This is a deliberate exception, see strict:

             There is one exception to this rule:

                 $bar = \&{'foo'};
                 &$bar;

             is allowed so that "goto &$AUTOLOAD" would not break unde
+r
             stricture.
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and running your code through B::Deparse you get (leaving out all the 'feature' stuff):

sub test {
    goto \&{'greet';};
}
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which triggers the exception.

UPDATE: checking your actual code, it is in sub AUTOLOAD, exactly the reason why the exception exists. If something about strict mode confuses, check strict first.