Commit just first part of fix for now

tests/ArrayAssignmentTest.php

@@ -73,20 +73,6 @@ class ArrayAssignmentTest extends TestCase
                     '$result===' => 'array{a::class: true, b::class: true}',
                 ],
             ],
-            'assignUnionOfLiteralsClassKeys2' => [
-                'code' => '<?php
-                    class a {}
-                    class b {}
-
-                    $result = ["c" => true];
-
-                    foreach ([a::class, b::class] as $k) {
-                        $result[$k] = true;
-                    }',
-                'assertions' => [
-                    '$result===' => 'array{a::class: true, b::class: true, c: true}',
-                ],
-            ],
             'genericArrayCreationWithSingleIntValue' => [
                 'code' => '<?php
                     $out = [];