Merge branch '4.0' into 4.1

* 4.0:
  [DI] Fix bad exception on uninitialized references to non-shared services
  [HttpFoundation] Fix perf issue during MimeTypeGuesser intialization

Author: nicolas-grekas

Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php

@@ -11,7 +11,6 @@
 
 namespace Symfony\Component\DependencyInjection\Compiler;
 
-use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Reference;
@@ -31,9 +30,6 @@ protected function processValue($value, $isRoot = false)
         if (ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE >= $value->getInvalidBehavior() && !$this->container->has($id = (string) $value)) {
             throw new ServiceNotFoundException($id, $this->currentId);
         }
-        if (ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE === $value->getInvalidBehavior() && $this->container->has($id = (string) $value) && !$this->container->findDefinition($id)->isShared()) {
-            throw new InvalidArgumentException(sprintf('Invalid ignore-on-uninitialized reference found in service "%s": target service "%s" is not shared.', $this->currentId, $id));
-        }
 
         return $value;
     }

Dumper/PhpDumper.php

@@ -1660,6 +1660,9 @@ private function getServiceCall(string $id, Reference $reference = null): string
         if ($this->container->hasDefinition($id) && ($definition = $this->container->getDefinition($id)) && !$definition->isSynthetic()) {
             if (null !== $reference && ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE === $reference->getInvalidBehavior()) {
                 $code = 'null';
+                if (!$definition->isShared()) {
+                    return $code;
+                }
             } elseif ($this->isTrivialInstance($definition)) {
                 $code = substr($this->addNewInstance($definition, '', '', $id), 8, -2);
                 if ($definition->isShared()) {

Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php

@@ -68,27 +68,6 @@ public function testProcessThrowsExceptionOnInvalidReferenceFromInlinedDefinitio
         $this->process($container);
     }
 
-    /**
-     * @expectedException \Symfony\Component\DependencyInjection\Exception\InvalidArgumentException
-     * @expectedExceptionMessage Invalid ignore-on-uninitialized reference found in service
-     */
-    public function testProcessThrowsExceptionOnNonSharedUninitializedReference()
-    {
-        $container = new ContainerBuilder();
-
-        $container
-            ->register('a', 'stdClass')
-            ->addArgument(new Reference('b', $container::IGNORE_ON_UNINITIALIZED_REFERENCE))
-        ;
-
-        $container
-            ->register('b', 'stdClass')
-            ->setShared(false)
-        ;
-
-        $this->process($container);
-    }
-
     public function testProcessDefinitionWithBindings()
     {
         $container = new ContainerBuilder();