9 files changed, 18 insertions, 2 deletions
diff --git a/modules/gdnative/nativescript/nativescript.cpp b/modules/gdnative/nativescript/nativescript.cpp
index eb133502c4..bcaf3f346e 100644
--- a/modules/gdnative/nativescript/nativescript.cpp
+++ b/modules/gdnative/nativescript/nativescript.cpp
@@ -294,6 +294,10 @@ MethodInfo NativeScript::get_method_info(const StringName &p_method) const {
 	return MethodInfo();
 }
 
+bool NativeScript::is_valid() const {
+	return true;
+}
+
 bool NativeScript::is_tool() const {
 	NativeScriptDesc *script_data = get_script_desc();
 
diff --git a/modules/gdnative/nativescript/nativescript.h b/modules/gdnative/nativescript/nativescript.h
index 51370f5fbf..e6f3c06ee5 100644
--- a/modules/gdnative/nativescript/nativescript.h
+++ b/modules/gdnative/nativescript/nativescript.h
@@ -160,6 +160,7 @@ public:
 	virtual MethodInfo get_method_info(const StringName &p_method) const;
 
 	virtual bool is_tool() const;
+	virtual bool is_valid() const;
 
 	virtual ScriptLanguage *get_language() const;
 
diff --git a/modules/gdnative/pluginscript/pluginscript_script.h b/modules/gdnative/pluginscript/pluginscript_script.h
index 31c6c4d67f..3ade8ac004 100644
--- a/modules/gdnative/pluginscript/pluginscript_script.h
+++ b/modules/gdnative/pluginscript/pluginscript_script.h
@@ -102,6 +102,7 @@ public:
 	PropertyInfo get_property_info(const StringName &p_property) const;
 
 	bool is_tool() const { return _tool; }
+	bool is_valid() const { return true; }
 
 	virtual ScriptLanguage *get_language() const;
 
diff --git a/modules/gdscript/gdscript.cpp b/modules/gdscript/gdscript.cpp
index 1f5f5035f9..538249c8e2 100644
--- a/modules/gdscript/gdscript.cpp
+++ b/modules/gdscript/gdscript.cpp
@@ -867,7 +867,6 @@ bool GDScript::has_script_signal(const StringName &p_signal) const {
 	else if (base_cache.is_valid()) {
 		return base_cache->has_script_signal(p_signal);
 	}
-
 #endif
 	return false;
 }
diff --git a/modules/gdscript/gdscript.h b/modules/gdscript/gdscript.h
index f344beba9f..752d660ffb 100644
--- a/modules/gdscript/gdscript.h
+++ b/modules/gdscript/gdscript.h
@@ -141,7 +141,7 @@ protected:
 	static void _bind_methods();
 
 public:
-	bool is_valid() const { return valid; }
+	virtual bool is_valid() const { return valid; }
 
 	const Map<StringName, Ref<GDScript> > &get_subclasses() const { return subclasses; }
 	const Map<StringName, Variant> &get_constants() const { return constants; }
diff --git a/modules/mono/csharp_script.cpp b/modules/mono/csharp_script.cpp
index 700e518cfc..0a54ed5fbd 100644
--- a/modules/mono/csharp_script.cpp
+++ b/modules/mono/csharp_script.cpp
@@ -2571,6 +2571,10 @@ void CSharpScript::update_exports() {
 #endif
 }
 
+bool CSharpScript::is_valid() const {
+	return true; //TODO return false if invalid
+}
+
 bool CSharpScript::has_script_signal(const StringName &p_signal) const {
 	if (_signals.has(p_signal))
 		return true;
diff --git a/modules/mono/csharp_script.h b/modules/mono/csharp_script.h
index fc604df2a0..871d4d7e4c 100644
--- a/modules/mono/csharp_script.h
+++ b/modules/mono/csharp_script.h
@@ -158,6 +158,8 @@ public:
 	virtual void update_exports();
 
 	virtual bool is_tool() const { return tool; }
+	virtual bool is_valid() const;
+
 	virtual Ref<Script> get_base_script() const;
 	virtual ScriptLanguage *get_language() const;
 
diff --git a/modules/visual_script/visual_script.cpp b/modules/visual_script/visual_script.cpp
index 186e9e63b1..5b3b3a6769 100644
--- a/modules/visual_script/visual_script.cpp
+++ b/modules/visual_script/visual_script.cpp
@@ -981,6 +981,10 @@ bool VisualScript::is_tool() const {
 	return false;
 }
 
+bool VisualScript::is_valid() const {
+	return true; //always valid
+}
+
 ScriptLanguage *VisualScript::get_language() const {
 
 	return VisualScriptLanguage::singleton;
diff --git a/modules/visual_script/visual_script.h b/modules/visual_script/visual_script.h
index bd666447a3..cdc9159a73 100644
--- a/modules/visual_script/visual_script.h
+++ b/modules/visual_script/visual_script.h
@@ -341,6 +341,7 @@ public:
 	virtual Error reload(bool p_keep_state = false);
 
 	virtual bool is_tool() const;
+	virtual bool is_valid() const;
 
 	virtual ScriptLanguage *get_language() const;