diff --git a/mysql-test/lib/mtr_process.pl b/mysql-test/lib/mtr_process.pl
index e47b0e4287c..42dd8f8d331 100644
--- a/mysql-test/lib/mtr_process.pl
+++ b/mysql-test/lib/mtr_process.pl
@@ -25,7 +25,28 @@ sub sleep_until_file_created ($$$);
 sub mtr_kill_processes ($);
 sub mtr_ping_with_timeout($);
 sub mtr_ping_port ($);
-sub mtr_kill_process ($$$);
+
+# Private IM-related operations.
+
+sub mtr_im_kill_process ($$$);
+sub mtr_im_load_pids ($);
+sub mtr_im_terminate ($);
+sub mtr_im_check_alive ($);
+sub mtr_im_check_main_alive ($);
+sub mtr_im_check_angel_alive ($);
+sub mtr_im_check_mysqlds_alive ($);
+sub mtr_im_check_mysqld_alive ($$);
+sub mtr_im_cleanup ($);
+sub mtr_im_rm_file ($);
+sub mtr_im_errlog ($);
+sub mtr_im_kill ($);
+sub mtr_im_wait_for_connection ($$$);
+sub mtr_im_wait_for_mysqld($$$);
+
+# Public IM-related operations.
+
+sub mtr_im_start ($$);
+sub mtr_im_stop ($$);
 
 # static in C
 sub spawn_impl ($$$$$$$$);
@@ -335,16 +356,27 @@ sub mtr_process_exit_status {
 # kill IM manager first, else it will restart the servers
 sub mtr_kill_leftovers () {
 
+  mtr_debug("mtr_kill_leftovers(): started.");
+
+  mtr_im_stop($::instance_manager, 'mtr_kill_leftovers');
+
+  # Start shutdown of masters and slaves. Don't touch IM-managed mysqld
+  # instances -- they should be stopped by mtr_im_stop().
+
+  mtr_debug("Shutting down mysqld-instances...");
+
   my @kill_pids;
   my %admin_pids;
-  my $pid;
 
-  #Start shutdown of instance_managers, masters and slaves
-  foreach my $srv ($::instance_manager,
-		   @{$::instance_manager->{'instances'}},
-		   @{$::master},@{$::slave})
+  foreach my $srv (@{$::master}, @{$::slave})
   {
-    $pid= mtr_mysqladmin_start($srv, "shutdown", 70);
+    mtr_debug("  - mysqld " .
+              "(pid: $srv->{pid}; " .
+              "pid file: '$srv->{path_pid}'; " .
+              "socket: '$srv->{path_sock}'; ".
+              "port: $srv->{port})");
+
+    my $pid= mtr_mysqladmin_start($srv, "shutdown", 70);
 
     # Save the pid of the mysqladmin process
     $admin_pids{$pid}= 1;
@@ -358,10 +390,17 @@ sub mtr_kill_leftovers () {
     $srv->{'pid'}= 0; # Assume we are done with it
   }
 
-  # Start shutdown of clusters
+  # Start shutdown of clusters.
+
+  mtr_debug("Shutting down cluster...");
+
   foreach my $cluster (@{$::clusters})
   {
-    $pid= mtr_ndbmgm_start($cluster, "shutdown");
+    mtr_debug("  - cluster " .
+              "(pid: $cluster->{pid}; " .
+              "pid file: '$cluster->{path_pid})");
+
+    my $pid= mtr_ndbmgm_start($cluster, "shutdown");
 
     # Save the pid of the ndb_mgm process
     $admin_pids{$pid}= 1;
@@ -376,13 +415,16 @@ sub mtr_kill_leftovers () {
 
     foreach my $ndbd (@{$cluster->{'ndbds'}})
     {
+      mtr_debug("    - ndbd " .
+                "(pid: $ndbd->{pid}; " .
+                "pid file: '$ndbd->{path_pid})");
+
       push(@kill_pids,{
 		       pid      => $ndbd->{'pid'},
 		       pidfile  => $ndbd->{'path_pid'},
 		      });
       $ndbd->{'pid'}= 0; # Assume we are done with it
     }
-
   }
 
   # Wait for all the admin processes to complete
@@ -411,6 +453,8 @@ sub mtr_kill_leftovers () {
   # FIXME $path_run_dir or something
   my $rundir= "$::opt_vardir/run";
 
+  mtr_debug("Processing PID files in directory '$rundir'...");
+
   if ( -d $rundir )
   {
     opendir(RUNDIR, $rundir)
@@ -424,8 +468,12 @@ sub mtr_kill_leftovers () {
 
       if ( -f $pidfile )
       {
+        mtr_debug("Processing PID file: '$pidfile'...");
+
         my $pid= mtr_get_pid_from_file($pidfile);
 
+        mtr_debug("Got pid: $pid from file '$pidfile'");
+
         # Race, could have been removed between I tested with -f
         # and the unlink() below, so I better check again with -f
 
@@ -436,14 +484,24 @@ sub mtr_kill_leftovers () {
 
         if ( $::glob_cygwin_perl or kill(0, $pid) )
         {
+          mtr_debug("There is process with pid $pid -- scheduling for kill.");
           push(@pids, $pid);            # We know (cygwin guess) it exists
         }
+        else
+        {
+          mtr_debug("There is no process with pid $pid -- skipping.");
+        }
       }
     }
     closedir(RUNDIR);
 
     if ( @pids )
     {
+      mtr_debug("Killing the following processes with PID files: " .
+                join(' ', @pids) . "...");
+
+      start_reap_all();
+
       if ( $::glob_cygwin_perl )
       {
         # We have no (easy) way of knowing the Cygwin controlling
@@ -457,6 +515,7 @@ sub mtr_kill_leftovers () {
         my $retries= 10;                    # 10 seconds
         do
         {
+          mtr_debug("Sending SIGKILL to pids: " . join(' ', @pids));
           kill(9, @pids);
           mtr_report("Sleep 1 second waiting for processes to die");
           sleep(1)                      # Wait one second
@@ -467,12 +526,20 @@ sub mtr_kill_leftovers () {
           mtr_warning("can't kill process(es) " . join(" ", @pids));
         }
       }
+
+      stop_reap_all();
     }
   }
+  else
+  {
+    mtr_debug("Directory for PID files ($rundir) does not exist.");
+  }
 
   # We may have failed everything, but we now check again if we have
   # the listen ports free to use, and if they are free, just go for it.
 
