MDEV-32844: THD::rli_fake/rgi_fake not cleared on new connection

Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>

mysql-test/suite/sys_vars/r/pseudo_slave_mode_notembedded.result

+'### MDEV-32844: THD::rli_fake/rgi_fake not cleared on new connection'
+connect con1,localhost,root,,;
+BINLOG '
+6ENbZQ8BAAAA/AAAAAABAAAAAAQAMTAuMTEuNi1NYXJpYURCLWRlYnVnLWxvZwAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAADoQ1tlEzgNAAgAEgAEBAQEEgAA5AAEGggAAAAICAgCAAAACgoKAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAEEwQADQgICAoKCgGbvv33
+';
+disconnect con1;
+connect con1,localhost,root,,;
+SET SESSION pseudo_slave_mode= 1;
+disconnect con1;
+connection default;

mysql-test/suite/sys_vars/t/pseudo_slave_mode_notembedded.test

+--source include/not_embedded.inc
+--source include/load_sysvars.inc
+
+--echo '### MDEV-32844: THD::rli_fake/rgi_fake not cleared on new connection'
+--connect(con1,localhost,root,,)
+BINLOG '
+6ENbZQ8BAAAA/AAAAAABAAAAAAQAMTAuMTEuNi1NYXJpYURCLWRlYnVnLWxvZwAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAADoQ1tlEzgNAAgAEgAEBAQEEgAA5AAEGggAAAAICAgCAAAACgoKAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAEEwQADQgICAoKCgGbvv33
+';
+--disconnect con1
+--connect(con1,localhost,root,,)
+# The bug was that the THD::rli_fake was not cleared when the THD is re-used
+# for the new connection, and we would get a warning from the following
+# statement.
+SET SESSION pseudo_slave_mode= 1;
+--disconnect con1
+--connection default

sql/sql_class.cc

@@ -1593,6 +1593,10 @@ void THD::free_connection()
     vio_delete(net.vio);
   net.vio= nullptr;
   net_end(&net);
+  delete(rgi_fake);
+  rgi_fake= NULL;
+  delete(rli_fake);
+  rli_fake= NULL;
 #endif
  if (!cleanup_done)
    cleanup();
@@ -1695,17 +1699,6 @@ THD::~THD()
   dbug_sentry= THD_SENTRY_GONE;
 #endif  
 #ifndef EMBEDDED_LIBRARY
-  if (rgi_fake)
-  {
-    delete rgi_fake;
-    rgi_fake= NULL;
-  }
-  if (rli_fake)
-  {
-    delete rli_fake;
-    rli_fake= NULL;
-  }
-  
   if (rgi_slave)
     rgi_slave->cleanup_after_session();
   my_free(semisync_info);