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  1. Apache Arrow
  2. ARROW-5873

[Python] Segmentation fault when comparing schema with None

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      When comparing a schema with a Python None I get a segmentation fault.

      This is a regression to 0.13.0

      In [2]: import pyarrow as pa
      
      In [3]: pa.schema([pa.field("something", pa.int64())]).equals(None)
      [1]    82085 segmentation fault  ipython
      

      System information:
      System Version: macOS 10.13.6 (17G6030)
      Kernel Version: Darwin 17.7.0
      Python 3.6.7

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            jorisvandenbossche Joris Van den Bossche Assign to me
            fjetter Florian Jetter
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