+  mtr_debug("Checking known mysqld servers...");
+
   foreach my $srv ( @kill_pids )
   {
     if ( defined $srv->{'port'} and mtr_ping_port($srv->{'port'}) )
@@ -480,6 +547,8 @@ sub mtr_kill_leftovers () {
       mtr_warning("can't kill old process holding port $srv->{'port'}");
     }
   }
+
+  mtr_debug("mtr_kill_leftovers(): finished.");
 }
 
 
@@ -736,6 +805,9 @@ sub mtr_ping_with_timeout($) {
   my $res= 1;                           # If we just fall through, we are done
                                         # in the sense that the servers don't
                                         # listen to their ports any longer
+
+  mtr_debug("Waiting for mysqld servers to stop...");
+
  TIME:
   while ( $timeout-- )
   {
@@ -763,7 +835,14 @@ sub mtr_ping_with_timeout($) {
     last;                               # If we got here, we are done
   }
 
-  $timeout or mtr_report("At least one server is still listening to its port");
+  if ($res)
+  {
+    mtr_debug("mtr_ping_with_timeout(): All mysqld instances are down.");
+  }
+  else
+  {
+    mtr_report("mtr_ping_with_timeout(): At least one server is alive.");
+  }
 
   return $res;
 }
@@ -946,6 +1025,9 @@ sub mtr_ping_port ($) {
   {
     mtr_error("can't create socket: $!");
   }
+
+  mtr_debug("Pinging server (port: $port)...");
+
   if ( connect(SOCK, $paddr) )
   {
     close(SOCK);                        # FIXME check error?
@@ -1016,34 +1098,12 @@ sub mtr_kill_processes ($) {
   {
     foreach my $sig (15, 9)
     {
-      last if mtr_kill_process($pid, $sig, 10);
+      last if mtr_im_kill_process([ $pid ], $sig, 10);
     }
   }
 }
 
 
-sub mtr_kill_process ($$$) {
-  my $pid= shift;
-  my $signal= shift;
-  my $timeout= shift; # Seconds to wait for process
-  my $max_loop= $timeout*10; # Sleeping 0.1 between each kill attempt
-
-  for (my $cur_attempt= 1; $cur_attempt <= $max_loop; ++$cur_attempt)
-  {
-    mtr_debug("Sending $signal to $pid...");
-
-    kill($signal, $pid);
-
-    last unless kill (0, $pid) and $max_loop--;
-
-    mtr_verbose("Sleep 0.1 second waiting for processes $pid to die");
-
-    select(undef, undef, undef, 0.1);
-  }
-
-  return $max_loop;
-}
-
 ##############################################################################
 #
 #  When we exit, we kill off all children
@@ -1073,4 +1133,679 @@ sub mtr_exit ($) {
   exit($code);
 }
 
