Fix for LP#702786 "Two handler read f1 next gives different errors"

mysql-test/suite/handler/heap.result:
  New test case
mysql-test/suite/handler/heap.test:
  New test case
sql/sql_handler.cc:
  If we get a fatal error in handler read, end table/index scan as it's likely it was wrongly used (for example not supported feature for index)

mysql-test/suite/handler/heap.result

@@ -772,4 +772,15 @@ HANDLER t1 READ NEXT LIMIT 2;
 ERROR HY000: Record has changed since last read in table 't1'
 HANDLER t1 CLOSE;
 DROP TABLE t1;
-End of 5.1 tests
+create table t1 (f1 integer not null, key (f1)) engine=Memory;
+insert into t1 values (1);
+HANDLER t1 OPEN;
+HANDLER t1 READ f1 NEXT;
+ERROR HY000: Table storage engine for 't1' doesn't have this option
+HANDLER t1 READ f1 NEXT;
+ERROR HY000: Table storage engine for 't1' doesn't have this option
+HANDLER t1 READ f1 NEXT;
+ERROR HY000: Table storage engine for 't1' doesn't have this option
+HANDLER t1 CLOSE;
+DROP TABLE t1;
+End of 5.3 tests

mysql-test/suite/handler/heap.test

@@ -70,4 +70,19 @@ HANDLER t1 CLOSE;
 DROP TABLE t1;
 disconnect con1;
 
---echo End of 5.1 tests
+#
+# LP#702786 Two handler read f1 next gives different errors
+#
+create table t1 (f1 integer not null, key (f1)) engine=Memory;
+insert into t1 values (1);
+HANDLER t1 OPEN;
+--error 1031
+HANDLER t1 READ f1 NEXT;
+--error 1031
+HANDLER t1 READ f1 NEXT;
+--error 1031
+HANDLER t1 READ f1 NEXT;
+HANDLER t1 CLOSE;
+DROP TABLE t1;
+
+--echo End of 5.3 tests

sql/sql_handler.cc

@@ -819,6 +819,7 @@ retry:
                           "table '%s'",
                           error, tables->table_name);
         table->file->print_error(error,MYF(0));
+        table->file->ha_index_or_rnd_end();
         goto err;
       }
       goto ok;