### Godot version

4.2 (c5da2e54fe50cad34b5f93fa10538978b33af88d)

### System information

Windows 11

### Issue description

Attempting to run a scene with the following script report Identifier not found error:

![image](https://github.com/godotengine/godot/assets/3036176/3a63b930-0588-499d-80a2-4f88f5f07116)

This does not happen on 4.1.1 so this is a regression.

### Steps to reproduce

Create a script derived from Control and try to get access to the mouse_entered signal.

### Minimal reproduction project

[TestBug.zip](https://github.com/godotengine/godot/files/12237764/TestBug.zip)

return ERR_ALREADY_EXISTS;
		}
	}
	GDScriptDataType base_type = _gdtype_from_datatype(p_class->base_type, p_script);
	int native_idx = GDScriptLanguage::get_singleton()->get_global_map()[base_type.native_type];
	p_script->native = GDScriptLanguage::get_singleton()->get_global_array()[native_idx];
	ERR_FAIL_COND_V(p_script->native.is_null(), ERR_BUG);
	
	switch (base_type.kind) {
		case GDScriptDataType::NATIVE:
			
			break;
		case GDScriptDataType::GDSCRIPT: {
			Ref<GDScript> base = Ref<GDScript>(base_type.script_type);
			if (base.is_null()) {
				return ERR_COMPILATION_FAILED;
			}
			if (main_script->has_class(base.ptr())) {
				Error err = _populate_class_members(base.ptr(), p_class->base_type.class_type, p_keep_state);
				if (err) {
					return err;
				}
			} else if (!base->is_valid()) {
				Error err = OK;
				Ref<GDScript> base_root = GDScriptCache::get_shallow_script(base->path, err, p_script->path);
				if (err) {
					_set_error(vformat(R"(Could not parse base class "%s" from "%s": %s)", base->fully_qualified_name, base->path, error_names[err]), nullptr);
					return err;
				}
				if (base_root.is_valid()) {