+##############################################################################
+#
+#  Instance Manager management routines.
+#
+##############################################################################
+
+sub mtr_im_kill_process ($$$) {
+  my $pid_lst= shift;
+  my $signal= shift;
+  my $timeout= shift;
+  my $total_attempts= $timeout * 10;
+
+  my %pids;
+
+  foreach my $pid (@{$pid_lst})
+  {
+    $pids{$pid}= 1;
+  }
+
+  for (my $cur_attempt= 1; $cur_attempt <= $total_attempts; ++$cur_attempt)
+  {
+    foreach my $pid (keys %pids)
+    {
+      mtr_debug("Sending $signal to $pid...");
+
+      kill($signal, $pid);
+
+      unless (kill (0, $pid))
+      {
+        mtr_debug("Process $pid died.");
+        delete $pids{$pid};
+      }
+    }
+
+    return if scalar keys %pids == 0;
+
+    mtr_debug("Sleeping 100ms waiting for processes to die...");
+
+    select(undef, undef, undef, 0.1);
+  }
+
+  mtr_debug("Process(es) " .
+            join(' ', keys %pids) .
+            " is still alive after $total_attempts " .
+            "of sending signal $signal.");
+}
+
+###########################################################################
+
+sub mtr_im_load_pids($) {
+  my $instance_manager= shift;
+
+  mtr_debug("Loading PID files...");
+
+  # Obtain mysqld-process pids.
+
+  my $instances = $instance_manager->{'instances'};
+
+  for (my $idx= 0; $idx < 2; ++$idx)
+  {
+    mtr_debug("IM-guarded mysqld[$idx] PID file: '" .
+              $instances->[$idx]->{'path_pid'} . "'.");
+
+    my $mysqld_pid;
+
+    if (-r $instances->[$idx]->{'path_pid'})
+    {
+      $mysqld_pid= mtr_get_pid_from_file($instances->[$idx]->{'path_pid'});
+      mtr_debug("IM-guarded mysqld[$idx] PID: $mysqld_pid.");
+    }
+    else
+    {
+      $mysqld_pid= undef;
+      mtr_debug("IM-guarded mysqld[$idx]: no PID file.");
+    }
+
+    $instances->[$idx]->{'pid'}= $mysqld_pid;
+  }
+
+  # Re-read Instance Manager PIDs from the file, since during tests Instance
+  # Manager could have been restarted, so its PIDs could have been changed.
+
+  #   - IM-main
+
+  mtr_debug("IM-main PID file: '$instance_manager->{path_pid}'.");
+
+  if (-f $instance_manager->{'path_pid'})
+  {
+    $instance_manager->{'pid'} =
+      mtr_get_pid_from_file($instance_manager->{'path_pid'});
+
+    mtr_debug("IM-main PID: $instance_manager->{pid}.");
+  }
+  else
+  {
+    mtr_debug("IM-main: no PID file.");
+    $instance_manager->{'pid'}= undef;
+  }
+
+  #   - IM-angel
+
+  mtr_debug("IM-angel PID file: '$instance_manager->{path_angel_pid}'.");
+
+  if (-f $instance_manager->{'path_angel_pid'})
+  {
+    $instance_manager->{'angel_pid'} =
+      mtr_get_pid_from_file($instance_manager->{'path_angel_pid'});
+
+    mtr_debug("IM-angel PID: $instance_manager->{'angel_pid'}.");
+  }
+  else
+  {
+    mtr_debug("IM-angel: no PID file.");
+    $instance_manager->{'angel_pid'} = undef;
+  }
+}
+
+###########################################################################
+
+sub mtr_im_terminate($) {
+  my $instance_manager= shift;
+
+  # Load pids from pid-files. We should do it first of all, because IM deletes
+  # them on shutdown.
+
+  mtr_im_load_pids($instance_manager);
+
+  mtr_debug("Shutting Instance Manager down...");
+
+  # Ignoring SIGCHLD so that all children could rest in peace.
+
+  start_reap_all();
+
+  # Send SIGTERM to IM-main.
+
+  if (defined $instance_manager->{'pid'})
+  {
+    mtr_debug("IM-main pid: $instance_manager->{pid}.");
+    mtr_debug("Stopping IM-main...");
+
+    mtr_im_kill_process([ $instance_manager->{'pid'} ], 'TERM', 10);
+  }
+  else
+  {
+    mtr_debug("IM-main pid: n/a.");
+  }
+
+  # If IM-angel was alive, wait for it to die.
+
+  if (defined $instance_manager->{'angel_pid'})
+  {
+    mtr_debug("IM-angel pid: $instance_manager->{'angel_pid'}.");
+    mtr_debug("Waiting for IM-angel to die...");
+
+    my $total_attempts= 10;
+
+    for (my $cur_attempt=1; $cur_attempt <= $total_attempts; ++$cur_attempt)
+    {
+      unless (kill (0, $instance_manager->{'angel_pid'}))
+      {
+        mtr_debug("IM-angel died.");
+        last;
+      }
+
+      sleep(1);
+    }
+  }
+  else
+  {
+    mtr_debug("IM-angel pid: n/a.");
+  }
+
+  stop_reap_all();
+
+  # Re-load PIDs.
+
+  mtr_im_load_pids($instance_manager);
+}
+
+###########################################################################
+
+sub mtr_im_check_alive($) {
+  my $instance_manager= shift;
+
+  mtr_debug("Checking whether IM-components are alive...");
+
+  return 1 if mtr_im_check_main_alive($instance_manager);
+
+  return 1 if mtr_im_check_angel_alive($instance_manager);
+
+  return 1 if mtr_im_check_mysqlds_alive($instance_manager);
+
+  return 0;
+}
+
+###########################################################################
+
+sub mtr_im_check_main_alive($) {
+  my $instance_manager= shift;
+
+  # Check that the process, that we know to be IM's, is dead.
+
+  if (defined $instance_manager->{'pid'})
+  {
+    if (kill (0, $instance_manager->{'pid'}))
+    {
+      mtr_debug("IM-main (PID: $instance_manager->{pid}) is alive.");
+      return 1;
+    }
+    else
+    {
+      mtr_debug("IM-main (PID: $instance_manager->{pid}) is dead.");
+    }
+  }
+  else
+  {
+    mtr_debug("No PID file for IM-main.");
+  }
+
+  # Check that IM does not accept client connections.
+
+  if (mtr_ping_port($instance_manager->{'port'}))
+  {
+    mtr_debug("IM-main (port: $instance_manager->{port}) " .
+              "is accepting connections.");
+
+    mtr_im_errlog("IM-main is accepting connections on port " .
+                  "$instance_manager->{port}, but there is no " .
+                  "process information.");
+    return 1;
+  }
+  else
+  {
+    mtr_debug("IM-main (port: $instance_manager->{port}) " .
+              "does not accept connections.");
+    return 0;
+  }
+}
+
+###########################################################################
+
+sub mtr_im_check_angel_alive($) {
+  my $instance_manager= shift;
+
+  # Check that the process, that we know to be the Angel, is dead.
+
+  if (defined $instance_manager->{'angel_pid'})
+  {
+    if (kill (0, $instance_manager->{'angel_pid'}))
+    {
+      mtr_debug("IM-angel (PID: $instance_manager->{angel_pid}) is alive.");
+      return 1;
+    }
+    else
+    {
+      mtr_debug("IM-angel (PID: $instance_manager->{angel_pid}) is dead.");
+      return 0;
+    }
+  }
+  else
+  {
+    mtr_debug("No PID file for IM-angel.");
+    return 0;
+  }
+}
+
+###########################################################################
+
+sub mtr_im_check_mysqlds_alive($) {
+  my $instance_manager= shift;
+
+  mtr_debug("Checking for IM-guarded mysqld instances...");
+
+  my $instances = $instance_manager->{'instances'};
+
+  for (my $idx= 0; $idx < 2; ++$idx)
+  {
+    mtr_debug("Checking mysqld[$idx]...");
+
+    return 1
+      if mtr_im_check_mysqld_alive($instance_manager, $instances->[$idx]);
+  }
+}
+
+###########################################################################
+
+sub mtr_im_check_mysqld_alive($$) {
+  my $instance_manager= shift;
+  my $mysqld_instance= shift;
+
+  # Check that the process is dead.
+
+  if (defined $instance_manager->{'pid'})
+  {
+    if (kill (0, $instance_manager->{'pid'}))
+    {
+      mtr_debug("Mysqld instance (PID: $mysqld_instance->{pid}) is alive.");
+      return 1;
+    }
+    else
+    {
+      mtr_debug("Mysqld instance (PID: $mysqld_instance->{pid}) is dead.");
+    }
+  }
+  else
+  {
+    mtr_debug("No PID file for mysqld instance.");
+  }
+
+  # Check that mysqld does not accept client connections.
+
+  if (mtr_ping_port($mysqld_instance->{'port'}))
+  {
+    mtr_debug("Mysqld instance (port: $mysqld_instance->{port}) " .
+              "is accepting connections.");
+
+    mtr_im_errlog("Mysqld is accepting connections on port " .
+                  "$mysqld_instance->{port}, but there is no " .
+                  "process information.");
+    return 1;
+  }
+  else
+  {
+    mtr_debug("Mysqld instance (port: $mysqld_instance->{port}) " .
+              "does not accept connections.");
+    return 0;
+  }
+}
+
+###########################################################################
+
+sub mtr_im_cleanup($) {
+  my $instance_manager= shift;
+
+  mtr_im_rm_file($instance_manager->{'path_pid'});
+  mtr_im_rm_file($instance_manager->{'path_sock'});
+
+  mtr_im_rm_file($instance_manager->{'path_angel_pid'});
+
+  for (my $idx= 0; $idx < 2; ++$idx)
+  {
+    mtr_im_rm_file($instance_manager->{'instances'}->[$idx]->{'path_pid'});
+    mtr_im_rm_file($instance_manager->{'instances'}->[$idx]->{'path_sock'});
+  }
+}
+
+###########################################################################
+
+sub mtr_im_rm_file($)
+{
+  my $file_path= shift;
+
+  if (-f $file_path)
+  {
+    mtr_debug("Removing '$file_path'...");
+
+    mtr_warning("Can not remove '$file_path'.")
+      unless unlink($file_path);
+  }
+  else
+  {
+    mtr_debug("File '$file_path' does not exist already.");
+  }
+}
+
