[perl #125441] Less than awesome diagnostic in enum/class name collision

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# New Ticket Created by  Jonathan Stowe 
# Please include the string:  [perl #125441]
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The following example:

  enum Error ( Metadata => -20); class Metadata { }

gives rise to:

===SORRY!===
Cannot find method 'is_composed'

Without any mention of in what or a possible reason why.  In a larger enum I 
had to progressively comment bits out until I saw the problem.

Not a biggy though.