Fix #29689, #29702: cycles render crash with node setups with non-cycles nodes,

after group socket refactoring.

1 files changed, 7 insertions, 3 deletions

diff --git a/intern/cycles/blender/blender_shader.cpp b/intern/cycles/blender/blender_shader.cpp
index 5c39a3f169d..f32d2d9a2ce 100644
--- a/intern/cycles/blender/blender_shader.cpp
+++ b/intern/cycles/blender/blender_shader.cpp
@@ -597,10 +597,14 @@ static void add_nodes(BL::BlendData b_data, ShaderGraph *graph, BL::ShaderNodeTr
 		else
 			to_pair = sockets_map[b_to_sock.ptr.data];
 
-		ShaderOutput *output = from_pair.first->output(from_pair.second.c_str());
-		ShaderInput *input = to_pair.first->input(to_pair.second.c_str());
+		/* either node may be NULL when the node was not exported, typically
+		   because the node type is not supported */
+		if(from_pair.first && to_pair.first) {
+			ShaderOutput *output = from_pair.first->output(from_pair.second.c_str());
+			ShaderInput *input = to_pair.first->input(to_pair.second.c_str());
 
-		graph->connect(output, input);
+			graph->connect(output, input);
+		}
 	}
 }