no more time error, fixes #2892

core/variant_parser.cpp

@@ -468,7 +468,7 @@ Error VariantParser::parse_value(Token& token,Variant &value,Stream *p_stream,in
 				return err;
 
 			if (args.size()!=4) {
-				r_err_str="Expected 2 arguments for constructor";
+				r_err_str="Expected 4 arguments for constructor";
 			}
 
 			value=Rect2(args[0],args[1],args[2],args[3]);

tools/editor/editor_file_dialog.cpp

@@ -6,6 +6,8 @@
 #include "editor_resource_preview.h"
 #include "editor_settings.h"
 #include "scene/gui/margin_container.h"
+#include "os/file_access.h"
+
 EditorFileDialog::GetIconFunc EditorFileDialog::get_icon_func=NULL;
 EditorFileDialog::GetIconFunc EditorFileDialog::get_large_icon_func=NULL;
 
@@ -194,6 +196,9 @@ void EditorFileDialog::_thumbnail_done(const String& p_path,const Ref<Texture>&
 
 void EditorFileDialog::_request_single_thumbnail(const String& p_path) {
 
+	if (!FileAccess::exists(p_path))
+		return;
+
 	EditorResourcePreview::get_singleton()->queue_resource_preview(p_path,this,"_thumbnail_done",p_path);
 	//print_line("want file "+p_path);
 	set_process(true);