file operators suffer from The Unicode Bug
What does this mean in this context?

It's not a "bug" per-se, just unspecified behavior that people constantly run into. Perl is designed to run on a wide variety of systems, and there is no one-size-fits-all solution for character encoding, so perl just doesn't solve it. The result is that people on Unix have to explicitly encode and decode the bytes for their file names and environment variables and ARGV and stdin/stdout/stderr, and on Windows things are just kind of broken because the Windows 8-bit APIs use a codepage and don't provide any Unicode workaround (until recently, where they give you a utf-8 codepage that behaves like Unix, but you have to configure that in the manifest of the .exe file and only works on recent-ish Win10 versions and newer)

See Also:

If you need Unicode filesystem or shell support on Windows, I recommend Cygwin's perl until such time as Strawberry releases a perl.exe with the UTF-8 codepage configured.

In reply to Re^3: how are ARGV and filename strings represented? by NERDVANA
in thread how are ARGV and filename strings represented? by almr

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