Uncaught TypeError: Unsupported operand types: string * int in date.php

Hi,

Most recent 1.4.23-svn appears to have a problem with emails with corrupt
date fields?

Fatal error: Uncaught TypeError: Unsupported operand types: string * int in
/usr/share/squirrelmail/functions/date.php:91 Stack trace: #0
/usr/share/squirrelmail/functions/date.php(463): getGMTSeconds(1583293098,
'+UT') #1 /usr/share/squirrelmail/functions/imap_messages.php(946):
getTimeStamp(Array) #2
/usr/share/squirrelmail/functions/mailbox_display.php(628):
sqimap_get_small_header_list(Resource id #1, Array, 999999) #3
/usr/share/squirrelmail/functions/mailbox_display.php(407):
fillMessageArray(Resource id #1, Array, 3291, 999999) #4
/usr/share/squirrelmail/functions/mailbox_display.php(518):
getSelfSortMessages(Resource id #1, 1, 999999, 3291, '0', Array) #5
/usr/share/squirrelmail/src/right_main.php(238):
showMessagesForMailbox(Resource id #1, '2020', 3291, 1, '0', Array, 15,
false) #6 {main} thrown in /usr/share/squirrelmail/functions/date.php on
line 91

    87          $tzc = '+'.$tzc;
    88      }
    89      $hh = substr($tzc,1,2);
    90      $mm = substr($tzc,3,2);
    91      $iTzc = ($hh * 60 + $mm) * 60;
    92      if ($neg) $iTzc = -1 * (int) $iTzc;
    93      /* stamp in gmt */
    94      $stamp -= $iTzc;
    95      /** now find what the server is at **/
    96      $current = date('Z', time());

There are like 3200 messages in the folder where this occurs, so I have no
idea which message caused it or what the problem might be. Any ideas? How
can I help troubleshoot this further?

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