+###########################################################################
+
+sub mtr_im_errlog($) {
+  my $msg= shift;
+
+  # Complain in error log so that a warning will be shown.
+  # 
+  # TODO: unless BUG#20761 is fixed, we will print the warning to stdout, so
+  # that it can be seen on console and does not produce pushbuild error.
+
+  # my $errlog= "$opt_vardir/log/mysql-test-run.pl.err";
+  # 
+  # open (ERRLOG, ">>$errlog") ||
+  #   mtr_error("Can not open error log ($errlog)");
+  # 
+  # my $ts= localtime();
+  # print ERRLOG
+  #   "Warning: [$ts] $msg\n";
+  # 
+  # close ERRLOG;
+
+  my $ts= localtime();
+  print "Warning: [$ts] $msg\n";
+}
+
+###########################################################################
+
+sub mtr_im_kill($) {
+  my $instance_manager= shift;
+
+  # Re-load PIDs. That can be useful because some processes could have been
+  # restarted.
+
+  mtr_im_load_pids($instance_manager);
+
+  # Ignoring SIGCHLD so that all children could rest in peace.
+
+  start_reap_all();
+
+  # Kill IM-angel first of all.
+
+  if (defined $instance_manager->{'angel_pid'})
+  {
+    mtr_debug("Killing IM-angel (PID: $instance_manager->{angel_pid})...");
+    mtr_im_kill_process([ $instance_manager->{'angel_pid'} ], 'KILL', 10);
+  }
+  else
+  {
+    mtr_debug("IM-angel is dead.");
+  }
+
+  # Re-load PIDs again.
+
+  mtr_im_load_pids($instance_manager);
+
+  # Kill IM-main.
+  
+  if (defined $instance_manager->{'pid'})
+  {
+    mtr_debug("Killing IM-main (PID: $instance_manager->pid})...");
+    mtr_im_kill_process([ $instance_manager->{'pid'} ], 'KILL', 10);
+  }
+  else
+  {
+    mtr_debug("IM-main is dead.");
+  }
+
+  # Re-load PIDs again.
+
+  mtr_im_load_pids($instance_manager);
+
+  # Kill guarded mysqld instances.
+
+  my @mysqld_pids;
+
+  mtr_debug("Collecting PIDs of mysqld instances to kill...");
+
+  for (my $idx= 0; $idx < 2; ++$idx)
+  {
+    my $pid= $instance_manager->{'instances'}->[$idx]->{'pid'};
+
+    next unless defined $pid;
+
+    mtr_debug("  - IM-guarded mysqld[$idx] PID: $pid.");
+
+    push (@mysqld_pids, $pid);
+  }
+
+  if (scalar @mysqld_pids > 0)
+  {
+    mtr_debug("Killing IM-guarded mysqld instances...");
+    mtr_im_kill_process(\@mysqld_pids, 'KILL', 10);
+  }
+
+  # That's all.
+
+  stop_reap_all();
+}
+
+##############################################################################
+
+sub mtr_im_wait_for_connection($$$) {
+  my $instance_manager= shift;
+  my $total_attempts= shift;
+  my $connect_timeout= shift;
+
+  mtr_debug("Waiting for IM on port $instance_manager->{port} " .
+            "to start accepting connections...");
+
+  for (my $cur_attempt= 1; $cur_attempt <= $total_attempts; ++$cur_attempt)
+  {
+    mtr_debug("Trying to connect to IM ($cur_attempt of $total_attempts)...");
+
+    if (mtr_ping_port($instance_manager->{'port'}))
+    {
+      mtr_debug("IM is accepting connections " .
+                "on port $instance_manager->{port}.");
+      return 1;
+    }
+
+    mtr_debug("Sleeping $connect_timeout...");
+    sleep($connect_timeout);
+  }
+
+  mtr_debug("IM does not accept connections " .
+            "on port $instance_manager->{port} after " .
+            ($total_attempts * $connect_timeout) . " seconds.");
+
+  return 0;
+}
+
+##############################################################################
+
+sub mtr_im_wait_for_mysqld($$$) {
+  my $mysqld= shift;
+  my $total_attempts= shift;
+  my $connect_timeout= shift;
+
+  mtr_debug("Waiting for IM-guarded mysqld on port $mysqld->{port} " .
+            "to start accepting connections...");
+
+  for (my $cur_attempt= 1; $cur_attempt <= $total_attempts; ++$cur_attempt)
+  {
+    mtr_debug("Trying to connect to mysqld " .
+              "($cur_attempt of $total_attempts)...");
+
+    if (mtr_ping_port($mysqld->{'port'}))
+    {
+      mtr_debug("Mysqld is accepting connections " .
+                "on port $mysqld->{port}.");
+      return 1;
+    }
+
+    mtr_debug("Sleeping $connect_timeout...");
+    sleep($connect_timeout);
+  }
+
+  mtr_debug("Mysqld does not accept connections " .
+            "on port $mysqld->{port} after " .
+            ($total_attempts * $connect_timeout) . " seconds.");
+
+  return 0;
+}
+
+##############################################################################
+
+sub mtr_im_start($$) {
+  my $instance_manager = shift;
+  my $opts = shift;
+
+  mtr_debug("Starting Instance Manager...");
+
+  my $args;
+  mtr_init_args(\$args);
+  mtr_add_arg($args, "--defaults-file=%s",
+              $instance_manager->{'defaults_file'});
+
+  foreach my $opt (@{$opts})
+  {
+    mtr_add_arg($args, $opt);
+  }
+
+  $instance_manager->{'pid'} =
+    mtr_spawn(
+      $::exe_im,                        # path to the executable
+      $args,                            # cmd-line args
+      '',                               # stdin
+      $instance_manager->{'path_log'},  # stdout
+      $instance_manager->{'path_err'},  # stderr
+      '',                               # pid file path (not used)
+      { append_log_file => 1 }          # append log files
+      );
+
+  if ( ! $instance_manager->{'pid'} )
+  {
+    mtr_report('Could not start Instance Manager');
+    return;
+  }
+
+  # Instance Manager can be run in daemon mode. In this case, it creates
+  # several processes and the parent process, created by mtr_spawn(), exits just
+  # after start. So, we have to obtain Instance Manager PID from the PID file.
+
+  if ( ! sleep_until_file_created(
+                                  $instance_manager->{'path_pid'},
+                                  $instance_manager->{'start_timeout'},
+                                  -1)) # real PID is still unknown
+  {
+    mtr_report("Instance Manager PID file is missing");
+    return;
+  }
+
+  $instance_manager->{'pid'} =
+    mtr_get_pid_from_file($instance_manager->{'path_pid'});
+
+  mtr_debug("Instance Manager started. PID: $instance_manager->{pid}.");
+
+  # Wait until we can connect to IM.
+
+  my $IM_CONNECT_TIMEOUT= 30;
+
+  unless (mtr_im_wait_for_connection($instance_manager,
+                                     $IM_CONNECT_TIMEOUT, 1))
+  {
+    mtr_debug("Can not connect to Instance Manager " .
+              "in $IM_CONNECT_TIMEOUT seconds after start.");
+    mtr_debug("Aborting test suite...");
+
+    mtr_kill_leftovers();
+
+    mtr_error("Can not connect to Instance Manager " .
+              "in $IM_CONNECT_TIMEOUT seconds after start.");
+  }
+
+  # Wait until we can connect to guarded mysqld-instances
+  # (in other words -- wait for IM to start guarded instances).
+
+  for (my $idx= 0; $idx < 2; ++$idx)
+  {
+    my $mysqld= $instance_manager->{'instances'}->[$idx];
+
+    next if exists $mysqld->{'nonguarded'};
+
+    mtr_debug("Waiting for mysqld[$idx] to start...");
+
+    unless (mtr_im_wait_for_mysqld($mysqld, 30, 1))
+    {
+      mtr_debug("Can not connect to mysqld[$idx] " .
+                "in $IM_CONNECT_TIMEOUT seconds after start.");
+      mtr_debug("Aborting test suite...");
+
+      mtr_kill_leftovers();
+
+      mtr_error("Can not connect to mysqld[$idx] " .
+                "in $IM_CONNECT_TIMEOUT seconds after start.");
+    }
+
+    mtr_debug("mysqld[$idx] started.");
+  }
+
+  mtr_debug("Instance Manager started.");
+
+  mtr_im_load_pids($instance_manager);
+}
+
+##############################################################################
+
+sub mtr_im_stop($$) {
+  my $instance_manager= shift;
+  my $where= shift;
+
+  mtr_debug("Stopping Instance Manager...");
+
+  # Try graceful shutdown.
+
+  mtr_im_terminate($instance_manager);
+
+  # Check that all processes died.
+
+  unless (mtr_im_check_alive($instance_manager))
+  {
+    mtr_debug("Instance Manager has been stopped successfully.");
+    mtr_im_cleanup($instance_manager);
+    return 1;
+  }
+
+  # Instance Manager don't want to die. We should kill it.
+
+  mtr_im_errlog("[$where] Instance Manager did not shutdown gracefully.");
+
+  mtr_im_kill($instance_manager);
+
+  # Check again that all IM-related processes have been killed.
+
+  my $im_is_alive= mtr_im_check_alive($instance_manager);
+
+  mtr_im_cleanup($instance_manager);
+
+  if ($im_is_alive)
+  {
+    mtr_error("Can not kill Instance Manager or its children.");
+    return 0;
+  }
+
+  mtr_debug("Instance Manager has been killed successfully.");
+  return 1;
+}
+
+###########################################################################
+
 1;
diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index 6b4196fe77f..13da2af0c45 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -344,7 +344,7 @@ sub snapshot_setup ();
 sub executable_setup ();
 sub environment_setup ();
 sub kill_running_server ();
-sub kill_and_cleanup ();
+sub cleanup_stale_files ();
 sub check_ssl_support ();
 sub check_running_as_root();
 sub check_ndbcluster_support ();
@@ -368,8 +368,6 @@ sub ndb_mgmd_start ($);
 sub mysqld_start ($$$);
 sub mysqld_arguments ($$$$$);
 sub stop_all_servers ();
-sub im_start ($$);
-sub im_stop ($$);
 sub run_mysqltest ($);
 sub usage ($);
 
