From fc544bc974e65364b4307df35d1414f8f9e192ab Mon Sep 17 00:00:00 2001
From: Iliya Katueshenock <Moder>
Date: Sat, 12 Nov 2022 14:18:29 +0100
Subject: Fix: geometry nodes viewer shows black with dangling reroute input

Differential Revision: https://developer.blender.org/D16322
---
 source/blender/nodes/intern/geometry_nodes_lazy_function.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/source/blender/nodes/intern/geometry_nodes_lazy_function.cc b/source/blender/nodes/intern/geometry_nodes_lazy_function.cc
index 197f0997160..96c369f2f6b 100644
--- a/source/blender/nodes/intern/geometry_nodes_lazy_function.cc
+++ b/source/blender/nodes/intern/geometry_nodes_lazy_function.cc
@@ -527,7 +527,8 @@ class LazyFunctionForViewerNode : public LazyFunction {
     debug_name_ = "Viewer";
     Vector<const bNodeSocket *> dummy_used_outputs;
     lazy_function_interface_from_node(bnode, r_used_inputs, dummy_used_outputs, inputs_, outputs_);
-    if (!r_used_inputs[1]->is_directly_linked()) {
+    const Span<const bNodeLink *> links = r_used_inputs[1]->directly_linked_links();
+    if (links.is_empty() || nodeIsDanglingReroute(&bnode.owner_tree(), links.first()->fromnode)) {
       use_field_input_ = false;
       r_used_inputs.pop_last();
       inputs_.pop_last();
-- 
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