.tar.gz
 /Text-Balanced-2.05_01.tar.gz
 /Text-Balanced-2.06.tar.gz
-/Text-Balanced-2.06-Fix-undefined-unkpos.patch

Text-Balanced-2.06-Fix-undefined-unkpos.patch

@@ -0,0 +1,25 @@
+From 5c87f4b673edad87a64044e7e4d8c3e6776c7c4d Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Michal=20Josef=20=C5=A0pa=C4=8Dek?=
+ <michal.josef.spacek@gmail.com>
+Date: Thu, 23 Feb 2023 19:12:30 +0100
+Subject: [PATCH] Fix undefined $unkpos
+
+RT#146697
+---
+ lib/Text/Balanced.pm | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/lib/Text/Balanced.pm b/lib/Text/Balanced.pm
+index 960609c..aa87898 100644
+--- a/lib/Text/Balanced.pm
++++ b/lib/Text/Balanced.pm
+@@ -1005,7 +1005,8 @@ sub extract_multiple (;$$$$)    # ($text, $functions_ref, $max_fields, $ignoreun
+             {
+                 $unkpos = pos($$textref)-1
+                     unless $igunk || defined $unkpos;
+-                _update_patvalid($textref, substr $$textref, $unkpos, pos($$textref)-$unkpos);
++                _update_patvalid($textref, substr $$textref, defined $unkpos ? $unkpos : 0,
++                                 pos($$textref) - (defined $unkpos ? $unkpos : 0));
+             }
+         }
+ 

sources

@@ -1 +1 @@
-SHA512 (Text-Balanced-2.06-Fix-undefined-unkpos.patch) = 659e85535064e4cb81466ca2edd08df69cfb6803aca04437cc9bce942c3249a4aa15191b27b572f90955b8520a397cc329723ae5d32f32327441f0604949e3b5
+SHA512 (Text-Balanced-2.06.tar.gz) = 17596fb86bb5918390a2a9585dd2ec5312a776ac4e2e28617efe311269f50534e35741c6c4a9162e00b19d6a47f0fe1afa7a65c3861bdcb5412bcdcf5463df62