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daipom merged 1 commit into from
Jun 10, 2025
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in_tail: add description of bug in encoding option #585

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8 changes: 8 additions & 0 deletions input/tail.md
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Expand Up @@ -231,6 +231,14 @@ You can get the list of supported encodings with this command:
$ ruby -e 'p Encoding.name_list.sort'
```

{% hint style='danger' %}
Caution: From v0.14.12 to v1.18.x, there was a bug.

* You need to specify both `encoding` and `from_encoding`.
* If you specify only `encoding`, `String#encode` will be executed unintentionally. **It can break the data.**
* To change only the encoding info as metadata, without transforming the string data itself (`String#force_encoding`), you need to specify the same encoding for both `encoding` and `from_encoding`.
{% endhint %}

### `read_lines_limit`

| type | default | version |
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