From 4b2fc3667158858c5cfb1fc9e8aafdcae02ff72d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lukas=20T=C3=B6nne?= <lukas@blender.org>
Date: Wed, 2 Apr 2025 12:02:41 +0200
Subject: [PATCH] Fix missing topology cache in during node tree updates

Under some circumstances the `value_task` run by node tree updates
needs access to a node group topology cache. Unlike the `usage_task`
it was not ensuring the cache for the node group, so a stale cache
could be used (triggers assert).

Pull Request: https://projects.blender.org/blender/blender/pulls/136878
---
 source/blender/nodes/intern/socket_usage_inference.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/blender/nodes/intern/socket_usage_inference.cc b/source/blender/nodes/intern/socket_usage_inference.cc
index a911dfcd2fe..45818425dc5 100644
--- a/source/blender/nodes/intern/socket_usage_inference.cc
+++ b/source/blender/nodes/intern/socket_usage_inference.cc
@@ -600,6 +600,7 @@ struct SocketUsageInferencer {
       all_socket_values_.add_new(socket, nullptr);
       return;
     }
+    group->ensure_topology_cache();
     if (group->has_available_link_cycle()) {
       all_socket_values_.add_new(socket, nullptr);
       return;