Merge branch '2.3' into 2.7

* 2.3:
  [Console][DX] Fixed ambiguous error message when using a duplicate option shortcut

src/Symfony/Component/Console/Command/Command.php

@@ -297,14 +297,14 @@ class Command
             return;
         }
 
+        $this->definition->addOptions($this->application->getDefinition()->getOptions());
+
         if ($mergeArgs) {
             $currentArguments = $this->definition->getArguments();
             $this->definition->setArguments($this->application->getDefinition()->getArguments());
             $this->definition->addArguments($currentArguments);
         }
 
-        $this->definition->addOptions($this->application->getDefinition()->getOptions());
-
         $this->applicationDefinitionMerged = true;
         if ($mergeArgs) {
             $this->applicationDefinitionMergedWithArgs = true;

src/Symfony/Component/Console/Tests/ApplicationTest.php

@@ -730,6 +730,33 @@ class ApplicationTest extends \PHPUnit_Framework_TestCase
         $this->assertSame(1, $exitCode, '->run() returns exit code 1 when exception code is 0');
     }
 
+    /**
+     * @expectedException \LogicException
+     * @expectedExceptionMessage An option with shortcut "e" already exists.
+     */
+    public function testAddingOptionWithDuplicateShortcut()
+    {
+        $dispatcher = new EventDispatcher();
+        $application = new Application();
+        $application->setAutoExit(false);
+        $application->setCatchExceptions(false);
+        $application->setDispatcher($dispatcher);
+
+        $application->getDefinition()->addOption(new InputOption('--env', '-e', InputOption::VALUE_REQUIRED, 'Environment'));
+
+        $application
+            ->register('foo')
+            ->setAliases(['f'])
+            ->setDefinition(array(new InputOption('survey', 'e', InputOption::VALUE_REQUIRED, 'My option with a shortcut.')))
+            ->setCode(function (InputInterface $input, OutputInterface $output) {})
+        ;
+
+        $input = new ArrayInput(array('command' => 'foo'));
+        $output = new NullOutput();
+
+        $application->run($input, $output);
+    }
+
     /**
      * @expectedException \LogicException
      * @dataProvider getAddingAlreadySetDefinitionElementData