[jira] [Assigned] (ARROW-13104) [C++] ByteStreamSplit implementation uses invalid pointer cast

["Antoine Pitrou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-13104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou reassigned ARROW-13104:
--------------------------------------

    Assignee: Antoine Pitrou

> [C++] ByteStreamSplit implementation uses invalid pointer cast
> --------------------------------------------------------------
>
>                 Key: ARROW-13104
>                 URL: https://issues.apache.org/jira/browse/ARROW-13104
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Antoine Pitrou
>            Assignee: Antoine Pitrou
>            Priority: Major
>
> This code in {{src/parquet/encoding.cc}}:
> {code:c++}
> template <>
> void ByteStreamSplitEncoder<FloatType>::PutArrowArray(const ::arrow::Array& values) {
>   DirectPutImpl<::arrow::FloatArray>(values,
>                                      reinterpret_cast<::arrow::BufferBuilder*>(&values_));
> }
> template <>
> void ByteStreamSplitEncoder<DoubleType>::PutArrowArray(const ::arrow::Array& values) {
>   DirectPutImpl<::arrow::DoubleArray>(
>       values, reinterpret_cast<::arrow::BufferBuilder*>(&values_));
> }
> {code}
> Casts a {{TypedBufferBuilder<T>\*}} to a {{BufferBuilder<T>\*}}. Apparently it works by chance...



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