[Tickets #3019] imp goes into an infinite loop for a couple of accounts (in Folder.php)

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Ticket URL: http://bugs.horde.org/ticket/?id=3019
-----------------------------------------------------------------------
 Ticket             | 3019
 Updated By         | seker at uwyo.edu
 Summary            | imp goes into an infinite loop for a couple of accounts (in  Folder.php)
 Queue              | IMP
 Version            | HEAD
 State              | Feedback
 Priority           | 2. Medium
 Type               | Bug
 Owners             | 
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seker at uwyo.edu (2005-11-29 12:12) wrote:

still doesn't work.  slightly Different error messages now:

[client ipaddr] PHP Warning:  explode(): Empty delimiter. in
/var/www/html/horde/imp/lib/Folder.php on line 168, referer:
https://webmail/horde/services/portal/sidebar.php

[client ipaddr ] PHP Warning:  array_pop(): The argument should be an array
in /var/www/html/horde/imp/lib/Folder.php on line 169, referer
: https://webmail/horde/services/portal/sidebar.php

Repeat starts here:
[client ipaddr] PHP Warning:  implode(): Bad arguments. in
/var/www/html/horde/imp/lib/Folder.php on line 174, referer:
https://webmail/horde/services/portal/sidebar.php

[client ipaddr] PHP Warning:  array_pop(): The argument should be an array
in /var/www/html/horde/imp/lib/Folder.php on line 186, referer
: https://webmail/horde/services/portal/sidebar.php
and repeat...

making sure the line number matchup, heres the code, starting at 168 through
187
 
168                    $parts = explode($mailbox['d'], $label);
169                    $subfolder = array_pop($parts);
170                    $parentparts = $parts;
171                    $pstack = array();
172
173                   while ($i = count($parentparts)) {
174                        $parent = implode($mailbox['d'], $parentparts);
175                        if (!empty($parent) &&
176                            !isset($seen[$parent])) {
177                            $seen[$parent] = true;
178                            $plabel = str_repeat(' ', 4 * ($i - 1)) .
String::convertCharset($parts[($i - 1)], 'UTF7-IMAP');
179                           if (strlen($plabel) > 26) {
180                                $pabbrev = String::substr($plabel, 0, 10)
. '...' . String::substr($plabel, -13, 13);
181                            } else {
182                                $pabbrev = $plabel;
183                            }
184                            $pstack[$parent] = array('val' => '', 'label'
=> $plabel, 'abbrev' => $pabbrev);
185                        }
186                        array_pop($parentparts);
187                  }