AlenkaF opened a new pull request, #34559:
URL: https://github.com/apache/arrow/pull/34559

   ### Rationale for this change
   Method `to_pandas` fails with `KeyError` if a table has an extension array 
as a column with extension dtype not having `to_pandas_dtype` defined. In this 
cases we should fall back to storage type of the extension array.
   
   ### What changes are included in this PR?
   Changes in `arrow_to_pandas.cc` at:
   - `GetBlockType` for `ConvertTableToPandas`
   - `ConvertChunkedArrayToPandas`


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