[ARROW-10434] [Rust] Debug formatting arrays with lengths greater than 10 and less than 20 produces incorrect values - ASF JIRA

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Debug printing arrays with lengths greater than 10 and less than 20 may duplicate some values in the output.

Example: Array with 10 elements

This example demonstrates printing with the correct output.

println!("{:?}", Int32Array::from(vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9]));

Output:

PrimitiveArray<Int32>
[
  0,
  1,
  2,
  3,
  4,
  5,
  6,
  7,
  8,
  9,
]

Example: Array with 11 elements

This example demonstrates printing with an unexpected output.

println!("{:?}", Int32Array::from(vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]));

Actual Output:

PrimitiveArray<Int32>
[
  0,
  1,
  2,
  3,
  4,
  5,
  6,
  7,
  8,
  9,
  1,
  2,
  3,
  4,
  5,
  6,
  7,
  8,
  9,
  10,
]

Expected Output:

PrimitiveArray<Int32>
[
  0,
  1,
  2,
  3,
  4,
  5,
  6,
  7,
  8,
  9,
  10,
]

links to

GitHub Pull Request #8564

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