Fix T101705: crash when connecting reroute to multi-input socket

Differential Revision: https://developer.blender.org/D16203

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h
index b1b4045370c..ecf7a556459 100644
--- a/source/blender/blenkernel/BKE_node.h
+++ b/source/blender/blenkernel/BKE_node.h
@@ -792,6 +792,12 @@ void nodeChainIterBackwards(const bNodeTree *ntree,
  */
 void nodeParentsIter(bNode *node, bool (*callback)(bNode *, void *), void *userdata);
 
+/**
+ * A dangling reroute node is a reroute node that does *not* have a "data source", i.e. no
+ * non-reroute node is connected to its input.
+ */
+bool nodeIsDanglingReroute(const struct bNodeTree *ntree, const struct bNode *node);
+
 struct bNodeLink *nodeFindLink(struct bNodeTree *ntree,
                                const struct bNodeSocket *from,
                                const struct bNodeSocket *to);