[Octave-bug-tracker] [bug #52699] ginput() broken on dev

[John W. Eaton]

Follow-up Comment #6, bug #52699 (project octave):

Matlab allows function parameters and existing variables to be made global,
but there is a warning that the local value may change to match the global
value and that this behavior may go away in some future release.  Who knows
when that might be though.  I mean, it has been documented for many many years
that isstr will go away and that you should use ischar instead, but that
hasn't happened yet.

I would prefer that we disallow making existing variables (including function
parameters) global the same as we do for persistent, but we would probably get
complaints about how that behavior is not compatible with Matlab.

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