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fix: Prevent "index out of range for slice" error in parquet reader #15021

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merged 2 commits into from
Mar 14, 2024
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fix: Prevent "index out of range for slice" error in parquet reader #15021

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223fdf9
fix: Prevent "index out of range for slice" error in parquet reader
mkysylov Mar 12, 2024
893fe50
Remove the extra else if
mkysylov Mar 13, 2024
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4 changes: 3 additions & 1 deletion crates/polars-io/src/parquet/read_impl.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -609,7 +609,9 @@ impl BatchedParquetReader {
return if self.chunks_fifo.is_empty() {
Ok(None)
} else {
Ok(Some(self.chunks_fifo.drain(..n).collect()))
// the range end point must not be greater than the length of the deque
let n_drainable = std::cmp::min(n, self.chunks_fifo.len());
Ok(Some(self.chunks_fifo.drain(..n_drainable).collect()))
};
}

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