Do not recheck $cacheData. Move if($reuseExisting) under if($cacheData).

lib/files/cache/scanner.php

@@ -105,39 +105,39 @@ class Scanner extends BasicEmitter {
 				$cacheData = $this->cache->get($file);
 				if ($cacheData) {
 					$this->permissionsCache->remove($cacheData['fileid']);
-				}
-				if ($reuseExisting and $cacheData) {
-					// prevent empty etag
-					$etag = $cacheData['etag'];
-					$propagateETagChange = false;
-					if (empty($etag)) {
-						$etag = $data['etag'];
-						$propagateETagChange = true;
-					}
-					// only reuse data if the file hasn't explicitly changed
-					if (isset($data['mtime']) && isset($cacheData['mtime']) && $data['mtime'] === $cacheData['mtime']) {
-						if (($reuseExisting & self::REUSE_SIZE) && ($data['size'] === -1)) {
-							$data['size'] = $cacheData['size'];
+					if ($reuseExisting) {
+						// prevent empty etag
+						$etag = $cacheData['etag'];
+						$propagateETagChange = false;
+						if (empty($etag)) {
+							$etag = $data['etag'];
+							$propagateETagChange = true;
 						}
-						if ($reuseExisting & self::REUSE_ETAG) {
-							$data['etag'] = $etag;
-							if ($propagateETagChange) {
-								$parent = $file;
-								while ($parent !== '') {
-									$parent = dirname($parent);
-									if ($parent === '.') {
-										$parent = '';
+						// only reuse data if the file hasn't explicitly changed
+						if (isset($data['mtime']) && isset($cacheData['mtime']) && $data['mtime'] === $cacheData['mtime']) {
+							if (($reuseExisting & self::REUSE_SIZE) && ($data['size'] === -1)) {
+								$data['size'] = $cacheData['size'];
+							}
+							if ($reuseExisting & self::REUSE_ETAG) {
+								$data['etag'] = $etag;
+								if ($propagateETagChange) {
+									$parent = $file;
+									while ($parent !== '') {
+										$parent = dirname($parent);
+										if ($parent === '.') {
+											$parent = '';
+										}
+										$parentCacheData = $this->cache->get($parent);
+										$this->cache->update($parentCacheData['fileid'], array(
+											'etag' => $this->storage->getETag($parent),
+										));
 									}
-									$parentCacheData = $this->cache->get($parent);
-									$this->cache->update($parentCacheData['fileid'], array(
-										'etag' => $this->storage->getETag($parent),
-									));
 								}
 							}
 						}
+						// Only update metadata that has changed
+						$newData = array_diff($data, $cacheData);
 					}
-					// Only update metadata that has changed
-					$newData = array_diff($data, $cacheData);
 				}
 				if (!empty($newData)) {
 					$this->cache->put($file, $newData);