[Rd] Differences in printing UTF-8 strings to stdout vs. stderr under Windows

[Richard Cotton]

It seems that under Windows, some UTF-8 strings that print OK to
stdout do not print correctly to stderr.  To reproduce:

x <- "\ub124"
cat(x, file = stdout())
## 네
cat(x, file = stderr())
## <U+B124>

Original motivating problem here:
https://stackoverflow.com/questions/32696241/how-to-display-a-message-warning-error-with-unicode-characters-under-windows

How does printing to stderr differ from printing to stdout?

And more importantly, is there any way I can ensure correct printing
of Unicode characters when I need to write to stderr (when throwing
errors or warnings)?

-- 
Regards,
Richie

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