- generic/nsf.c: For "tolerating" hidden objects, I verified the various occurrences of conitional branching based on the cmd's epoch counter. While most occurrences are not concerned (cmds of nested objects, or simply non-object commands), I identified three relevant spots: a) In NsfProcAliasMethod(), invalidating and rebinding the alias target command (including hidden objects as alias pointers) is based on the epoch counter; b) in MixinSearchProc() the lookup of mixed-in methods is affected; c) using CmdListRemoveEpoched() (as the name says), "deleted" commands are identified by looking at the cmd epoch and sorted out from mixin lists computed for precedence lists. I corrected cases b) and c), with the fixes being covered by accompanying tests; a) turned out to be consistent with alias rebinding behaviour for [rename]. While we could correct a) for hidden cmd awareness, this would have to be done for the likeminded alias + [rename] as well. - generic/nsf.c: Renamed CmdListRemoveEpoched() to CmdListRemoveDeleted() - tests/interp.test: Added tests on b) and c), as well as hiding globally namespaced procs and objects as alias targets (merely for documenting the behaviour).
