hcrosse opened a new pull request, #1540:
URL: https://github.com/apache/arrow-go/pull/1540

   ### Rationale for this change
   
   Wrapping dictionary storage panics or silently loses its dictionary.
   
   ### What changes are included in this PR?
   
   I retain the storage dictionary with `SetDictionary`, as 
`ExtensionArrayBase.setData` already does.
   
   ### Are these changes tested?
   
   `TestNewExtensionArrayWithStorageKeepsDictionary` fails on main and passes 
with this change. It checks independent lifetimes by validating the extension, 
releasing it, then validating the original storage. A checked allocator 
confirms that all memory is released.
   
   With Go 1.26.10, vet, `go test -race -tags assert,test ./arrow/...` with 
pinned `arrow-testing` and `parquet-testing` data, `golangci-lint` 2.13.2 and 
the Release Audit Tool passed.
   
   ### Are there any user-facing changes?
   
   Yes. `NewExtensionArrayWithStorage` preserves the storage dictionary. There 
is no API change.
   
   Closes https://github.com/apache/arrow-go/issues/1535.
   


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