[project @ 1999-02-26 12:46:45 by simonm]
Fix stable pointer bug: - the 'keep' flag is now a pointer to the stable name object. - makeStableName always returns an existing stable name object if one exists. - re-use stable name table entries iff the stable name object becomes unreachable (takes into account generational GC now), and the reference count is 0.
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