Fix debugger not opening built-in scripts

editor/debugger/editor_debugger_node.cpp

@@ -39,6 +39,7 @@
 #include "editor/scene_tree_dock.h"
 #include "scene/gui/menu_button.h"
 #include "scene/gui/tab_container.h"
+#include "scene/resources/packed_scene.h"
 
 template <typename Func>
 void _for_all(TabContainer *p_node, const Func &p_func) {
@@ -141,11 +142,22 @@ void EditorDebuggerNode::_error_selected(const String &p_file, int p_line, int p
 }
 
 void EditorDebuggerNode::_text_editor_stack_goto(const ScriptEditorDebugger *p_debugger) {
-	const String file = p_debugger->get_stack_script_file();
+	String file = p_debugger->get_stack_script_file();
 	if (file.is_empty()) {
 		return;
 	}
-	stack_script = ResourceLoader::load(file);
+	if (file.is_resource_file()) {
+		stack_script = ResourceLoader::load(file);
+	} else {
+		// If the script is built-in, it can be opened only if the scene is loaded in memory.
+		int i = file.find("::");
+		int j = file.rfind("(", i);
+		if (j > -1) { // If the script is named, the string is "name (file)", so we need to extract the path.
+			file = file.substr(j + 1, file.find(")", i) - j - 1);
+		}
+		Ref<PackedScene> ps = ResourceLoader::load(file.get_slice("::", 0));
+		stack_script = ResourceLoader::load(file);
+	}
 	const int line = p_debugger->get_stack_script_line() - 1;
 	emit_signal(SNAME("goto_script_line"), stack_script, line);
 	emit_signal(SNAME("set_execution"), stack_script, line);

modules/gdscript/gdscript.cpp

@@ -796,7 +796,7 @@ void GDScript::_set_subclass_path(Ref<GDScript> &p_sc, const String &p_path) {
 
 String GDScript::_get_debug_path() const {
 	if (is_built_in() && !get_name().is_empty()) {
-		return get_name() + " (" + get_path().get_slice("::", 0) + ")";
+		return get_name() + " (" + get_path() + ")";
 	} else {
 		return get_path();
 	}