which had been created based on an existing S3

The check for consistent ordering of superclasses was not

ignoring all conditional relations (the symptom was usually

Trying to assign into a raw vector with an index vector

s could cause a segfault.  Reported by Hervé

filename argument was missing.  Reported by Martin Morgan.

(and functions that use it, including argument

completion in the console) did not handle special built-in

functions.  Reported by Romain Francois.

could segfault when called on character data under certain (rare)

circumstances involving marked non-native encodings.

appending to it (as documented and intended).

Unserializing a pre-2.8 workspace containing pure ASCII

character objects with a Latin-1 or UTF-8 encoding would corrupt