bug symfony#20598 [DI] Aliases should preserve the aliased invalid behavior (nicolas-grekas)

This PR was merged into the 2.7 branch.

Discussion
----------

[DI] Aliases should preserve the aliased invalid behavior

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
-------

7752308 [DI] Aliases should preserve the aliased invalid behavior

Author: fabpot

src/Symfony/Component/DependencyInjection/ContainerBuilder.php

@@ -430,7 +430,7 @@ public function get($id, $invalidBehavior = ContainerInterface::EXCEPTION_ON_INV
         }
 
         if (!array_key_exists($id, $this->definitions) && isset($this->aliasDefinitions[$id])) {
-            return $this->get($this->aliasDefinitions[$id]);
+            return $this->get($this->aliasDefinitions[$id], $invalidBehavior);
         }
 
         try {

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

@@ -231,6 +231,18 @@ public function testSetReplacesAlias()
         $this->assertSame($foo, $builder->get('alias'), '->set() replaces an existing alias');
     }
 
+    public function testAliasesKeepInvalidBehavior()
+    {
+        $builder = new ContainerBuilder();
+
+        $aliased = new Definition('stdClass');
+        $aliased->addMethodCall('setBar', array(new Reference('bar', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)));
+        $builder->setDefinition('aliased', $aliased);
+        $builder->setAlias('alias', 'aliased');
+
+        $this->assertEquals(new \stdClass(), $builder->get('alias'));
+    }
+
     public function testAddGetCompilerPass()
     {
         $builder = new ContainerBuilder();