Merge branch '4.3' into 4.4

* 4.3:
  Re-enable previously failing PHP 7.4 test cases
  [PhpUnitBridge] fix uninitialized variable
  Revert "bug #33618 fix tests depending on other components' tests (xabbuh)"
  install from source to include components tests

Author: nicolas-grekas

DeprecationErrorHandler.php

@@ -96,7 +96,7 @@ public static function collectDeprecations($outputFile)
     {
         $deprecations = [];
         $previousErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = []) use (&$deprecations, &$previousErrorHandler) {
-            if (E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) {
+            if (E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type && (E_WARNING !== $type || false === strpos($msg, '" targeting switch is equivalent to "break')) {
                 if ($previousErrorHandler) {
                     return $previousErrorHandler($type, $msg, $file, $line, $context);
                 }
@@ -119,7 +119,7 @@ public static function collectDeprecations($outputFile)
      */
     public function handleError($type, $msg, $file, $line, $context = [])
     {
-        if ((E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) || !$this->getConfiguration()->isEnabled()) {
+        if ((E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type && (E_WARNING !== $type || false === strpos($msg, '" targeting switch is equivalent to "break')) || !$this->getConfiguration()->isEnabled()) {
             return \call_user_func(self::getPhpUnitErrorHandler(), $type, $msg, $file, $line, $context);
         }
 

DeprecationErrorHandler/Deprecation.php

@@ -53,16 +53,15 @@ class Deprecation
      */
     private $triggeringFile;
 
-    /** @var string[] absolute paths to vendor directories */
+    /** @var string[] Absolute paths to vendor directories */
     private static $vendors;
 
     /**
-     * @var string[] absolute paths to source or tests of the project. This
-     *               excludes cache directories, because it is based on
-     *               autoloading rules and cache systems typically do not use
-     *               those.
+     * @var string[] Absolute paths to source or tests of the project, cache
+     *               directories exlcuded because it is based on autoloading
+     *               rules and cache systems typically do not use those
      */
-    private static $internalPaths;
+    private static $internalPaths = [];
 
     /**
      * @param string $message