Fix fatal error when logging console.error without a command

src/Symfony/Component/Console/EventListener/ExceptionListener.php

@@ -39,7 +39,11 @@ class ExceptionListener implements EventSubscriberInterface
 
         $error = $event->getError();
 
-        $this->logger->error('Error thrown while running command "{command}". Message: "{message}"', array('error' => $error, 'command' => $this->getInputString($event), 'message' => $error->getMessage()));
+        if (!$inputString = $this->getInputString($event)) {
+            return $this->logger->error('An error occurred while using the console. Message: "{message}"', array('error' => $error, 'message' => $error->getMessage()));
+        }
+
+        $this->logger->error('Error thrown while running command "{command}". Message: "{message}"', array('error' => $error, 'command' => $inputString, 'message' => $error->getMessage()));
     }
 
     public function onConsoleTerminate(ConsoleTerminateEvent $event)
@@ -54,7 +58,11 @@ class ExceptionListener implements EventSubscriberInterface
             return;
         }
 
-        $this->logger->error('Command "{command}" exited with code "{code}"', array('command' => $this->getInputString($event), 'code' => $exitCode));
+        if (!$inputString = $this->getInputString($event)) {
+            return $this->logger->error('The console exited with code "{code}"', array('code' => $exitCode));
+        }
+
+        $this->logger->error('Command "{command}" exited with code "{code}"', array('command' => $inputString, 'code' => $exitCode));
     }
 
     public static function getSubscribedEvents()
@@ -67,11 +75,15 @@ class ExceptionListener implements EventSubscriberInterface
 
     private static function getInputString(ConsoleEvent $event)
     {
-        $commandName = $event->getCommand()->getName();
+        $commandName = $event->getCommand() ? $event->getCommand()->getName() : null;
         $input = $event->getInput();
 
         if (method_exists($input, '__toString')) {
-            return str_replace(array("'$commandName'", "\"$commandName\""), $commandName, (string) $input);
+            if ($commandName) {
+                return str_replace(array("'$commandName'", "\"$commandName\""), $commandName, (string) $input);
+            }
+
+            return (string) $input;
         }
 
         return $commandName;

src/Symfony/Component/Console/Tests/EventListener/ExceptionListenerTest.php

@@ -19,6 +19,7 @@ use Symfony\Component\Console\Event\ConsoleTerminateEvent;
 use Symfony\Component\Console\EventListener\ExceptionListener;
 use Symfony\Component\Console\Input\ArgvInput;
 use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Input\Input;
 use Symfony\Component\Console\Input\StringInput;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -37,7 +38,22 @@ class ExceptionListenerTest extends TestCase
         ;
 
         $listener = new ExceptionListener($logger);
-        $listener->onConsoleError($this->getConsoleErrorEvent($exception, new ArgvInput(array('console.php', 'test:run', '--foo=baz', 'buzz')), 1));
+        $listener->onConsoleError($this->getConsoleErrorEvent($exception, new ArgvInput(array('console.php', 'test:run', '--foo=baz', 'buzz')), 1, new Command('test:run')));
+    }
+
+    public function testOnConsoleErrorWithNoCommandAndNoInputString()
+    {
+        $exception = new \RuntimeException('An error occurred');
+
+        $logger = $this->getLogger();
+        $logger
+            ->expects($this->once())
+            ->method('error')
+            ->with('An error occurred while using the console. Message: "{message}"', array('error' => $exception, 'message' => 'An error occurred'))
+        ;
+
+        $listener = new ExceptionListener($logger);
+        $listener->onConsoleError($this->getConsoleErrorEvent($exception, new NonStringInput(), 1));
     }
 
     public function testOnConsoleTerminateForNonZeroExitCodeWritesToLog()
@@ -109,9 +125,9 @@ class ExceptionListenerTest extends TestCase
         return $this->getMockForAbstractClass(LoggerInterface::class);
     }
 
-    private function getConsoleErrorEvent(\Exception $exception, InputInterface $input, $exitCode)
+    private function getConsoleErrorEvent(\Exception $exception, InputInterface $input, $exitCode, Command $command = null)
     {
-        return new ConsoleErrorEvent($input, $this->getOutput(), $exception, $exitCode, new Command('test:run'));
+        return new ConsoleErrorEvent($input, $this->getOutput(), $exception, $exitCode, $command);
     }
 
     private function getConsoleTerminateEvent(InputInterface $input, $exitCode)
@@ -124,3 +140,22 @@ class ExceptionListenerTest extends TestCase
         return $this->getMockBuilder(OutputInterface::class)->getMock();
     }
 }
+
+class NonStringInput extends Input
+{
+    public function getFirstArgument()
+    {
+    }
+
+    public function hasParameterOption($values, $onlyParams = false)
+    {
+    }
+
+    public function getParameterOption($values, $default = false, $onlyParams = false)
+    {
+    }
+
+    public function parse()
+    {
+    }
+}