================
@@ -106,6 +120,63 @@ class LifetimeChecker {
                                      /*ConfidenceLevel=*/CurConfidence};
   }
 
+  void checkEscape(const OriginEscapesFact *OEF,
----------------
usx95 wrote:

I think if we correctly use the liveness information, `checkExpiry` can deal 
with `use-after-return` as well. 
`Liveness` can tell the if origin is live because of an `OriginEscape`, we can 
mark the loan with a  use-after-return violation.

https://github.com/llvm/llvm-project/pull/165370
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