@@ -1454,14 +1452,13 @@ sub kill_running_server () {
 
     mtr_report("Killing Possible Leftover Processes");
     mkpath("$opt_vardir/log"); # Needed for mysqladmin log
+
     mtr_kill_leftovers();
 
    }
 }
 
-sub kill_and_cleanup () {
-
-  kill_running_server ();
+sub cleanup_stale_files () {
 
   mtr_report("Removing Stale Files");
 
@@ -1999,13 +1996,11 @@ sub run_suite () {
 sub initialize_servers () {
   if ( ! $glob_use_running_server )
   {
-    if ( $opt_start_dirty )
+    kill_running_server();
+
+    unless ( $opt_start_dirty )
     {
-      kill_running_server();
-    }
-    else
-    {
-      kill_and_cleanup();
+      cleanup_stale_files();
       mysql_install_db();
       if ( $opt_force )
       {
@@ -2397,10 +2392,9 @@ sub run_testcase ($) {
   # Stop Instance Manager if we are processing an IM-test case.
   # ----------------------------------------------------------------------
 
-  if ( ! $glob_use_running_server and $tinfo->{'component_id'} eq 'im' and
-       $instance_manager->{'pid'} )
+  if ( ! $glob_use_running_server and $tinfo->{'component_id'} eq 'im' )
   {
-    im_stop($instance_manager, $tinfo->{'name'});
+    mtr_im_stop($instance_manager, $tinfo->{'name'});
   }
 }
 
@@ -2937,11 +2931,8 @@ sub stop_all_servers () {
 
   print  "Stopping All Servers\n";
 
-  if ( $instance_manager->{'pid'} )
-  {
-    print  "Shutting-down Instance Manager\n";
-    im_stop($instance_manager, "stop_all_servers");
-  }
+  print  "Shutting-down Instance Manager\n";
+  mtr_im_stop($instance_manager, "stop_all_servers");
 
   my %admin_pids; # hash of admin processes that requests shutdown
   my @kill_pids;  # list of processes to shutdown/kill
@@ -3332,7 +3323,7 @@ sub run_testcase_start_servers($) {
 
     im_create_defaults_file($instance_manager);
 
-    im_start($instance_manager, $tinfo->{im_opts});
+    mtr_im_start($instance_manager, $tinfo->{im_opts});
   }
 
   # ----------------------------------------------------------------------
@@ -3396,236 +3387,6 @@ sub run_testcase_start_servers($) {
   }
 }
 
