Merge branch '2.8' into 3.1

* 2.8:
  Fix merge
  [DI] Dont share service when no id provided
  Fix Container and PhpDumper test inaccuracies
  [DI] Fix missing new line after private alias
  [ClassLoader] Throw an exception if the cache is not writeable
  Fixing regression in TwigEngine exception handling.

Author: nicolas-grekas

src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php

@@ -717,7 +717,7 @@ private function assertUrlPackage(ContainerBuilder $container, DefinitionDecorat
 
     private function assertVersionStrategy(ContainerBuilder $container, Reference $reference, $version, $format)
     {
-        $versionStrategy = $container->getDefinition($reference);
+        $versionStrategy = $container->getDefinition((string) $reference);
         if (null === $version) {
             $this->assertEquals('assets.empty_version_strategy', (string) $reference);
         } else {

src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php

@@ -167,7 +167,7 @@ public function testAccess()
                 );
             } elseif (3 === $i) {
                 $this->assertEquals('IS_AUTHENTICATED_ANONYMOUSLY', $attributes[0]);
-                $expression = $container->getDefinition($attributes[1])->getArgument(0);
+                $expression = $container->getDefinition((string) $attributes[1])->getArgument(0);
                 $this->assertEquals("token.getUsername() matches '/^admin/'", $expression);
             }
         }

src/Symfony/Bundle/TwigBundle/TwigEngine.php

@@ -49,16 +49,12 @@ public function render($name, array $parameters = array())
         try {
             return parent::render($name, $parameters);
         } catch (\Twig_Error $e) {
-            if ($name instanceof TemplateReference) {
+            if ($name instanceof TemplateReference && !method_exists($e, 'setSourceContext')) {
                 try {
                     // try to get the real name of the template where the error occurred
                     $name = $e->getTemplateName();
                     $path = (string) $this->locator->locate($this->parser->parse($name));
-                    if (method_exists($e, 'setSourceContext')) {
-                        $e->setSourceContext(new \Twig_Source('', $name, $path));
-                    } else {
-                        $e->setTemplateName($path);
-                    }
+                    $e->setTemplateName($path);
                 } catch (\Exception $e2) {
                 }
             }

src/Symfony/Component/ClassLoader/ClassCollectionLoader.php

@@ -269,7 +269,13 @@ private static function compressCode($code)
      */
     private static function writeCacheFile($file, $content)
     {
-        $tmpFile = tempnam(dirname($file), basename($file));
+        $dir = dirname($file);
+        if (!is_writable($dir)) {
+            throw new \RuntimeException(sprintf('Cache directory "%s" is not writable.', $dir));
+        }
+
+        $tmpFile = tempnam($dir, basename($file));
+
         if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $file)) {
             @chmod($file, 0666 & ~umask());
 

src/Symfony/Component/DependencyInjection/ContainerBuilder.php

@@ -399,7 +399,7 @@ public function get($id, $invalidBehavior = ContainerInterface::EXCEPTION_ON_INV
         }
 
         if (!isset($this->definitions[$id]) && isset($this->aliasDefinitions[$id])) {
-            return $this->get($this->aliasDefinitions[$id], $invalidBehavior);
+            return $this->get((string) $this->aliasDefinitions[$id], $invalidBehavior);
         }
 
         try {
@@ -1036,14 +1036,14 @@ private function callMethod($service, $call)
     /**
      * Shares a given service in the container.
      *
-     * @param Definition $definition
-     * @param mixed      $service
-     * @param string     $id
+     * @param Definition  $definition
+     * @param mixed       $service
+     * @param string|null $id
      */
     private function shareService(Definition $definition, $service, $id)
     {
-        if ($definition->isShared()) {
-            $this->services[$lowerId = strtolower($id)] = $service;
+        if (null !== $id && $definition->isShared()) {
+            $this->services[strtolower($id)] = $service;
         }
     }
 

src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php

@@ -168,7 +168,7 @@ private function addServiceAlias($alias, $id)
             return sprintf("    %s: '@%s'\n", $alias, $id);
         }
 
-        return sprintf("    %s:\n        alias: %s\n        public: false", $alias, $id);
+        return sprintf("    %s:\n        alias: %s\n        public: false\n", $alias, $id);
     }
 
