That's really interesting, since it certainly persists for me. I expected the whole console window to change output based on the strings, but I get the following output:

tmp.pl

#!perl
use strict;
use warnings;
use charnames ':full';
use Win32::Console;

binmode STDOUT, ':encoding(UTF-8)';

print "\N{INFINITY}\n";
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tmp2.pl

#!perl
use strict;
use warnings;
use charnames ':full';

use Win32;
Win32::SetConsoleOutputCP(65001);
binmode STDOUT, ':encoding(UTF-8)';

print "\N{INFINITY}\n";
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And the console output:

C:>perl q:\tmp.pl
дъз

C:>perl q:\tmp2.pl
∞

C:>perl q:\tmp.pl
∞

C:>chcp
Aktive Codepage: 850.

I'd expect the code page not to persist, and the output of CHCP does indicate that, but the terminal output / interpretation of the programs does indicate that after the first change to UTF-8, the output of subsequent programs is also interpreted as UTF-8 ...

Ah, I think I see what's going on, chcp apparently sets both the input (SetConsoleCP) and output (SetConsoleOutputCP) code pages, but when used to report the current code page, it apparently reports only the input code page, which is why I thought the changes don't persist.

C:\Temp>type test.pl
#!perl
use warnings;
use strict;
use open qw/:std :encoding(UTF-8)/;
use Win32;

print "GetConsoleCP: ", Win32::GetConsoleCP(), "\n";
print "GetConsoleOutputCP: ", Win32::GetConsoleOutputCP(), "\n";
print "chcp: "; system("chcp");

Win32::SetConsoleOutputCP(65001);
Win32::SetConsoleCP(65001) if @ARGV;

C:\Temp>perl test.pl
GetConsoleCP: 850
GetConsoleOutputCP: 850
chcp: Active Codepage: 850.

C:\Temp>perl test.pl x
GetConsoleCP: 850
GetConsoleOutputCP: 65001
chcp: Active Codepage: 850.

C:\Temp>perl test.pl x
GetConsoleCP: 65001
GetConsoleOutputCP: 65001
chcp: Active Codepage: 65001.

C:\Temp>chcp 850
Active Codepage: 850.

C:\Temp>perl test.pl
GetConsoleCP: 850
GetConsoleOutputCP: 850
chcp: Active Codepage: 850.
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