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  1. Apache Arrow
  2. ARROW-6857

[Python][C++] Segfault for dictionary_encode on empty chunked_array (edge case)

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      a reproducer is here :

      import pyarrow as pa
      aa = pa.chunked_array([pa.array(['a', 'b', 'c'])])
      aa[:0].dictionary_encode()  
      # Segmentation fault: 11
      

      For pyarrow=0.14, I could not reproduce.
      I use a conda version : "pyarrow 0.15.0 py37hdca360a_0 conda-forge"

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              apitrou Antoine Pitrou
              ArtemK Artem KOZHEVNIKOV
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