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The ‘"port"’ algorithm of ‘nls()’ could give spurious errors. (Reported by Radford Neal.)
Reference classes that inherited from reference classes in another package could invalidate methods of the inherited class. Fixing this requires adding the ability for methods to be “external”, with the object supplied explicitly as the first argument, named ‘.self’. See "Inter-Package Superclasses" in the documentation.
‘readBin()’ could fail on the SPARC architecture due to alignment issues. (Reported by Radford Neal.)