Fixed ASAN heap-use-after-free handler::ha_index_or_rnd_end

MDEV-16123 ASAN heap-use-after-free handler::ha_index_or_rnd_end MDEV-13828 Segmentation fault on RENAME TABLE Problem was that destructor called methods for closed table. Fixed by removing code in destructor.

Author: montywi

mysql-test/r/statistics_close.result

@@ -0,0 +1,6 @@
+CREATE TABLE t1 (i int);
+RENAME TABLE t1 TO t2;
+FLUSH TABLES;
+DROP TABLE IF EXISTS t1, t2;
+Warnings:
+Note	1051	Unknown table 'test.t1'

mysql-test/t/statistics_close.test

@@ -0,0 +1,18 @@
+#
+# MDEV-16123 ASAN heap-use-after-free handler::ha_index_or_rnd_end
+# MDEV-13828 Segmentation fault on RENAME TABLE
+#
+
+CREATE TABLE t1 (i int);
+--connect (con1,localhost,root,,test)
+--send
+RENAME TABLE t1 TO t2;
+--connection default
+FLUSH TABLES;
+--connection con1
+--reap
+
+# Cleanup
+--disconnect con1
+--connection default
+DROP TABLE IF EXISTS t1, t2;

sql/sql_statistics.cc

@@ -1376,7 +1376,8 @@ class Stat_table_write_iter
 
  ~Stat_table_write_iter()
  {
- cleanup();
+ /* Ensure that cleanup has been run */
+ DBUG_ASSERT(rowid_buf == 0);
  }
 };