-
-##############################################################################
-#
-#  Instance Manager management routines.
-#
-##############################################################################
-
-sub im_start($$) {
-  my $instance_manager = shift;
-  my $opts = shift;
-
-  my $args;
-  mtr_init_args(\$args);
-  mtr_add_arg($args, "--defaults-file=%s",
-              $instance_manager->{'defaults_file'});
-
-  if ( $opt_debug )
-  {
-    mtr_add_arg($args, "--debug=d:t:i:A,%s/log/im.trace",
-                $opt_vardir_trace);
-  }
-
-  foreach my $opt (@{$opts})
-  {
-    mtr_add_arg($args, $opt);
-  }
-
-  $instance_manager->{'pid'} =
-    mtr_spawn(
-      $exe_im,                          # path to the executable
-      $args,                            # cmd-line args
-      '',                               # stdin
-      $instance_manager->{'path_log'},  # stdout
-      $instance_manager->{'path_err'},  # stderr
-      '',                               # pid file path (not used)
-      { append_log_file => 1 }          # append log files
-      );
-
-  if ( ! $instance_manager->{'pid'} )
-  {
-    mtr_report('Could not start Instance Manager');
-    return;
-  }
-
-  # Instance Manager can be run in daemon mode. In this case, it creates
-  # several processes and the parent process, created by mtr_spawn(), exits just
-  # after start. So, we have to obtain Instance Manager PID from the PID file.
-
-  if ( ! sleep_until_file_created(
-                                  $instance_manager->{'path_pid'},
-                                  $instance_manager->{'start_timeout'},
-                                  -1)) # real PID is still unknown
-  {
-    mtr_report("Instance Manager PID file is missing");
-    return;
-  }
-
-  my $pid=  mtr_get_pid_from_file($instance_manager->{'path_pid'});
-  $instance_manager->{'pid'} = $pid;
-  mtr_verbose("im_start: pid: $pid");
-}
-
-
-sub im_stop($$) {
-  my $instance_manager = shift;
-  my $where = shift;
-
-  # Obtain mysqld-process pids before we start stopping IM (it can delete pid
-  # files).
-
-  my @mysqld_pids = ();
-  my $instances = $instance_manager->{'instances'};
-
-  push(@mysqld_pids, mtr_get_pid_from_file($instances->[0]->{'path_pid'}))
-    if -r $instances->[0]->{'path_pid'};
-
-  push(@mysqld_pids, mtr_get_pid_from_file($instances->[1]->{'path_pid'}))
-    if -r $instances->[1]->{'path_pid'};
-
-  # Re-read pid from the file, since during tests Instance Manager could have
-  # been restarted, so its pid could have been changed.
-
-  $instance_manager->{'pid'} =
-    mtr_get_pid_from_file($instance_manager->{'path_pid'})
-      if -f $instance_manager->{'path_pid'};
-
-  if (-f $instance_manager->{'path_angel_pid'})
-  {
-    $instance_manager->{'angel_pid'} =
-      mtr_get_pid_from_file($instance_manager->{'path_angel_pid'})
-  }
-  else
-  {
-    $instance_manager->{'angel_pid'} = undef;
-  }
-
-  # Inspired from mtr_stop_mysqld_servers().
-
-  start_reap_all();
-
-  # Try graceful shutdown.
-
-  mtr_verbose("Stopping IM-main, pid: $instance_manager->{'pid'}");
-  mtr_kill_process($instance_manager->{'pid'}, 'TERM', 10);
-
-  # If necessary, wait for angel process to die.
-
-  my $pid= $instance_manager->{'angel_pid'};
-  if (defined $pid)
-  {
-    mtr_verbose("Waiting for IM-angel to die, pid: $pid");
-
-    my $total_attempts= 10;
-
-    for (my $cur_attempt=1; $cur_attempt <= $total_attempts; ++$cur_attempt)
-    {
-      unless (kill (0, $pid))
-      {
-        mtr_verbose("IM-angel died.");
-        last;
-      }
-
-      sleep(1);
-    }
-  }
-
-  # Check if all processes shutdown cleanly
-  my $clean_shutdown= 0;
-
-  while (1)
-  {
-    # Check that IM-main died.
-
-    if (kill (0, $instance_manager->{'pid'}))
-    {
-      mtr_debug("IM-main is still alive.");
-      last;
-    }
-
-    # Check that IM-angel died.
-
-    if (defined $instance_manager->{'angel_pid'} &&
-        kill (0, $instance_manager->{'angel_pid'}))
-    {
-      mtr_debug("IM-angel is still alive.");
-      last;
-    }
-
-    # Check that all guarded mysqld-instances died.
-
-    my $guarded_mysqlds_dead= 1;
-
-    foreach my $pid (@mysqld_pids)
-    {
-      if (kill (0, $pid))
-      {
-        mtr_debug("Guarded mysqld ($pid) is still alive.");
-        $guarded_mysqlds_dead= 0;
-        last;
-      }
-    }
-
-    last unless $guarded_mysqlds_dead;
-
-    # Ok, all necessary processes are dead.
-
-    $clean_shutdown= 1;
-    last;
-  }
-
-  # Kill leftovers (the order is important).
-
-  if ($clean_shutdown)
-  {
-    mtr_debug("IM-shutdown was clean -- all processed died.");
-  }
-  else
-  {
-    mtr_debug("IM failed to shutdown gracefully. We have to clean the mess...");
-  }
-
-  unless ($clean_shutdown)
-  {
-
-    if (defined $instance_manager->{'angel_pid'})
-    {
-      mtr_verbose("Killing IM-angel, pid: $instance_manager->{'angel_pid'}");
-      mtr_kill_process($instance_manager->{'angel_pid'}, 'KILL', 10)
-    }
-
-    mtr_verbose("Killing IM-main, pid: $instance_manager->{'pid'}");
-    mtr_kill_process($instance_manager->{'pid'}, 'KILL', 10);
-
-    # Shutdown managed mysqld-processes. Some of them may be nonguarded, so IM
-    # will not stop them on shutdown. So, we should firstly try to end them
-    # legally.
-
-    mtr_verbose("Killing guarded mysqld(s) " . join(" ", @mysqld_pids));
-    mtr_kill_processes(\@mysqld_pids);
-
-    # Complain in error log so that a warning will be shown.
-    # 
-    # TODO: unless BUG#20761 is fixed, we will print the warning
-    # to stdout, so that it can be seen on console and does not
-    # produce pushbuild error.
-
-    # my $errlog= "$opt_vardir/log/mysql-test-run.pl.err";
-    # 
-    # open (ERRLOG, ">>$errlog") ||
-    #   mtr_error("Can not open error log ($errlog)");
-    # 
-    # my $ts= localtime();
-    # print ERRLOG
-    #   "Warning: [$ts] Instance Manager did not shutdown gracefully.\n";
-    # 
-    # close ERRLOG;
-
-    my $ts= localtime();
-    print "[$where] Warning: [$ts] Instance Manager did not shutdown gracefully.\n";
-  }
-
-  # That's all.
-
-  stop_reap_all();
-
-  $instance_manager->{'pid'} = undef;
-  $instance_manager->{'angel_pid'} = undef;
-}
-
-
 #
 # Run include/check-testcase.test
 # Before a testcase, run in record mode, save result file to var
diff --git a/mysql-test/r/grant.result b/mysql-test/r/grant.result
index 3ac48e4a01f..5dbbfbd9ab8 100644
--- a/mysql-test/r/grant.result
+++ b/mysql-test/r/grant.result
@@ -945,6 +945,31 @@ DROP TABLE mysqltest3.t_nn;
 DROP DATABASE mysqltest3;
 REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'mysqltest_1'@'localhost';
 DROP USER 'mysqltest_1'@'localhost';
+use test;
 create user mysqltest1_thisisreallytoolong;
-ERROR HY000: Operation CREATE USER failed for 'mysqltest1_thisisreallytoolong'@'%'
+ERROR HY000: String 'mysqltest1_thisisreallytoolong' is too long for user name (should be no longer than 16)
+GRANT CREATE ON mysqltest.* TO 1234567890abcdefGHIKL@localhost;
+ERROR HY000: String '1234567890abcdefGHIKL' is too long for user name (should be no longer than 16)
+GRANT CREATE ON mysqltest.* TO some_user_name@1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY;
+ERROR HY000: String '1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY' is too long for host name (should be no longer than 60)
+REVOKE CREATE ON mysqltest.* FROM 1234567890abcdefGHIKL@localhost;
+ERROR HY000: String '1234567890abcdefGHIKL' is too long for user name (should be no longer than 16)
+REVOKE CREATE ON mysqltest.* FROM some_user_name@1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY;
+ERROR HY000: String '1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY' is too long for host name (should be no longer than 60)
+GRANT CREATE ON t1 TO 1234567890abcdefGHIKL@localhost;
+ERROR HY000: String '1234567890abcdefGHIKL' is too long for user name (should be no longer than 16)
+GRANT CREATE ON t1 TO some_user_name@1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY;
+ERROR HY000: String '1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY' is too long for host name (should be no longer than 60)
+REVOKE CREATE ON t1 FROM 1234567890abcdefGHIKL@localhost;
+ERROR HY000: String '1234567890abcdefGHIKL' is too long for user name (should be no longer than 16)
+REVOKE CREATE ON t1 FROM some_user_name@1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY;
+ERROR HY000: String '1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY' is too long for host name (should be no longer than 60)
+GRANT EXECUTE ON PROCEDURE p1 TO 1234567890abcdefGHIKL@localhost;
+ERROR HY000: String '1234567890abcdefGHIKL' is too long for user name (should be no longer than 16)
+GRANT EXECUTE ON PROCEDURE p1 TO some_user_name@1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY;
+ERROR HY000: String '1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY' is too long for host name (should be no longer than 60)
+REVOKE EXECUTE ON PROCEDURE p1 FROM 1234567890abcdefGHIKL@localhost;
+ERROR HY000: String '1234567890abcdefGHIKL' is too long for user name (should be no longer than 16)
+REVOKE EXECUTE ON PROCEDURE t1 FROM some_user_name@1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY;
+ERROR HY000: String '1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY' is too long for host name (should be no longer than 60)
 End of 5.0 tests
diff --git a/mysql-test/r/im_cmd_line.result b/mysql-test/r/im_cmd_line.result
index 5b289549a3f..a4c21c36415 100644
--- a/mysql-test/r/im_cmd_line.result
+++ b/mysql-test/r/im_cmd_line.result
@@ -1,3 +1,10 @@
+SHOW VARIABLES LIKE 'server_id';
+Variable_name	Value
+server_id	1
+SHOW INSTANCES;
+instance_name	state
+mysqld1	starting
+mysqld2	offline
 --> Listing users...
 im_admin
 
