Merge branch '5.4' into 6.3

* 5.4:
  Fix implicitly-required parameters
  List CS fix in .git-blame-ignore-revs
  Apply php-cs-fixer fix --rules nullable_type_declaration_for_default_null_value
  [Messenger][AmazonSqs] Allow async-aws/sqs version 2

Author: nicolas-grekas

Command/LintCommand.php

@@ -42,7 +42,7 @@ class LintCommand extends Command
     private ?\Closure $directoryIteratorProvider;
     private ?\Closure $isReadableProvider;
 
-    public function __construct(string $name = null, callable $directoryIteratorProvider = null, callable $isReadableProvider = null)
+    public function __construct(?string $name = null, ?callable $directoryIteratorProvider = null, ?callable $isReadableProvider = null)
     {
         parent::__construct($name);
 
@@ -127,7 +127,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         return $this->display($io, $filesInfo);
     }
 
-    private function validate(string $content, int $flags, string $file = null): array
+    private function validate(string $content, int $flags, ?string $file = null): array
     {
         $prevErrorHandler = set_error_handler(function ($level, $message, $file, $line) use (&$prevErrorHandler) {
             if (\E_USER_DEPRECATED === $level) {

Exception/ParseException.php

@@ -29,7 +29,7 @@ class ParseException extends RuntimeException
      * @param string|null $snippet    The snippet of code near the problem
      * @param string|null $parsedFile The file name where the error occurred
      */
-    public function __construct(string $message, int $parsedLine = -1, string $snippet = null, string $parsedFile = null, \Throwable $previous = null)
+    public function __construct(string $message, int $parsedLine = -1, ?string $snippet = null, ?string $parsedFile = null, ?\Throwable $previous = null)
     {
         $this->parsedFile = $parsedFile;
         $this->parsedLine = $parsedLine;

Inline.php

@@ -34,7 +34,7 @@ class Inline
     private static bool $objectForMap = false;
     private static bool $constantSupport = false;
 
-    public static function initialize(int $flags, int $parsedLineNumber = null, string $parsedFilename = null): void
+    public static function initialize(int $flags, ?int $parsedLineNumber = null, ?string $parsedFilename = null): void
     {
         self::$exceptionOnInvalidType = (bool) (Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE & $flags);
         self::$objectSupport = (bool) (Yaml::PARSE_OBJECT & $flags);
@@ -55,7 +55,7 @@ public static function initialize(int $flags, int $parsedLineNumber = null, stri
      *
      * @throws ParseException
      */
-    public static function parse(string $value = null, int $flags = 0, array &$references = []): mixed
+    public static function parse(?string $value = null, int $flags = 0, array &$references = []): mixed
     {
         if (null === $value) {
             return '';
@@ -271,7 +271,7 @@ private static function dumpNull(int $flags): string
      *
      * @throws ParseException When malformed inline YAML string is parsed
      */
-    public static function parseScalar(string $scalar, int $flags = 0, array $delimiters = null, int &$i = 0, bool $evaluate = true, array &$references = [], bool &$isQuoted = null): mixed
+    public static function parseScalar(string $scalar, int $flags = 0, ?array $delimiters = null, int &$i = 0, bool $evaluate = true, array &$references = [], ?bool &$isQuoted = null): mixed
     {
         if (\in_array($scalar[$i], ['"', "'"], true)) {
             // quoted scalar
@@ -560,7 +560,7 @@ private static function parseMapping(string $mapping, int $flags, int &$i = 0, a
      *
      * @throws ParseException when object parsing support was disabled and the parser detected a PHP object or when a reference could not be resolved
      */
-    private static function evaluateScalar(string $scalar, int $flags, array &$references = [], bool &$isQuotedString = null): mixed
+    private static function evaluateScalar(string $scalar, int $flags, array &$references = [], ?bool &$isQuotedString = null): mixed
     {
         $isQuotedString = false;
         $scalar = trim($scalar);

Parser.php

@@ -561,7 +561,7 @@ private function getCurrentLineIndentation(): int
      *
      * @throws ParseException When indentation problem are detected
      */
-    private function getNextEmbedBlock(int $indentation = null, bool $inSequence = false): string
+    private function getNextEmbedBlock(?int $indentation = null, bool $inSequence = false): string
     {
         $oldLineIndentation = $this->getCurrentLineIndentation();
 
@@ -1043,7 +1043,7 @@ private function isStringUnIndentedCollectionItem(): bool
      *
      * @internal
      */
-    public static function preg_match(string $pattern, string $subject, array &$matches = null, int $flags = 0, int $offset = 0): int
+    public static function preg_match(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): int
     {
         if (false === $ret = preg_match($pattern, $subject, $matches, $flags, $offset)) {
             throw new ParseException(preg_last_error_msg());