From 63035d5031d253f793dfef090322dd8fe5f297c3 Mon Sep 17 00:00:00 2001
From: Player701 <player701@player701.ru>
Date: Mon, 19 Oct 2020 12:03:03 +0300
Subject: [PATCH] - Prevent calling abstract functions via Super or parent
 class name qualifiers at compile time

---
 src/common/scripting/backend/codegen.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/common/scripting/backend/codegen.cpp b/src/common/scripting/backend/codegen.cpp
index d17c47cad3..cb9642a643 100644
--- a/src/common/scripting/backend/codegen.cpp
+++ b/src/common/scripting/backend/codegen.cpp
@@ -8546,6 +8546,13 @@ FxExpression *FxVMFunctionCall::Resolve(FCompileContext& ctx)
 		if (!result) return nullptr;
 	}
 
+	// [Player701] Catch attempts to call abstract functions directly at compile time
+	if (NoVirtual && Function->Variants[0].Implementation->VarFlags & VARF_Abstract)
+	{
+		ScriptPosition.Message(MSG_ERROR, "Cannot call abstract function %s", Function->Variants[0].Implementation->PrintableName.GetChars());
+		delete this;
+		return nullptr;
+	}
 
 	CallingFunction = ctx.Function;
 	if (ArgList.Size() > 0)