From: Aquila Macedo <aquilamacedo@riseup.net>
Date: Sat, 8 Nov 2025 00:09:05 +0000 (-0300)
Subject: [PATCH] MDEV-38046 Make func_regexp_pcre tolerant to PCRE2 offset change
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[PATCH] MDEV-38046 Make func_regexp_pcre tolerant to PCRE2 offset change

PCRE2 10.47 reports the invalid escape in 'A\q' at offset 3 instead of 2.
Update the expected result and add a --replace_regex in the test so the
suite passes with both older and newer PCRE2 versions.

Forwarded: https://jira.mariadb.org/browse/MDEV-38046
(accepted upstream, will be in MariaDB 11.8.6+)

Gbp-Pq: Name MDEV-38046-pcre2-offset.patch
---

diff --git a/mysql-test/main/func_regexp_pcre.result b/mysql-test/main/func_regexp_pcre.result
index 4416dfc4c..dff12c663 100644
--- a/mysql-test/main/func_regexp_pcre.result
+++ b/mysql-test/main/func_regexp_pcre.result
@@ -791,7 +791,7 @@ SELECT 'AB' RLIKE 'A# this is a comment\nB';
 1
 SET default_regex_flags=DEFAULT;
 SELECT 'Aq' RLIKE 'A\\q';
-ERROR 42000: Regex error 'unrecognized character follows \ at offset 2'
+ERROR 42000: Regex error 'unrecognized character follows \ at offset 3'
 SET default_regex_flags='EXTRA';
 SELECT 'A' RLIKE 'B';
 'A' RLIKE 'B'
diff --git a/mysql-test/main/func_regexp_pcre.test b/mysql-test/main/func_regexp_pcre.test
index f214ee6db..260a24801 100644
--- a/mysql-test/main/func_regexp_pcre.test
+++ b/mysql-test/main/func_regexp_pcre.test
@@ -382,6 +382,8 @@ SELECT 'AB' RLIKE 'A B';
 SELECT 'AB' RLIKE 'A# this is a comment\nB';
 SET default_regex_flags=DEFAULT;
 
+# pcre2 versions differ in the reported error offset for invalid escapes
+--replace_regex /offset 2/offset 3/
 --error ER_REGEXP_ERROR
 SELECT 'Aq' RLIKE 'A\\q';