lib\jblond\Diff\SequenceMatcher.php:622 PhanTypeMismatchDimFetch

When fetching an array index from a value of type
array<int,array{0:'equal',1:0|mixed,2:1|mixed,3:0|mixed,4:1|mixed}>|array{},
found an array index of type '0', but expected the index to be of type int

Author: JBlond

lib/jblond/Diff/SequenceMatcher.php

@@ -619,7 +619,7 @@ public function getGroupedOpcodes(int $context = 3) : array
             );
         }
 
-        if (!empty($group) && !(count($group) == 1 && $group['0']['0'] == 'equal')) {
+        if (!empty($group) && !(count($group) == 1 && $group[0][0] == 'equal')) {
             $groups[] = $group;
         }