Stricter enforcement of the LIKE_PATTERN_LENGTH for the regexp extension.

FossilOrigin-Name: c94b1e9c5674f7d0ad75d91085262f38cba6036979e8a0f9d39edc7db841915f

test/regexp1.sql

@@ -0,0 +1,32 @@
+#!sqlite3
+#
+# 2025-12-16
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# Test cases for the oversized patterns in the REGEXP extension found
+# at ext/misc/regexp.c.
+#
+.mode list
+.testcase 100
+--                       0         1         2         3         4
+--                        123456789 123456789 123456789 123456789 123
+SELECT 'abcdefg' REGEXP '((((((((((((((((((abcdefg))))))))))))))))))';
+.check "1\n"
+
+.limit like_pattern_length 42
+.testcase 110
+SELECT 'abcdefg' REGEXP '((((((((((((((((((abcdefg))))))))))))))))))';
+.check -glob "Error near line #: REGEXP pattern too big*"
+
+.limit like_pattern_length 43
+.testcase 120
+SELECT 'abcdefg' REGEXP '((((((((((((((((((abcdefg))))))))))))))))))';
+.check "1\n"

test/shellB.test

@@ -42,5 +42,6 @@ proc do_clitest {name} {
 do_clitest modeA.sql
 do_clitest dblwidth-a.sql
 do_clitest vt100-a.sql
+do_clitest regexp1.sql
 
 finish_test