skip alternation (|) tokens

Author: mvorisek

src/Type/Regex/RegexGroupParser.php

@@ -286,6 +286,10 @@ private function createGroupType(TreeNode $group, bool $maybeConstant, string $p
 		if ($rootAlternation !== null) {
 			$types = [];
 			foreach ($rootAlternation->getChildren() as $alternative) {
+				if ($alternative->getValueToken() === 'alternation') {
+					continue;
+				}
+
 				$types[] = $this->createGroupType($alternative, $maybeConstant, $patternModifiers);
 			}