If one puts it this way:

sage: 0^0
1
sage: RDF(0)^RDF(0) #this one is the most dubious
1.0
sage: SR(0^0)
1
sage: SR(0)^SR(0)
RuntimeError: power::eval(): pow(0,0) is undefined

I think it's pretty clear that the error should go away unless there
are very convincing technical reasons.

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