Fix T89260: Eevee crashes with custom node sockets.

Cause of this issue is that Custom Node Sockets info type was
initialized as SOCK_FLOAT when registering. Areas within the core that
would ignore custom socket types by checking its type would use the
socket as being a float type.

When custom node sockets have a property called default_value blender
tries to store it as an internal default value what failed in debug
builds.

This patch will set the socket type to SOCK_CUSTOM when registering a
custom socket type and allow, but skip storage of custom default values.
In this case the default values should already be stored as custom
properies.

Reviewed By: campbellbarton, JacquesLucke

Maniphest Tasks: T89260

Differential Revision: https://developer.blender.org/D13174

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/node.cc b/source/blender/blenkernel/intern/node.cc
index bb1c3b30880..230f418ba4d 100644
--- a/source/blender/blenkernel/intern/node.cc
+++ b/source/blender/blenkernel/intern/node.cc
@@ -434,8 +434,10 @@ static void write_node_socket_default_value(BlendWriter *writer, bNodeSocket *so
     case SOCK_COLLECTION:
       BLO_write_struct(writer, bNodeSocketValueCollection, sock->default_value);
       break;
-    case __SOCK_MESH:
     case SOCK_CUSTOM:
+      /* Custom node sockets where default_value is defined uses custom properties for storage. */
+      break;
+    case __SOCK_MESH:
     case SOCK_SHADER:
     case SOCK_GEOMETRY:
       BLI_assert_unreachable();