From 48d1bfa59fe910746ade2e56392965eb1939bcff Mon Sep 17 00:00:00 2001
From: Michael Hansen <zrax0111@gmail.com>
Date: Tue, 6 Aug 2024 08:20:25 -0700
Subject: [PATCH] Fix a null dereference.

Fixes #486
---
 ASTree.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ASTree.cpp b/ASTree.cpp
index 9ddea07..6db9195 100644
--- a/ASTree.cpp
+++ b/ASTree.cpp
@@ -396,7 +396,7 @@ PycRef<ASTNode> BuildFromCode(PycRef<PycCode> code, PycModule* mod)
             {
                 // if class is a closure code, ignore this tuple
                 PycRef<ASTNode> tos = stack.top();
-                if (tos->type() == ASTNode::NODE_LOADBUILDCLASS) {
+                if (tos && tos->type() == ASTNode::NODE_LOADBUILDCLASS) {
                     break;
                 }