I'm revisiting line endings on both Windows and Linux, and found something that I'm not sure whether it's a bug or if I've overlooked something.

This is in relation to the \R match character in perlrebackslash.

Using this code (note that win.txt is definitely a Windows-ending file):

perl -nE '/(\R)/; say (unpack "H*", $1);' win.txt

[download]

...on many variants of Unix, produces:

0d0a

[download]

...which I expect. However, on Windows, it prints:

0a

[download]

...on literally the exact same file. In fact, I've even set up a VirtualBox shared directory between a Windows VM and a Linux host, and put the file there, as well as testing on a copy. The results are the same.

I've tested perl v5.18 and 5.22 on nix, and Strawberry v5.22 on Windows.

Shouldn't Windows perl also print 0d0a or am I missing something? If this isn't the correct behaviour, could I get one of our Monks who use ActiveState perl test as well?

Update: note that interestingly, I get the same result (0a on win and 0d0a on nix) when I change the regex to /(\s+$)/, so if this is a problem, it isn't only related to \R. Also, on Windows, /\r\n/ does match.

In reply to \R not working as (I'd have) expected on Windows Strawberry perl by stevieb

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