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  1. Apache Arrow
  2. ARROW-12487

[C++][Dataset] ScanBatches() hangs if there's an error during scanning

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    Description

      Errors during scanning aren't properly reported, causing the iterator to hang forever.

      This affects ScanBatches() and anything built on top of it (Python to_batches, TakeRows, etc)

      Verified on the 4.0.0 RC

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              lidavidm David Li
              lidavidm David Li
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