Fix: Viewer node crashes when the editor is pinned and has no Object ID #107737
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Reference: blender/blender#107737
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Delete Branch "LukasTonne/blender:fix_viewer_node_in_pinned_editor"
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This case was not properly handled by the previous fix in #107621.
The viewer node path function still assumes that the node editor space
has a valid ID pointer (
snode.id
) and that it is anObject
.The ID pointer can be null when setting a pinned node tree through the
python API, like so:
In this case the
ED_node_tree_start
function is called without and IDpointer, which is allowed! This patch makes sure that the viewer node
path function is only used with a valid object context.
Small repro file:
@ -30,3 +29,1 @@
IDViewerPathElem *id_elem = BKE_viewer_path_elem_new_id();
id_elem->id = &ob->id;
BLI_addtail(&r_dst.path, id_elem);
if (snode.id != nullptr && GS(snode.id->name) == ID_OB) {
Better check for this in the caller and only add an assert here. It's not possible to build a viewer path for a geometry node when parts of the context path (including the object and modifier) are missing.
@ -355,3 +360,3 @@
ViewerPath tmp_viewer_path;
BLI_SCOPED_DEFER([&]() { BKE_viewer_path_clear(&tmp_viewer_path); });
viewer_path_for_geometry_node(snode, *possible_viewer, tmp_viewer_path);
if (snode.id != nullptr && GS(snode.id->name) == ID_OB) {
Return early when the
snode.id
is invalid.It looks to me like the rest of the function should still run even if the viewer path is not valid?
I think the function isn't able to find the viewer node if the
snode.id
is invalid. So there isn't really a point in running the rest of the function, is there?Oh i was looking at the other caller, they look so similar (
tmp_viewer_path
vsnew_viewer_path
). Will fix.Fix: Viewer node crashes when the editor is pinned and has no Object ID.to Fix: Viewer node crashes when the editor is pinned and has no Object ID