Merge branch '4.4' into 5.0

* 4.4:
  [PropertyAccess] fix tests
  [WebProfilerBundle] fix test
  remove assertions that can never be reached
  [PropertyAccess] Improve message of unitialized property in php 7.4
  [HttpFoundation] Fixed session migration with custom cookie lifetime
  [HttpKernel][FrameworkBundle] fix compat with Debug component
  [Serializer] Remove unused variable
  Allow URL-encoded special characters in basic auth part of URLs
  [Serializer] Fix unitialized properties (from PHP 7.4.2) when serializing context for the cache key
  [Validator] Add missing Ukrainian and Russian translations
  Track session usage when setting the token
  [4.4][MonologBridge] Fix $level type
  No need to reconnect the bags to the session
  Support for Content Security Policy style-src-elem and script-src-elem in WebProfiler
  [PropertyInfo][ReflectionExtractor] Check the array mutator prefixes last when the property is singular
  [Security][Http][SwitchUserListener] Ignore all non existent username protection errors
  Add installation and minimal example to README

Author: nicolas-grekas

PropertyAccessor.php

@@ -385,7 +385,7 @@ private function readProperty(array $zval, string $property, bool $ignoreInvalid
                 } catch (\TypeError $e) {
                     // handle uninitialized properties in PHP >= 7
                     if (preg_match((sprintf('/^Return value of %s::%s\(\) must be of the type (\w+), null returned$/', preg_quote(\get_class($object)), $access[self::ACCESS_NAME])), $e->getMessage(), $matches)) {
-                        throw new AccessException(sprintf('The method "%s::%s()" returned "null", but expected type "%3$s". Have you forgotten to initialize a property or to make the return type nullable using "?%3$s" instead?', \get_class($object), $access[self::ACCESS_NAME], $matches[1]), 0, $e);
+                        throw new AccessException(sprintf('The method "%s::%s()" returned "null", but expected type "%3$s". Did you forget to initialize a property or to make the return type nullable using "?%3$s"?', \get_class($object), $access[self::ACCESS_NAME], $matches[1]), 0, $e);
                     }
 
                     throw $e;
@@ -418,7 +418,7 @@ private function readProperty(array $zval, string $property, bool $ignoreInvalid
             if (\PHP_VERSION_ID >= 70400 && preg_match('/^Typed property ([\w\\\]+)::\$(\w+) must not be accessed before initialization$/', $e->getMessage(), $matches)) {
                 $r = new \ReflectionProperty($matches[1], $matches[2]);
 
-                throw new AccessException(sprintf('The property "%s::$%s" is not readable because it is typed "%3$s". You should either initialize it or make it nullable using "?%3$s" instead.', $r->getDeclaringClass()->getName(), $r->getName(), $r->getType()->getName()), 0, $e);
+                throw new AccessException(sprintf('The property "%s::$%s" is not readable because it is typed "%s". You should initialize it or declare a default value instead.', $r->getDeclaringClass()->getName(), $r->getName(), $r->getType()->getName()), 0, $e);
             }
 
             throw $e;

Tests/PropertyAccessorTest.php

@@ -139,7 +139,7 @@ public function testGetValueThrowsExceptionIfIndexNotFoundAndIndexExceptionsEnab
     public function testGetValueThrowsExceptionIfUninitializedProperty()
     {
         $this->expectException('Symfony\Component\PropertyAccess\Exception\AccessException');
-        $this->expectExceptionMessage('The property "Symfony\Component\PropertyAccess\Tests\Fixtures\UninitializedProperty::$uninitialized" is not readable because it is typed "string". You should either initialize it or make it nullable using "?string" instead.');
+        $this->expectExceptionMessage('The property "Symfony\Component\PropertyAccess\Tests\Fixtures\UninitializedProperty::$uninitialized" is not readable because it is typed "string". You should initialize it or declare a default value instead.');
 
         $this->propertyAccessor->getValue(new UninitializedProperty(), 'uninitialized');
     }
@@ -150,7 +150,7 @@ public function testGetValueThrowsExceptionIfUninitializedProperty()
     public function testGetValueThrowsExceptionIfUninitializedPropertyWithGetter()
     {
         $this->expectException('Symfony\Component\PropertyAccess\Exception\AccessException');
-        $this->expectExceptionMessage('The method "Symfony\Component\PropertyAccess\Tests\Fixtures\UninitializedPrivateProperty::getUninitialized()" returned "null", but expected type "array". Have you forgotten to initialize a property or to make the return type nullable using "?array" instead?');
+        $this->expectExceptionMessage('The method "Symfony\Component\PropertyAccess\Tests\Fixtures\UninitializedPrivateProperty::getUninitialized()" returned "null", but expected type "array". Did you forget to initialize a property or to make the return type nullable using "?array"?');
 
         $this->propertyAccessor->getValue(new UninitializedPrivateProperty(), 'uninitialized');
     }