MDEV-19184 Crash in IS_IPV6(_ucs2 0x0031)

mysql-test/main/ctype_ucs.result

@@ -6393,5 +6393,29 @@ SELECT HEX(INET6_ATON('1::1')), HEX(INET6_ATON(CONVERT('1::1' USING ucs2)));
 HEX(INET6_ATON('1::1'))	HEX(INET6_ATON(CONVERT('1::1' USING ucs2)))
 00010000000000000000000000000001	00010000000000000000000000000001
 #
+# MDEV-19184 Crash in IS_IPV6(_ucs2 0x0031)
+#
+SET NAMES utf8;
+SELECT IS_IPV6(_ucs2 0x0031);
+IS_IPV6(_ucs2 0x0031)
+0
+SELECT IS_IPV4(_ucs2 0x0031);
+IS_IPV4(_ucs2 0x0031)
+0
+SELECT IS_IPV6(_ucs2 0x003A003A);
+IS_IPV6(_ucs2 0x003A003A)
+1
+SELECT IS_IPV4(_ucs2 0x00310030002E0030002E0030002E0031);
+IS_IPV4(_ucs2 0x00310030002E0030002E0030002E0031)
+1
+SET NAMES utf8, collation_connection=ucs2_bin;
+SELECT IS_IPV6('::');
+IS_IPV6('::')
+1
+SELECT IS_IPV4('10.0.0.1');
+IS_IPV4('10.0.0.1')
+1
+SET NAMES utf8;
+#
 # End of 10.4 tests
 #

mysql-test/main/ctype_ucs.test

@@ -1105,6 +1105,21 @@ DEALLOCATE PREPARE stmt;
 
 SELECT HEX(INET6_ATON('1::1')), HEX(INET6_ATON(CONVERT('1::1' USING ucs2)));
 
+--echo #
+--echo # MDEV-19184 Crash in IS_IPV6(_ucs2 0x0031)
+--echo #
+
+SET NAMES utf8;
+SELECT IS_IPV6(_ucs2 0x0031);
+SELECT IS_IPV4(_ucs2 0x0031);
+
+SELECT IS_IPV6(_ucs2 0x003A003A);
+SELECT IS_IPV4(_ucs2 0x00310030002E0030002E0030002E0031);
+
+SET NAMES utf8, collation_connection=ucs2_bin;
+SELECT IS_IPV6('::');
+SELECT IS_IPV4('10.0.0.1');
+SET NAMES utf8;
 
 --echo #
 --echo # End of 10.4 tests