Some class-scoped expressions are not analyzed

[quasilyte]

Code Example

<?php
class C {
  public static $arr = [
    'key1' => 'something',
    'key2' => 'other_thing',
    'key1' => 'third_thing', // duplicate
  ];
}

Actual Behavior

No warnings.

Expected Behavior

Warning about duplicated array key.