http://www.perlmonks.org?node_id=263678


in reply to Ranges in case insensitive regexps in unicode mode


It looks like the behaviour changed (i.e. was fixed) between 5.6 and 5.8: 
    $ perl5.6.0 -Mutf8 -e 'print "b" =~ /[A-C]/i ? "true\n" : "false\n
+"'
    false

    $ perl5.8.0 -Mutf8 -e 'print "b" =~ /[A-C]/i ? "true\n" : "false\n
+"'
    true

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--
John.

In Section Seekers of Perl Wisdom