My question was about the nature of a memory-managed language causing "leaks or stale objects or other logic bugs". This issue is not that - this is due to a bu

My question was about the nature of a memory-managed language causing "leaks or stale objects or other logic bugs". This issue is not that - this is due to a buggy implementation causing memory leaks. To be more precise: this is a bug, that was fixable, in the runtime, not in user applications that would run on top of it. Assume a well-designed memory-safe language and implementation. What kinds of memory hazards are there?