In perl.git, the branch tonyc/perl_unicode-sysread-syswrite-warnings has been 
created

<http://perl5.git.perl.org/perl.git/commitdiff/b86d850b970b281f25acfc6878334f41d9ee00f8?hp=0000000000000000000000000000000000000000>

        at  b86d850b970b281f25acfc6878334f41d9ee00f8 (commit)

- Log -----------------------------------------------------------------
commit b86d850b970b281f25acfc6878334f41d9ee00f8
Author: Tony Cook <t...@develop-help.com>
Date:   Wed Sep 20 13:44:59 2017 +1000

    prevent pod/builttoc spewing bad UTF-8 errors under PERL_UNICODE

M       pod/buildtoc

commit c6d9cfa9224eba832d6baf2eda29e652353c76ff
Author: Tony Cook <t...@develop-help.com>
Date:   Wed Sep 20 13:27:11 2017 +1000

    avoid sysread()/syswrite() warnings from the default :utf8 from PERL_UNICODE
    
    In a UTF-8 locale, if the PERL_UNICODE environment variable is set,
    perl may add a :utf8 layer.
    
    v5.23.1-197-gfb10a8a deprecated using sysread(), syswrite() etc on such
    handles, which meant that a test run under PERL_UNICODE could produce
    a significant number of deprecation warnings.
    
    Prevent those warnings, typically by binmode(), but in one case by
    disabling the warning.

M       ext/Fcntl/t/fcntl.t
M       ext/Fcntl/t/syslfs.t
M       lib/File/Copy.t
M       t/io/socket.t
M       t/io/through.t
M       t/op/gmagic.t
M       t/op/readline.t
M       t/op/sysio.t
M       t/op/taint.t
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--
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