[BUGFIX] Cache missing class information only in productive context

To improve cache handling during development, missing class information
shouldn't be cached anymore. Otherwise each time a class was misspelled
and not found we have to clear the classes_cache.

Resolves: #61475
Releases: 6.3, 6.2
Change-Id: I7de24348e84bd89afd81164b90f776a996fcb8d9
Reviewed-on: http://review.typo3.org/32685


Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>

typo3/sysext/core/Classes/Core/ClassLoader.php

@@ -27,6 +27,11 @@ class ClassLoader {
 
 	const VALID_CLASSNAME_PATTERN = '/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9\\\\_\x7f-\xff]*$/';
 
+	/**
+	 * @var ApplicationContext
+	 */
+	protected $context;
+
 	/**
 	 * @var ClassAliasMap
 	 */
@@ -93,6 +98,7 @@ class ClassLoader {
 	 * @param ApplicationContext $context
 	 */
 	public function __construct(ApplicationContext $context) {
+		$this->context = $context;
 		$this->classesCache = new Cache\Frontend\StringFrontend('cache_classes', new Cache\Backend\TransientMemoryBackend($context));
 	}
 
@@ -241,8 +247,10 @@ class ClassLoader {
 					$this->isEarlyCache ? array('early') : array()
 				);
 			} elseif (!$this->isEarlyCache) {
-				// Cache that the class is unknown
-				$this->classesCache->set($cacheEntryIdentifier, '');
+				if ($this->context->isProduction()) {
+					// Cache that the class is unknown
+					$this->classesCache->set($cacheEntryIdentifier, '');
+				}
 			}
 		}