bug: tail_from_end can produces invalid first line

[kalleep]

Component(s)

loki.source.file

What's wrong?

When using tail_from_end we run getLastLinePosition. This one does not take encoding into account. This would be a problem for e.g. UTF-16LE because it encodes newlines as 0A 00 so we would point offset at 00 messing up the first line.

Steps to reproduce

Use loki.source.file on a UTF-16LE encoded file and set tail_from_end = true.

System information

No response

Software version

No response

Configuration

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