[[!comment format=mdwn
 username="https://www.google.com/accounts/o8/id?id=AItOawlobQ5j7hQVIGkwMWW3yKB_DWqthJcpnsQ"
 nickname="Qi"
 subject="Fix"
 date="2015-02-25T05:43:26Z"
 content="""
I fixed it by adding

~~~
sub decode($$;$) {
    my ( $name, $octets, $check ) = @_;
    return undef unless defined $octets;
    return $octets if Encode::is_utf8($octets);  # add this check
	$octets .= '';
~~~
"""]]