Merge branch '2.8'

* 2.8:
  asset test coverage
  [HttpKernel] PostResponseEvent should extend the KernelEvent
  [travis] session.gc_probability=0 to fix transient tests on hhvm
  Write the log message on a single line againn
  [DI] Deprecate ContainerAware in favor of ContainerAwareTrait
  [VarDumper] Deprecate VarDumperTestCase in favor of the trait
  Check whether $this->logger is not null on GuardAuthenticationListener
  [Console] Add progress indicator helper

Conflicts:
	.travis.yml

1 files changed, 3 insertions, 1 deletions

diff --git a/Guard/Firewall/GuardAuthenticationListener.php b/Guard/Firewall/GuardAuthenticationListener.php
index 0ac7c12..ed0a36e 100644
--- a/Guard/Firewall/GuardAuthenticationListener.php
+++ b/Guard/Firewall/GuardAuthenticationListener.php
@@ -77,7 +77,9 @@ class GuardAuthenticationListener implements ListenerInterface
             $this->executeGuardAuthenticator($uniqueGuardKey, $guardAuthenticator, $event);
 
             if ($event->hasResponse()) {
-                $this->logger->debug(sprintf('The "%s" authenticator set the response. Any later authenticator will not be called', get_class($guardAuthenticator)));
+                if (null !== $this->logger) {
+                    $this->logger->debug(sprintf('The "%s" authenticator set the response. Any later authenticator will not be called', get_class($guardAuthenticator)));
+                }
 
                 break;
             }