Backport rewriting error suppression operator

Author: thekid

src/main/php/io/Path.class.php

@@ -198,8 +198,9 @@ private static function real0($path, $wd) {
       } else {
         $normalized.= DIRECTORY_SEPARATOR.$component;
         if ($check) {
-          $stat= @lstat($normalized);
+          $stat= lstat($normalized);
           if (false === $stat) {
+            \xp::gc(__FILE__);
             $check= false;
           } else if (0120000 === ($stat[2] & 0120000)) {
             $normalized= readlink($normalized);

src/main/php/lang/FileSystemClassLoader.class.php

@@ -153,7 +153,9 @@ public static function instanceFor($path, $expand= true) {
    */
   public function packageContents($package) {
     $contents= [];
-    if ($d= @dir($this->path.strtr($package, '.', DIRECTORY_SEPARATOR))) {
+    $path= $this->path.strtr($package, '.', DIRECTORY_SEPARATOR);
+    if (is_dir($path)) {
+      $d= dir($path);
       while ($e= $d->read()) {
         if ('.' != $e{0}) $contents[]= $e.(is_dir($d->path.DIRECTORY_SEPARATOR.$e) ? '/' : '');
       }

src/main/php/lang/XPClass.class.php

@@ -587,8 +587,8 @@ public function hasAnnotation($name, $key= null): bool {
     $details= self::detailsForClass($this->name);
 
     return $details && ($key 
-      ? @array_key_exists($key, @$details['class'][DETAIL_ANNOTATIONS][$name]) 
-      : @array_key_exists($name, @$details['class'][DETAIL_ANNOTATIONS])
+      ? array_key_exists($key, $details['class'][DETAIL_ANNOTATIONS][$name] ?? []) 
+      : array_key_exists($name, $details['class'][DETAIL_ANNOTATIONS] ?? [])
     );
   }
 
@@ -603,8 +603,8 @@ public function hasAnnotation($name, $key= null): bool {
   public function getAnnotation($name, $key= null) {
     $details= self::detailsForClass($this->name);
     if (!$details || !($key 
-      ? @array_key_exists($key, @$details['class'][DETAIL_ANNOTATIONS][$name]) 
-      : @array_key_exists($name, @$details['class'][DETAIL_ANNOTATIONS])
+      ? array_key_exists($key, $details['class'][DETAIL_ANNOTATIONS][$name] ?? []) 
+      : array_key_exists($name, $details['class'][DETAIL_ANNOTATIONS] ?? [])
     )) {
       throw new ElementNotFoundException('Annotation "'.$name.($key ? '.'.$key : '').'" does not exist');
     }