...Re-storing serialized dumps as JSON-encoded arrays for all rows (3/4).
PHP Notice:  unserialize(): Error at offset 493 of 5608 bytes in /(wiki path)/extensions/AbuseFilter/maintenance/updateVarDumps.php on line 526
[9f481c3285afaa7bdc402410] [no req]   TypeError from line 569 of /(wiki path)/extensions/AbuseFilter/maintenance/updateVarDumps.php: Argument 1 passed to UpdateVarDumps::updateVariables() must be of the type array, bool given, called in /(wiki path)/extensions/AbuseFilter/maintenance/updateVarDumps.php on line 531
Backtrace:
#0 /(wiki path)/extensions/AbuseFilter/maintenance/updateVarDumps.php(531): UpdateVarDumps->updateVariables()
#1 /(wiki path)/extensions/AbuseFilter/maintenance/updateVarDumps.php(485): UpdateVarDumps->doUpdateText()
#2 /(wiki path)/extensions/AbuseFilter/maintenance/updateVarDumps.php(103): UpdateVarDumps->updateText()
#3 /(wiki path)/maintenance/includes/LoggedUpdateMaintenance.php(45): UpdateVarDumps->doDBUpdates()
#4 /(wiki path)/maintenance/update.php(193): LoggedUpdateMaintenance->execute()
#5 /(wiki path)/maintenance/doMaintenance.php(107): UpdateMediaWiki->execute()
#6 /(wiki path)/maintenance/update.php(253): require_once(string)
#7 {main}