jackylee-ch commented on PR #9841:
URL: https://github.com/apache/paimon/pull/9841#issuecomment-5761322671

   Added the filter — `build_scan_request` clones it next to the projection, so 
`VortexReaderFactory` now closes the predicate. That was the larger half: the 
un-freed top-level handle held `Arc`s over the whole tree.
   
   I wrote three pointer-level cases and deleted two: `into_raw` is never null 
on success and a zero return always carries a pending exception, so 
`isNotZero()` has no failure mode. The twelve `VortexPredicateConverterTest` 
round-trips already cover the contract end to end.
   
   What I kept pins the new hazard: `rootPtr` is freed outside any 
`Expression`, so closing a column must free exactly once.
   


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