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Aubrey Jaffer <agj@xxxxxxxxxxxx> writes: > I think that an implementation should be allowed to signal an error > under some conditions where an error object is encountered. Mandating > readable written representations for error objects prevents an > implementation from signaling such errors. I think this might be confused. Surely the mandating of a representation would mean "if you print something (rather than signalling an error) you should print it such-and-such a way." Thomas