>perldoc -f croak
No documentation for perl function `croak' found


>perldoc -f die
    die LIST
            Outside an "eval", ...

>perldoc Carp
...
DESCRIPTION
    The Carp routines are useful in your own modules because they act 
+like
    die() or warn(), but with a message which is more likely to be use
+ful to
    a user of your module. ...
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