[Octave-bug-tracker] [bug #45957] Error "A(I) = X: X must have the same size as I" not very informative

[John W. Eaton]

Follow-up Comment #3, bug #45957 (project octave):

Instead of using a global context variable that must always be set to get
better information in the error message, isn't this a place where throwing an
exception would also solve the problem, and then only incur the overhead when
the exception is found?  That way, indexing code that wants to catch the
exception and also add info about the context could do so, and otherwise, you
would just get a more generic error about a failed indexing operation.

I realize that using an exception would be a pretty big departure from
existing practice for error handling in Octave, but I think it should be
considered.

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