shanesveller opened a new pull request, #6385:
URL: https://github.com/apache/arrow-rs/pull/6385
# Which issue does this PR close?
Closes #6384.
# Rationale for this change
The panic observed in #6384 was within `StringViewBuilder::get_value`,
because the `string_tracker` hash table was not reset as part of `finish()`:
https://github.com/apache/arrow-rs/blob/e838e62d197cf0f6f653aa47aa00b5e5fb0b5f11/arrow-array/src/builder/generic_bytes_view_builder.rs#L365-L373
If the builder saw continued use, and `append_value` was called with a
previously-observed value, the hash table would return an index to a
now-emptied buffer after slicing into it here:
https://github.com/apache/arrow-rs/blob/e838e62d197cf0f6f653aa47aa00b5e5fb0b5f11/arrow-array/src/builder/generic_bytes_view_builder.rs#L257-L259
# What changes are included in this PR?
Builders will now clear the `string_tracker` hash-table as part of a revised
`finish` definition.
# Are there any user-facing changes?
Not to my knowledge.
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