When an ephemeron pair refers to an object in younger generation, and when a collection would move that object to a generation that's less the maximum target generation, the collector could sometimes mishandle the ephemeron pair by trying to register it multiple times for later handling.
When an ephemeron pair refers to an object in younger generation, and when a collection would move that object to a generation that's less the maximum target generation, the collector could sometimes mishandle the ephemeron pair by trying to register it multiple times for later handling.