MDEV-14983 Wrong error message with SET sql_mode=sha2(ucs2_value)

The problem was fixed earlier. Adding an MTR test only.

mysql-test/main/ctype_ucs.result

@@ -6391,3 +6391,14 @@ DEALLOCATE PREPARE stmt;
 #
 # End of 10.2 tests
 #
+#
+# Start of 10.3 tests
+#
+#
+# MDEV-14983 Wrong error message with SET sql_mode=sha2(ucs2_value)
+#
+SET sql_mode=sha2(CONVERT('a' USING ucs2),0);
+ERROR 42000: Variable 'sql_mode' can't be set to the value of '022a6979e6dab7aa5ae4c3e5e45f7e977112a7e63593820dbec1ec738a24f93c'
+#
+# End of 10.3 tests
+#

mysql-test/main/ctype_ucs.test

@@ -1094,3 +1094,18 @@ DEALLOCATE PREPARE stmt;
 --echo #
 --echo # End of 10.2 tests
 --echo #
+
+--echo #
+--echo # Start of 10.3 tests
+--echo #
+
+--echo #
+--echo # MDEV-14983 Wrong error message with SET sql_mode=sha2(ucs2_value)
+--echo #
+
+--error ER_WRONG_VALUE_FOR_VAR
+SET sql_mode=sha2(CONVERT('a' USING ucs2),0);
+
+--echo #
+--echo # End of 10.3 tests
+--echo #