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https://issues.apache.org/jira/browse/ARROW-1188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16090481#comment-16090481
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Wes McKinney commented on ARROW-1188:
-------------------------------------
Confirming this bug still exists (it hits a DCHECK in debug builds). Going to
take a look
> Segfault when trying to serialize a DataFrame with Null-only Categorical
> Column
> -------------------------------------------------------------------------------
>
> Key: ARROW-1188
> URL: https://issues.apache.org/jira/browse/ARROW-1188
> Project: Apache Arrow
> Issue Type: Bug
> Reporter: Panagiotis Mavrogiorgos
> Assignee: Wes McKinney
> Fix For: 0.5.0
>
>
> {code}
> import pandas as pd
> import feather
> print("Pandas: %s" % pd.__version__)
> print("Feather: %s" % feather.version.version)
> df = pd.DataFrame({"A": (1, 2, 3), "B": ("a", "b", "c")}) # if we use this
> line everything works fine
> df = pd.DataFrame({"A": (1, 2, 3), "B": (None, None, None)})
> df = df.assign(B=df.B.astype("category"))
> #feather.write_dataframe(df, "/tmp/foo.feather") # this segfaults!
> {code}
> {code}
> Pandas: 0.19.2
> Feather: 0.4.0
> {code}
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