Ticket #19800: 19800.check-copy.diff

wp-admin/includes/file.php

@@ -345 +345 @@
 
         // Copy the temporary file into its destination
         $new_file = $uploads['path'] . "/$filename";
-        copy( $tmp_file, $new_file );
+        if ( false === copy( $tmp_file, $new_file ) )
+                return $upload_error_handler( $file, sprintf( __('The uploaded file could not be moved to %s.' ), $uploads['path'] ) );
         unlink($tmp_file);
 
         // Set correct file permissions