Parquet list reader not reading correct element lengths

[nevi-me]

Describe the bug

This is https://issues.apache.org/jira/browse/ARROW-13120 moved here, with a bit more details.

The issue is that the list reader does not check repetitions to calculate the correct number of values to read in order to correctly compose a list.

To Reproduce

Given an array:

{"list": [1, 2, 3]}
{"list": [4, 5]}

Reading 2 values should return the 5 child values, but only 1 and 2 are returned.

Expected behavior

List reader should calculate the correct number of child values to read, then return those values instead of slicing between arrays.

Additional context

This bug seems to have existed before the new arrow reader contributed by @yordan-pavlov

[nevi-me]

@mcassels I've opened this issue to track the bug that you identified

[alamb]

@helgikrs has been recently working on some fixes for this type of issue in #1187 #1166 and #1185 . I wonder if someone could check if it is still an issue

[tustvold]

This does not appear to be an issue anymore, possibly closed by #1588 or some prior pr