[Octave-bug-tracker] [bug #34478] argn is undefined inside subsref

[Mike Miller]

Follow-up Comment #4, bug #34478 (project octave):

Just hit this error and found this open bug report. This is due to this chunk
of code:
http://hg.savannah.gnu.org/hgweb/octave/file/829e0aafebdc/libinterp/octave-value/ov-class.cc#l437

Does anyone know what Matlab compatibility this is attempting to deal with?
Blame points me to these two changes

http://hg.savannah.gnu.org/hgweb/octave/rev/a76f391a3d02
http://hg.savannah.gnu.org/hgweb/octave/rev/318e0cdd31bd

So it's the way that the @foo/subsref.m function is called by octave_class
that is to blame, but I don't understand what this is meant to be doing to
attempt to fix it.

It looks like it's setting up a heuristic for what kinds of indexing could
lead to more return values than the caller actually requested, maybe? Is this
even needed now?

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