[Bf-blender-cvs] [9c0f11344e7] master: Fix T90564: Crash when linking 2 node inputs

[Philipp Oeser]

Commit: 9c0f11344e77eb4062ddb08502317d287cce4bc8
Author: Philipp Oeser
Date:   Tue Aug 10 10:27:57 2021 +0200
Branches: master
https://developer.blender.org/rB9c0f11344e77eb4062ddb08502317d287cce4bc8

Fix T90564: Crash when linking 2 node inputs

Caused by {rB37570a73170e}.

Above commit wasnt taking into account that at this point the link could
still be NULL.

Maniphest Tasks: T90564

Differential Revision: https://developer.blender.org/D12180

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

M	source/blender/blenkernel/intern/node.cc

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

diff --git a/source/blender/blenkernel/intern/node.cc b/source/blender/blenkernel/intern/node.cc
index 4aec5a9e667..1bf95369794 100644
--- a/source/blender/blenkernel/intern/node.cc
+++ b/source/blender/blenkernel/intern/node.cc
@@ -2364,7 +2364,7 @@ bNodeLink *nodeAddLink(
     ntree->update |= NTREE_UPDATE_LINKS;
   }
 
-  if (link->tosock->flag & SOCK_MULTI_INPUT) {
+  if (link != nullptr && link->tosock->flag & SOCK_MULTI_INPUT) {
     link->multi_input_socket_index = node_count_links(ntree, link->tosock) - 1;
   }