     /**

src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php

@@ -213,13 +213,13 @@ public function testCreateDefinition()
         $this->assertCount(1, $container->getDefinition('coop_tilleuls')->getArguments());
         $this->assertEquals('autowired.symfony\component\dependencyinjection\tests\compiler\dunglas', $container->getDefinition('coop_tilleuls')->getArgument(0));
 
-        $dunglasDefinition = $container->getDefinition('autowired.symfony\component\dependencyinjection\tests\compiler\dunglas');
+        $dunglasDefinition = $container->getDefinition('autowired.Symfony\Component\DependencyInjection\Tests\Compiler\Dunglas');
         $this->assertEquals(__NAMESPACE__.'\Dunglas', $dunglasDefinition->getClass());
         $this->assertFalse($dunglasDefinition->isPublic());
         $this->assertCount(1, $dunglasDefinition->getArguments());
         $this->assertEquals('autowired.symfony\component\dependencyinjection\tests\compiler\lille', $dunglasDefinition->getArgument(0));
 
-        $lilleDefinition = $container->getDefinition('autowired.symfony\component\dependencyinjection\tests\compiler\lille');
+        $lilleDefinition = $container->getDefinition('autowired.Symfony\Component\DependencyInjection\Tests\Compiler\Lille');
         $this->assertEquals(__NAMESPACE__.'\Lille', $lilleDefinition->getClass());
     }
 

src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php

@@ -132,7 +132,7 @@ public function testSet()
     {
         $sc = new Container();
         $sc->set('foo', $foo = new \stdClass());
-        $this->assertEquals($foo, $sc->get('foo'), '->set() sets a service');
+        $this->assertSame($foo, $sc->get('foo'), '->set() sets a service');
     }
 
     public function testSetWithNullResetTheService()
@@ -154,15 +154,15 @@ public function testGet()
     {
         $sc = new ProjectServiceContainer();
         $sc->set('foo', $foo = new \stdClass());
-        $this->assertEquals($foo, $sc->get('foo'), '->get() returns the service for the given id');
-        $this->assertEquals($foo, $sc->get('Foo'), '->get() returns the service for the given id, and converts id to lowercase');
-        $this->assertEquals($sc->__bar, $sc->get('bar'), '->get() returns the service for the given id');
-        $this->assertEquals($sc->__foo_bar, $sc->get('foo_bar'), '->get() returns the service if a get*Method() is defined');
-        $this->assertEquals($sc->__foo_baz, $sc->get('foo.baz'), '->get() returns the service if a get*Method() is defined');
-        $this->assertEquals($sc->__foo_baz, $sc->get('foo\\baz'), '->get() returns the service if a get*Method() is defined');
+        $this->assertSame($foo, $sc->get('foo'), '->get() returns the service for the given id');
+        $this->assertSame($foo, $sc->get('Foo'), '->get() returns the service for the given id, and converts id to lowercase');
+        $this->assertSame($sc->__bar, $sc->get('bar'), '->get() returns the service for the given id');
+        $this->assertSame($sc->__foo_bar, $sc->get('foo_bar'), '->get() returns the service if a get*Method() is defined');
+        $this->assertSame($sc->__foo_baz, $sc->get('foo.baz'), '->get() returns the service if a get*Method() is defined');
+        $this->assertSame($sc->__foo_baz, $sc->get('foo\\baz'), '->get() returns the service if a get*Method() is defined');
 
         $sc->set('bar', $bar = new \stdClass());
-        $this->assertEquals($bar, $sc->get('bar'), '->get() prefers to return a service defined with set() than one defined with a getXXXMethod()');
+        $this->assertSame($bar, $sc->get('bar'), '->get() prefers to return a service defined with set() than one defined with a getXXXMethod()');
 
         try {
             $sc->get('');

src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php

@@ -250,7 +250,7 @@ public function testOverrideServiceWhenUsingADumpedContainer()
         $container->set('bar', $bar = new \stdClass());
         $container->setParameter('foo_bar', 'foo_bar');
 
-        $this->assertEquals($bar, $container->get('bar'), '->set() overrides an already defined service');
+        $this->assertSame($bar, $container->get('bar'), '->set() overrides an already defined service');
     }
 
     public function testOverrideServiceWhenUsingADumpedContainerAndServiceIsUsedFromAnotherOne()

src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services6.yml

@@ -25,6 +25,8 @@ services:
         class: Request
         synthetic: true
         lazy: true
+    another_third_alias_for_foo:
+        alias: foo
     decorator_service:
         decorates: decorated
     decorator_service_with_name: