Fix bug when channels: ~ or channels: [] is used

Author: Seldaek

DependencyInjection/Compiler/LoggerChannelPass.php

@@ -95,7 +95,7 @@ protected function processChannels($configuration)
         }
 
         if ('inclusive' === $configuration['type']) {
-            return $configuration['elements'];
+            return $configuration['elements'] ?: $this->channels;
         }
 
         return array_diff($this->channels, $configuration['elements']);

DependencyInjection/Configuration.php

@@ -492,6 +492,10 @@ public function getConfigTreeBuilder()
                                             }
                                         }
 
+                                        if (!count($elements)) {
+                                            return null;
+                                        }
+
                                         return array('type' => $isExclusive ? 'exclusive' : 'inclusive', 'elements' => $elements);
                                     })
                                 ->end()

DependencyInjection/MonologExtension.php

@@ -57,7 +57,7 @@ public function load(array $configs, ContainerBuilder $container)
             foreach ($config['handlers'] as $name => $handler) {
                 $handlers[$handler['priority']][] = array(
                     'id'       => $this->buildHandler($container, $name, $handler),
-                    'channels' => isset($handler['channels']) ? $handler['channels'] : null
+                    'channels' => empty($handler['channels']) ? null : $handler['channels'] : null
                 );
             }