MDEV-19034 ASAN unknown-crash in get_date_time_separator with PAD_CHAR_TO_FULL_LENGTH

mysql-test/r/type_datetime.result

@@ -1156,5 +1156,16 @@ ExtractValue('foo','bar')	i	MIN(d)
 	3	1976-12-14 13:21:07
 DROP TABLE t1;
 #
+# MDEV-19034 ASAN unknown-crash in get_date_time_separator with PAD_CHAR_TO_FULL_LENGTH
+#
+SET SQL_MODE=DEFAULT;
+CREATE OR REPLACE TABLE t1 (a CHAR(11));
+CREATE OR REPLACE TABLE t2 (b DATETIME);
+INSERT INTO t1 VALUES ('2010-02-19') ;
+SET SQL_MODE= 'PAD_CHAR_TO_FULL_LENGTH';
+INSERT INTO t2 SELECT * FROM t1;
+DROP TABLE t1, t2;
+SET SQL_MODE=DEFAULT;
+#
 # End of 10.1 tests
 #

mysql-test/t/type_datetime.test

@@ -710,6 +710,20 @@ INSERT INTO t1 VALUES (3,NULL),(3,'1976-12-14 13:21:07'),(NULL,'1981-09-24 01:04
 SELECT ExtractValue('foo','bar'), i, MIN(d) FROM t1 GROUP BY i;
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-19034 ASAN unknown-crash in get_date_time_separator with PAD_CHAR_TO_FULL_LENGTH
+--echo #
+
+SET SQL_MODE=DEFAULT;
+CREATE OR REPLACE TABLE t1 (a CHAR(11));
+CREATE OR REPLACE TABLE t2 (b DATETIME);
+INSERT INTO t1 VALUES ('2010-02-19') ;
+SET SQL_MODE= 'PAD_CHAR_TO_FULL_LENGTH';
+INSERT INTO t2 SELECT * FROM t1;
+DROP TABLE t1, t2;
+SET SQL_MODE=DEFAULT;
+
+
 --echo #
 --echo # End of 10.1 tests
 --echo #

sql-common/my_time.c

@@ -184,7 +184,7 @@ static int get_date_time_separator(uint *number_of_fields, ulonglong flags,
   do
   {
     s++;
-  } while (my_isspace(&my_charset_latin1, *s));
+  } while (s < end && my_isspace(&my_charset_latin1, *s));
   *str= s;
   return 0;
 }