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Using "Foo", a class name that corresponds to no less than 22 fixture
classes, results in the first found "Foo" being loaded when one is
found by the ClassNotFoundFatalErrorHandler error handler, I am not sure
exactly why, but it is not really a big issue because this is a fatal
error handler and execution is not supposed to continue after that.
Except that is very much the case when running the whole test suite
sequentially with ./phpunit . Then we arrive to the DI component test
suite, and a failure happens because \\foo was not supposed to be defined:

> Failed asserting that exception message 'The definition for "\foo" has
> no class attribute, and appears to reference a class or interface in the
> global namespace. Leaving out the "class" attribute is only allowed for
> namespaced classes. Please specify the class attribute explicitly to get
> rid of this error.' contains 'The definition for "\foo" has no class.'.

DebugClassLoader.php

@@ -233,7 +233,7 @@ class DebugClassLoader
         // Detect annotations on the class
         if (false !== $doc = $refl->getDocComment()) {
             foreach (['final', 'deprecated', 'internal'] as $annotation) {
-                if (false !== \strpos($doc, $annotation) && preg_match('#\n\s+\* @'.$annotation.'(?:( .+?)\.?)?\r?\n\s+\*(?: @|/$)#s', $doc, $notice)) {
+                if (false !== \strpos($doc, $annotation) && preg_match('#\n\s+\* @'.$annotation.'(?:( .+?)\.?)?\r?\n\s+\*(?: @|/$|\r?\n)#s', $doc, $notice)) {
                     self::${$annotation}[$class] = isset($notice[1]) ? preg_replace('#\.?\r?\n( \*)? *(?= |\r?\n|$)#', '', $notice[1]) : '';
                 }
             }
@@ -258,7 +258,7 @@ class DebugClassLoader
             if (!isset(self::$checkedClasses[$use])) {
                 $this->checkClass($use);
             }
-            if (isset(self::$deprecated[$use]) && \strncmp($ns, \str_replace('_', '\\', $use), $len)) {
+            if (isset(self::$deprecated[$use]) && \strncmp($ns, \str_replace('_', '\\', $use), $len) && !isset(self::$deprecated[$class])) {
                 $type = class_exists($class, false) ? 'class' : (interface_exists($class, false) ? 'interface' : 'trait');
                 $verb = class_exists($use, false) || interface_exists($class, false) ? 'extends' : (interface_exists($use, false) ? 'implements' : 'uses');
 
@@ -307,7 +307,7 @@ class DebugClassLoader
             }
 
             foreach (['final', 'internal'] as $annotation) {
-                if (false !== \strpos($doc, $annotation) && preg_match('#\n\s+\* @'.$annotation.'(?:( .+?)\.?)?\r?\n\s+\*(?: @|/$)#s', $doc, $notice)) {
+                if (false !== \strpos($doc, $annotation) && preg_match('#\n\s+\* @'.$annotation.'(?:( .+?)\.?)?\r?\n\s+\*(?: @|/$|\r?\n)#s', $doc, $notice)) {
                     $message = isset($notice[1]) ? preg_replace('#\.?\r?\n( \*)? *(?= |\r?\n|$)#', '', $notice[1]) : '';
                     self::${$annotation.'Methods'}[$class][$method->name] = [$class, $message];
                 }

Tests/ErrorHandlerTest.php

@@ -525,7 +525,7 @@ class ErrorHandlerTest extends TestCase
      */
     public function testHandleErrorException()
     {
-        $exception = new \Error("Class 'Foo' not found");
+        $exception = new \Error("Class 'IReallyReallyDoNotExistAnywhereInTheRepositoryISwear' not found");
 
         $handler = new ErrorHandler();
         $handler->setExceptionHandler(function () use (&$args) {
@@ -535,7 +535,7 @@ class ErrorHandlerTest extends TestCase
         $handler->handleException($exception);
 
         $this->assertInstanceOf('Symfony\Component\Debug\Exception\ClassNotFoundException', $args[0]);
-        $this->assertStringStartsWith("Attempted to load class \"Foo\" from the global namespace.\nDid you forget a \"use\" statement", $args[0]->getMessage());
+        $this->assertStringStartsWith("Attempted to load class \"IReallyReallyDoNotExistAnywhereInTheRepositoryISwear\" from the global namespace.\nDid you forget a \"use\" statement", $args[0]->getMessage());
     }
 
     /**

Tests/Fixtures/FinalClasses.php

@@ -30,6 +30,7 @@ class FinalClass3
 
 /**
  * @final
+ *
  * @author John Doe
  */
 class FinalClass4
@@ -63,7 +64,6 @@ class FinalClass6
  * @author John Doe
  *
  * @final another
- *
  *        multiline comment...
  *
  * @return string
@@ -76,6 +76,7 @@ class FinalClass7
 /**
  * @author John Doe
  * @final
+ *
  * @return string
  */
 class FinalClass8

Tests/Fixtures/FinalMethod.php

@@ -13,6 +13,8 @@ class FinalMethod
 
     /**
      * @final
+     *
+     * @return int
      */
     public function finalMethod2()
     {