MDEV-13861 Assertion `0' failed in Protocol::end_statement

followup for 378beed0 - only count WARN_LEVEL_ERROR,
not warnings or notes.

mysql-test/r/insert.result

@@ -745,3 +745,9 @@ f1	f2
 drop view v1;
 drop table t1;
 SET @@sql_mode= @save_mode;
+CREATE TABLE t1 (f INT);
+CREATE VIEW v1 AS SELECT * FROM t1 WHERE f <=> 'foo' WITH CHECK OPTION;
+REPLACE INTO v1 SET f = NULL;
+ERROR HY000: CHECK OPTION failed 'test.v1'
+DROP VIEW v1;
+DROP TABLE t1;

mysql-test/t/insert.test

@@ -602,3 +602,13 @@ remove_file $MYSQLD_DATADIR/test/t1.txt;
 drop view v1;
 drop table t1;
 SET @@sql_mode= @save_mode;
+
+#
+# MDEV-13861 Assertion `0' failed in Protocol::end_statement
+#
+CREATE TABLE t1 (f INT);
+CREATE VIEW v1 AS SELECT * FROM t1 WHERE f <=> 'foo' WITH CHECK OPTION;
+--error ER_VIEW_CHECK_FAILED
+REPLACE INTO v1 SET f = NULL;
+DROP VIEW v1;
+DROP TABLE t1;

sql/sql_class.h

@@ -1483,7 +1483,8 @@ class Counting_error_handler : public Internal_error_handler
                         const char* msg,
                         Sql_condition ** cond_hdl)
   {
-    errors++;
+    if (level == Sql_condition::WARN_LEVEL_ERROR)
+      errors++;
     return false;
   }
   Counting_error_handler() : errors(0) {}