The system error is displayed by the del.icio.us

System error
error:          Can't call method "prepare" on an undefined value at /www/del.icio.us/comp/user/get line 13.
context:
...
9:      my $usedb = 'master';
10:     my $ret;
11:
12:     if (!$auth_user) { $usedb = 'user' }
13:     if (!exists ($db->{$usedb})) { $usedb = 'master' }
14:     $user_name_q->{$usedb} = $db->{$usedb}->prepare('select * from users where user_name = ?');
15:     my $query = $user_name_q->{$usedb};
16:     $query->execute(lc($user_name));
17:
...
code stack:     /www/del.icio.us/comp/user/get:13
/www/del.icio.us/comp/posts/all:35
/www/del.icio.us/site/index:82
/www/del.icio.us/site/autohandler:110
raw error
 
Can't call method "prepare" on an undefined value at /www/del.icio.us/comp/user/get line 13.
 
 
Trace begun at /usr/share/perl5/HTML/Mason/Exceptions.pm line 131
HTML::Mason::Exceptions::rethrow_exception('Can\'t call method "prepare" on an undefined value at /www/del.icio.us/comp/user/get line 13.^J') called at /www/del.icio.us/comp/user/get line 13
HTML::Mason::Commands::__ANON__('dbh', 'DBI::db=HASH(0x1b3f990)', 'user_name', 'clouder') called at /usr/share/perl5/HTML/Mason/Component.pm line 134
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x1d12840)', 'dbh', 'DBI::db=HASH(0x1b3f990)', 'user_name', 'clouder') called at /usr/share/perl5/HTML/Mason/Request.pm line 1069
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1068
HTML::Mason::Request::comp(undef, undef, 'dbh', 'DBI::db=HASH(0x1b3f990)', 'user_name', 'clouder') called at /www/del.icio.us/comp/posts/all line 35
HTML::Mason::Commands::__ANON__('dbh', 'DBI::db=HASH(0x1b3f990)', 'auth_user', 'clouder', 'count', 20, 'mp3', 0, 'time_format', 'by-second') called at /usr/share/perl5/HTML/Mason/Component.pm line 134
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x1ed3080)', 'dbh', 'DBI::db=HASH(0x1b3f990)', 'auth_user', 'clouder', 'count', 20, 'mp3', 0, 'time_format', 'by-second') called at /usr/share/perl5/HTML/Mason/Request.pm line 1074
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1068
HTML::Mason::Request::comp(undef, undef, 'dbh', 'DBI::db=HASH(0x1b3f990)', 'auth_user', 'clouder', 'count', 20, 'mp3', 0, 'time_format', 'by-second') called at /www/del.icio.us/site/index line 82
HTML::Mason::Commands::__ANON__('dbh', 'DBI::db=HASH(0x1b3f990)', 'auth_user', 'clouder', 'items', 100, 'tagview', 'cloud', 'tagsort', 'alpha', 'bundleview', 'show', 'cookies', 'HASH(0x1ec6920)', 'browser', 'ff') called at /usr/share/perl5/HTML/Mason/Component.pm line 134
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x1dadfe0)', 'dbh', 'DBI::db=HASH(0x1b3f990)', 'auth_user', 'clouder', 'items', 100, 'tagview', 'cloud', 'tagsort', 'alpha', 'bundleview', 'show', 'cookies', 'HASH(0x1ec6920)', 'browser', 'ff') called at /usr/share/perl5/HTML/Mason/Request.pm line 1074
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1068
HTML::Mason::Request::comp(undef, undef, 'dbh', 'DBI::db=HASH(0x1b3f990)', 'auth_user', 'clouder', 'items', 100, 'tagview', 'cloud', 'tagsort', 'alpha', 'bundleview', 'show', 'cookies', 'HASH(0x1ec6920)', 'browser', 'ff') called at /usr/share/perl5/HTML/Mason/Request.pm line 760
HTML::Mason::Request::call_next('HTML::Mason::Request::ApacheHandler=HASH(0x1ec7520)', 'dbh', 'DBI::db=HASH(0x1b3f990)', 'auth_user', 'clouder', 'items', 100, 'tagview', 'cloud', 'tagsort', 'alpha', 'bundleview', 'show', 'cookies', 'HASH(0x1ec6920)', 'browser', 'ff') called at /www/del.icio.us/site/autohandler line 110
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 134
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x1b22e70)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1069
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1068
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 338
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 338
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 297
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0x1ec7520)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 134
eval {...} at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 134
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0x1ec7520)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 793
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0x1ad1600)', 'Apache=SCALAR(0x1e71490)') called at (eval 43) line 8
HTML::Mason::ApacheHandler::handler('HTML::Mason::ApacheHandler', 'Apache=SCALAR(0x1e71490)') called at /dev/null line 0
eval {...} at /dev/null line 0