Commit: 36f0a1ead7ce59f6dd62e7fd032a28c49ae9a932
Author: Philipp Oeser
Date:   Mon Jan 18 18:34:26 2021 +0100
Branches: blender-v2.92-release
https://developer.blender.org/rB36f0a1ead7ce59f6dd62e7fd032a28c49ae9a932

Fix T84823: crash rendering with unconnected input socket in File Output node

Caused by rB957e292c5864.

Now just skip unconnected sockets.

Maniphest Tasks: T84823

Differential Revision: https://developer.blender.org/D10137

===================================================================

M       source/blender/compositor/operations/COM_OutputFileOperation.cpp

===================================================================

diff --git a/source/blender/compositor/operations/COM_OutputFileOperation.cpp 
b/source/blender/compositor/operations/COM_OutputFileOperation.cpp
index 0a7e238fed1..2f8740081a1 100644
--- a/source/blender/compositor/operations/COM_OutputFileOperation.cpp
+++ b/source/blender/compositor/operations/COM_OutputFileOperation.cpp
@@ -341,6 +341,10 @@ StampData 
*OutputOpenExrMultiLayerOperation::createStampData() const
   render_result.stamp_data = stamp_data;
   for (int i = 0; i < this->m_layers.size(); i++) {
     const OutputOpenExrLayer *layer = &this->m_layers[i];
+    /* Skip unconnected sockets. */
+    if (layer->imageInput == nullptr) {
+      continue;
+    }
     std::unique_ptr<MetaData> meta_data = layer->imageInput->getMetaData();
     if (meta_data) {
       blender::StringRef layer_name = 
blender::BKE_cryptomatte_extract_layer_name(

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