The world engine's retract() was rewritten from recursive child-retraction to an explicit stack-based loop using beginRetract and a while loop, avoiding stack depth issues on deeply nested workflow fact trees.
World engine retract() made iterative
The workflow engine's retract now loops instead of recursing, avoiding stack limits on deep fact trees.
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
WorkflowsArea: what it touches
Internal ChangesKind: in v2.1.257,
Internal ChangesSection of the release