diff --git a/mysql-test/r/im_instance_conf.result b/mysql-test/r/im_instance_conf.result
index f68fcca25a3..fe9847825a5 100644
--- a/mysql-test/r/im_instance_conf.result
+++ b/mysql-test/r/im_instance_conf.result
@@ -1,18 +1,14 @@
---------------------------------------------------------------------
-server_id           = 1
-server_id           = 2
---------------------------------------------------------------------
+SHOW VARIABLES LIKE 'server_id';
+Variable_name	Value
+server_id	1
 SHOW INSTANCES;
 instance_name	state
 mysqld1	online
 mysqld2	offline
-
----> connection: mysql1_con
-SHOW VARIABLES LIKE 'server_id';
-Variable_name	Value
-server_id	1
-
----> connection: default
+--------------------------------------------------------------------
+server_id           = 1
+server_id           = 2
+--------------------------------------------------------------------
 CREATE INSTANCE mysqld3
 server_id = 3,
 socket = "$MYSQL_TMP_DIR/mysqld_3.sock";
diff --git a/mysql-test/r/sp.result b/mysql-test/r/sp.result
index b516058eabd..fb40b52475b 100644
--- a/mysql-test/r/sp.result
+++ b/mysql-test/r/sp.result
@@ -4872,8 +4872,6 @@ declare continue handler for sqlexception begin end;
 select no_such_function();
 end|
 call bug18787()|
-no_such_function()
-NULL
 drop procedure bug18787|
 create database bug18344_012345678901|
 use bug18344_012345678901|
@@ -5223,20 +5221,125 @@ greek	greek_general_ci
 use test|
 DROP DATABASE mysqltest1|
 drop table if exists t3|
-drop database if exists mysqltest1|
+drop table if exists t4|
+drop procedure if exists bug8153_subselect|
+drop procedure if exists bug8153_subselect_a|
+drop procedure if exists bug8153_subselect_b|
+drop procedure if exists bug8153_proc_a|
+drop procedure if exists bug8153_proc_b|
 create table t3 (a int)|
-insert into t3 (a) values (1), (2)|
-create database mysqltest1|
-use mysqltest1|
-drop database mysqltest1|
-select database()|
-database()
-NULL
-select * from (select 1 as a) as t1 natural join (select * from test.t3) as t2|
+create table t4 (a int)|
+insert into t3 values (1), (1), (2), (3)|
+insert into t4 values (1), (1)|
+create procedure bug8153_subselect()
+begin
+declare continue handler for sqlexception
+begin
+select 'statement failed';
+end;
+update t3 set a=a+1 where (select a from t4 where a=1) is null;
+select 'statement after update';
+end|
+call bug8153_subselect()|
+statement failed
+statement failed
+statement after update
+statement after update
+select * from t3|
 a
 1
-use test|
+1
+2
+3
+call bug8153_subselect()|
+statement failed
+statement failed
+statement after update
+statement after update
+select * from t3|
+a
+1
+1
+2
+3
+drop procedure bug8153_subselect|
+create procedure bug8153_subselect_a()
+begin
+declare continue handler for sqlexception
+begin
+select 'in continue handler';
+end;
+select 'reachable code a1';
+call bug8153_subselect_b();
+select 'reachable code a2';
+end|
+create procedure bug8153_subselect_b()
+begin
+select 'reachable code b1';
+update t3 set a=a+1 where (select a from t4 where a=1) is null;
+select 'unreachable code b2';
+end|
+call bug8153_subselect_a()|
+reachable code a1
+reachable code a1
+reachable code b1
+reachable code b1
+in continue handler
+in continue handler
+reachable code a2
+reachable code a2
+select * from t3|
+a
+1
+1
+2
+3
+call bug8153_subselect_a()|
+reachable code a1
+reachable code a1
+reachable code b1
+reachable code b1
+in continue handler
+in continue handler
+reachable code a2
+reachable code a2
+select * from t3|
+a
+1
+1
+2
+3
+drop procedure bug8153_subselect_a|
+drop procedure bug8153_subselect_b|
+create procedure bug8153_proc_a()
+begin
+declare continue handler for sqlexception
+begin
+select 'in continue handler';
+end;
+select 'reachable code a1';
+call bug8153_proc_b();
+select 'reachable code a2';
+end|
+create procedure bug8153_proc_b()
+begin
+select 'reachable code b1';
+select no_such_function();
+select 'unreachable code b2';
+end|
+call bug8153_proc_a()|
+reachable code a1
+reachable code a1
+reachable code b1
+reachable code b1
+in continue handler
+in continue handler
+reachable code a2
+reachable code a2
+drop procedure bug8153_proc_a|
+drop procedure bug8153_proc_b|
 drop table t3|
+drop table t4|
 drop procedure if exists bug19862|
 CREATE TABLE t11 (a INT)|
 CREATE TABLE t12 (a INT)|
@@ -5256,5 +5359,25 @@ a
 2
 DROP TABLE t11, t12|
 DROP FUNCTION bug19862|
+DROP PROCEDURE IF EXISTS bug16899_p1|
+DROP FUNCTION IF EXISTS bug16899_f1|
+CREATE DEFINER=1234567890abcdefGHIKL@localhost PROCEDURE bug16899_p1()
+BEGIN
+SET @a = 1;
+END|
+ERROR HY000: String '1234567890abcdefGHIKL' is too long for user name (should be no longer than 16)
+CREATE DEFINER=some_user_name@1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY
+FUNCTION bug16899_f1() RETURNS INT
+BEGIN
+RETURN 1;
+END|
+ERROR HY000: String '1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY' is too long for host name (should be no longer than 60)
+drop procedure if exists bug21416|
+create procedure bug21416() show create procedure bug21416|
+call bug21416()|
+Procedure	sql_mode	Create Procedure
+bug21416		CREATE DEFINER=`root`@`localhost` PROCEDURE `bug21416`()
+show create procedure bug21416
+drop procedure bug21416|
 End of 5.0 tests
 drop table t1,t2;
diff --git a/mysql-test/t/grant.test b/mysql-test/t/grant.test
index 5bacbf7d50f..d3689a07237 100644
--- a/mysql-test/t/grant.test
+++ b/mysql-test/t/grant.test
@@ -807,7 +807,8 @@ DROP DATABASE mysqltest3;
 REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'mysqltest_1'@'localhost';
 DROP USER 'mysqltest_1'@'localhost';
 
