composer update

vendor/symfony/console/Command/Command.php

@@ -40,8 +40,8 @@ class Command
     private $aliases = [];
     private $definition;
     private $hidden = false;
-    private $help;
-    private $description;
+    private $help = '';
+    private $description = '';
     private $ignoreValidationErrors = false;
     private $applicationDefinitionMerged = false;
     private $applicationDefinitionMergedWithArgs = false;
@@ -105,7 +105,7 @@ class Command
     /**
      * Gets the helper set.
      *
-     * @return HelperSet A HelperSet instance
+     * @return HelperSet|null A HelperSet instance
      */
     public function getHelperSet()
     {
@@ -115,7 +115,7 @@ class Command
     /**
      * Gets the application instance for this command.
      *
-     * @return Application An Application instance
+     * @return Application|null An Application instance
      */
     public function getApplication()
     {
@@ -150,7 +150,7 @@ class Command
      * execute() method, you set the code to execute by passing
      * a Closure to the setCode() method.
      *
-     * @return int|null null or 0 if everything went fine, or an error code
+     * @return int 0 if everything went fine, or an exit code
      *
      * @throws LogicException When this abstract method is not implemented
      *
@@ -253,6 +253,10 @@ class Command
             $statusCode = ($this->code)($input, $output);
         } else {
             $statusCode = $this->execute($input, $output);
+
+            if (!\is_int($statusCode)) {
+                @trigger_error(sprintf('Return value of "%s::execute()" should always be of the type int since Symfony 4.4, %s returned.', \get_class($this), \gettype($statusCode)), E_USER_DEPRECATED);
+            }
         }
 
         return is_numeric($statusCode) ? (int) $statusCode : 0;
@@ -339,6 +343,10 @@ class Command
      */
     public function getDefinition()
     {
+        if (null === $this->definition) {
+            throw new LogicException(sprintf('Command class "%s" is not correctly initialized. You probably forgot to call the parent constructor.', \get_class($this)));
+        }
+
         return $this->definition;
     }
 
@@ -441,7 +449,7 @@ class Command
     /**
      * Returns the command name.
      *
-     * @return string The command name
+     * @return string|null
      */
     public function getName()
     {