Deeply nested struct type panics on reading parquet statistics

[ritchie46]

This is a continuation of pola-rs/polars#3942. The reading of the file is successful, but the statistics architecture lags behind.

MWE

use std::fs::File;
use polars::export::arrow;
use arrow::error::Error;
use arrow::io::parquet::read;

fn main() -> Result<(), Error> {
    let file_path = "/home/ritchie46/Downloads/part-00003-a422a23f-e65a-4cab-9bd0-6e877a8f7337-c000.snappy.parquet";
    let mut reader = File::open(file_path)?;

    let metadata = read::read_metadata(&mut reader)?;
    let schema = read::infer_schema(&metadata)?;
    let statistics = read::statistics::deserialize(&schema.fields[9], &metadata.row_groups)?;
    Ok(())
}

Backtrace

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: OutOfSpec("The children must have an equal number of values.\n                         However, the values at index 1 have a length of 1, which is different from values at index 0, 2.")', /home/ritchie46/.cargo/git/checkouts/arrow2-8a2ad61d97265680/0b345ae/src/array/struct_/mod.rs:120:52
stack backtrace:
   0: rust_begin_unwind
             at /rustc/93ffde6f04d3d24327a4e17a2a2bf4f63c246235/library/std/src/panicking.rs:584:5
   1: core::panicking::panic_fmt
             at /rustc/93ffde6f04d3d24327a4e17a2a2bf4f63c246235/library/core/src/panicking.rs:142:14
   2: core::result::unwrap_failed
             at /rustc/93ffde6f04d3d24327a4e17a2a2bf4f63c246235/library/core/src/result.rs:1814:5
   3: core::result::Result<T,E>::unwrap
             at /rustc/93ffde6f04d3d24327a4e17a2a2bf4f63c246235/library/core/src/result.rs:1107:23
   4: arrow2::array::struct_::StructArray::new
             at /home/ritchie46/.cargo/git/checkouts/arrow2-8a2ad61d97265680/0b345ae/src/array/struct_/mod.rs:120:9
   5: <arrow2::io::parquet::read::statistics::struct_::DynMutableStructArray as arrow2::array::MutableArray>::as_box
             at /home/ritchie46/.cargo/git/checkouts/arrow2-8a2ad61d97265680/0b345ae/src/io/parquet/read/statistics/struct_.rs:43:18
   6: <arrow2::io::parquet::read::statistics::list::DynMutableListArray as arrow2::array::MutableArray>::as_box
             at /home/ritchie46/.cargo/git/checkouts/arrow2-8a2ad61d97265680/0b345ae/src/io/parquet/read/statistics/list.rs:39:21
   7: <arrow2::io::parquet::read::statistics::Statistics as core::convert::From<arrow2::io::parquet::read::statistics::MutableStatistics>>::from
             at /home/ritchie46/.cargo/git/checkouts/arrow2-8a2ad61d97265680/0b345ae/src/io/parquet/read/statistics/mod.rs:80:13
   8: <T as core::convert::Into<U>>::into
             at /rustc/93ffde6f04d3d24327a4e17a2a2bf4f63c246235/library/core/src/convert/mod.rs:550:9
   9: arrow2::io::parquet::read::statistics::deserialize
             at /home/ritchie46/.cargo/git/checkouts/arrow2-8a2ad61d97265680/0b345ae/src/io/parquet/read/statistics/mod.rs:554:8
  10: memcheck::main
             at ./src/main.rs:12:22
  11: core::ops::function::FnOnce::call_once
             at /rustc/93ffde6f04d3d24327a4e17a2a2bf4f63c246235/library/core/src/ops/function.rs:248:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

The file is available from the link mentioned here; pola-rs/polars#3942 (comment)