[perl #129025] [RFC] Warn the user if there is any code in a given block after the default or a when { * }

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# New Ticket Created by  Daniel Green 
# Please include the string:  [perl #129025]
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# <URL: https://rt.perl.org/Ticket/Display.html?id=129025 >


This bit me at first when I was changing some conditions around.
E.g., 
given 'a' {
    when Int { say 'Life...' }
    default { say 'this does get run' }
    say 'this does not get run';
}