Comment 1 for bug 1199190

Confirmed, we don't pass an argument to mysql_close() in this code:

  if( $option_ibbackup_binary eq "autodetect" ){
   # Try to connect MySQL and get the version
                        %mysql = mysql_connect(
                                               abort_on_error => 0,
                                               keepalives => 0
                                              );
                        if ($mysql{dbh}) {
                            print STDERR "Connected successfully\n";
                            $option_ibbackup_binary = set_xtrabackup_version();
                            mysql_close();
....

OTOH that code is only reached if there is no xtrabackup_binary file in the backup directory *and* the xtrabackup binary was not specified explicitly with --ibbackup.

So I would first figure out why xtrabackup_binary was not written to the backup directory (it should be, if the backup was successfully created with innobackupex).

The workaround is to specify the xtrabackup binary explicitly using the --ibbackup option.