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Antoine Pitrou commented on ARROW-2744: --------------------------------------- The gdb backtrace: {code} #0 0x00007f09b40fa770 in arrow::Buffer::data (this=0x0) at ../src/arrow/buffer.h:119 #1 0x00007f09a8685155 in parquet::arrow::(anonymous namespace)::ArrowColumnWriter::TypedWriteBatch<parquet::DataType<(parquet::Type::type)1>, arrow::Int32Type> ( this=0x7ffd577fc660, array=..., num_levels=2, def_levels=0x18d2d40, rep_levels=0x1730f40) at /home/antoine/parquet-cpp/src/parquet/arrow/writer.cc:415 #2 0x00007f09a8680a37 in parquet::arrow::(anonymous namespace)::ArrowColumnWriter::Write (this=0x7ffd577fc660, data=...) at /home/antoine/parquet-cpp/src/parquet/arrow/writer.cc:895 #3 0x00007f09a867d6b8 in parquet::arrow::(anonymous namespace)::ArrowColumnWriter::Write (this=0x7ffd577fc660, data=..., offset=0, size=2) at /home/antoine/parquet-cpp/src/parquet/arrow/writer.cc:341 #4 0x00007f09a868adb9 in parquet::arrow::FileWriter::Impl::WriteColumnChunk (this=0x1ad7830, data=..., offset=0, size=2) at /home/antoine/parquet-cpp/src/parquet/arrow/writer.cc:995 #5 0x00007f09a868114d in parquet::arrow::FileWriter::WriteColumnChunk (this=0x1c1b0d0, data=..., offset=0, size=2) at /home/antoine/parquet-cpp/src/parquet/arrow/writer.cc:1025 #6 0x00007f09a8681a85 in parquet::arrow::FileWriter::WriteTable (this=0x1c1b0d0, table=..., chunk_size=2) at /home/antoine/parquet-cpp/src/parquet/arrow/writer.cc:1100 [...] {code} > [Python] Writing to parquet crashes when writing a ListArray of empty lists > ---------------------------------------------------------------------------- > > Key: ARROW-2744 > URL: https://issues.apache.org/jira/browse/ARROW-2744 > Project: Apache Arrow > Issue Type: Bug > Components: Python > Affects Versions: 0.9.0 > Environment: Python Version: 3.6.3 (Anaconda) > OS: OSX and Linux > Reporter: Anton Daitche > Assignee: Antoine Pitrou > Priority: Major > Fix For: 0.10.0 > > > When writing a ListArray which contains only empty lists to Parquet, Pyarrow > crashes. Here is a minimal code snippet which reproduces the crash: > {code:java} > import pyarrow as pa > from pyarrow import parquet as pq > array = pa.array([[]], type=pa.list_(pa.int32())) > table = pa.Table.from_arrays([array], ["A"]) > pq.write_table(table, "tmp.parq"){code} > When the ListArray has at least one non-empty list, the issue disappears. > -- This message was sent by Atlassian JIRA (v7.6.3#76005)