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[Octave-bug-tracker] [bug #51374] hidden axis causes warning by print()

From: Marshall
Subject: [Octave-bug-tracker] [bug #51374] hidden axis causes warning by print()
Date: Mon, 3 Jul 2017 13:47:08 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0


                 Summary: hidden axis causes warning by print()
                 Project: GNU Octave
            Submitted by: marsian
            Submitted on: Mon 03 Jul 2017 05:47:07 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: Marsian
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: Microsoft Windows



I get the warning "gl2ps_renderer::draw_axes: empty feedback buffer and/or
nothing else to print" when I run the following: 


I trace the warning to drawnow (gl2ps_device{n}, ['|' pipeline{n}]); in

The warning is because of the hidden axis. If it is visible, there is no
warning. The work around is to delete the legend rather than just hide it. I
would rather there just not be the warning, though I understand the purpose. I
ran into this originally because I was printing a figure that had multiple
sub-plots where I hid several redundant legends.


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