-
+# restore the original database
+use test;
 
 #
 # Bug #10668: CREATE USER does not enforce username length limit
diff --git a/mysql-test/t/im_cmd_line.imtest b/mysql-test/t/im_cmd_line.imtest
index 29ed420439d..8dd348471d0 100644
--- a/mysql-test/t/im_cmd_line.imtest
+++ b/mysql-test/t/im_cmd_line.imtest
@@ -4,7 +4,7 @@
 #
 ###########################################################################
 
---source include/im_check_os.inc
+--source include/im_check_env.inc
 
 ###########################################################################
 
diff --git a/mysql-test/t/im_instance_conf.imtest b/mysql-test/t/im_instance_conf.imtest
index abd22c1ba9d..c210250cdaf 100644
--- a/mysql-test/t/im_instance_conf.imtest
+++ b/mysql-test/t/im_instance_conf.imtest
@@ -26,7 +26,7 @@
 #
 ###########################################################################
 
---source include/im_check_os.inc
+--source include/im_check_env.inc
 
 ###########################################################################
 #
@@ -40,29 +40,6 @@
 --exec grep '^server_id\>' $MYSQLTEST_VARDIR/im.cnf;
 --echo --------------------------------------------------------------------
 
-# Check that mysqld1 is reported as running.
-
---sleep 3
-# should be longer than monitoring interval and enough to start instance.
-
-SHOW INSTANCES;
-
-# Check that the expected mysqld instance is actually run (check that we can
-# connect and execute something).
-
---echo
---echo ---> connection: mysql1_con
---connect (mysql1_con,localhost,root,,mysql,$IM_MYSQLD1_PORT,$IM_MYSQLD1_SOCK)
---connection mysql1_con
-
-SHOW VARIABLES LIKE 'server_id';
-
---disconnect mysql1_con
-
---echo
---echo ---> connection: default
---connection default
-
 ###########################################################################
 #
 # CREATE INSTANCE tests.
diff --git a/sql/field.cc b/sql/field.cc
index 3b48aa5ad24..8d852b644bc 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -6302,7 +6302,7 @@ Field *Field_string::new_field(MEM_ROOT *root, struct st_table *new_table,
 {
   Field *field;
   if (type() != MYSQL_TYPE_VAR_STRING || keep_type)
-    new_field= Field::new_field(root, new_table, keep_type);
+    field= Field::new_field(root, new_table, keep_type);
   else if ((field= new Field_varstring(field_length, maybe_null(), field_name,
                                        new_table->s, charset())))
   {
@@ -6318,7 +6318,7 @@ Field *Field_string::new_field(MEM_ROOT *root, struct st_table *new_table,
       not applicable. But we still need to preserve the original field
       metadata for the client-server protocol.
     */
-    new_field->orig_table= orig_table;
+    field->orig_table= orig_table;
   }
   return field;
 }
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc
index 88e8890c50e..4d793af4f93 100644
--- a/sql/item_cmpfunc.cc
+++ b/sql/item_cmpfunc.cc
@@ -515,8 +515,8 @@ int Arg_comparator::set_compare_func(Item_bool_func2 *item, Item_result type)
         which would be transformed to:
         WHERE col= 'j'
       */
-      (*a)->walk(&Item::set_no_const_sub, (byte*) 0);
-      (*b)->walk(&Item::set_no_const_sub, (byte*) 0);
+      (*a)->walk(&Item::set_no_const_sub, FALSE, (byte*) 0);
+      (*b)->walk(&Item::set_no_const_sub, FALSE, (byte*) 0);
     }
     break;
   }
diff --git a/sql/sp_head.cc b/sql/sp_head.cc
index d55b9ff71de..fc4aa5e26d6 100644
--- a/sql/sp_head.cc
+++ b/sql/sp_head.cc
@@ -270,7 +270,6 @@ sp_get_flags_for_command(LEX *lex)
   case SQLCOM_CREATE_EVENT:
   case SQLCOM_ALTER_EVENT:
   case SQLCOM_DROP_EVENT:
-  case SQLCOM_FLUSH:
   case SQLCOM_INSTALL_PLUGIN:
   case SQLCOM_UNINSTALL_PLUGIN:
     flags= sp_head::HAS_COMMIT_OR_ROLLBACK;
diff --git a/sql/sp_head.h b/sql/sp_head.h
index 3de23903c47..41ed5256840 100644
--- a/sql/sp_head.h
+++ b/sql/sp_head.h
@@ -118,7 +118,7 @@ public:
     HAS_COMMIT_OR_ROLLBACK= 128,
     LOG_SLOW_STATEMENTS= 256,   // Used by events
     LOG_GENERAL_LOG= 512,        // Used by events
-    BINLOG_ROW_BASED_IF_MIXED= 1024
+    BINLOG_ROW_BASED_IF_MIXED= 1024,
     HAS_SQLCOM_RESET= 2048,
     HAS_SQLCOM_FLUSH= 4096
   };