[Octave-bug-tracker] [bug #55347] PVS studio static analysis report

[John W. Eaton]

Follow-up Comment #38, bug #55347 (project octave):

All the reports about idx-vector.h appear to be about the same thing.

The idx_vector functions index, assign, fill, loop, and bloop can't be virtual
because they are templates.  So they use a switch statement to dispatch to the
various types of idx_vector objects that we have and perform a dynamic_cast on
the rep pointer.  If we somehow got the type wrong the dynamic_cast would fail
and return nullptr.  I'm not sure what the best fix is here.  Use assert to
check that the pointer is valid?

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