Fix T78960: 2.83.2 not opening a 2.82a project correctly.

That project cannot be opened correctly ayway, it has recursive
collections intanciating themselves...

But at least now we have a check at startup to detect and 'fix' those
nasty cycles in collections.

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/versioning_290.c b/source/blender/blenloader/intern/versioning_290.c
index ba92e11cc2a..a84d9711491 100644
--- a/source/blender/blenloader/intern/versioning_290.c
+++ b/source/blender/blenloader/intern/versioning_290.c
@@ -196,6 +196,14 @@ void do_versions_after_linking_290(Main *bmain, ReportList *UNUSED(reports))
    * \note Keep this message at the bottom of the function.
    */
   {
+    LISTBASE_FOREACH (Collection *, collection, &bmain->collections) {
+      if (BKE_collection_cycles_fix(bmain, collection)) {
+        printf(
+            "WARNING: Cycle detected in collection '%s', fixed as best as possible.\n"
+            "You may have to reconstruct your View Layers...\n",
+            collection->id.name);
+      }
+    }
     /* Keep this block, even when empty. */
   }
 }