bugGNU Octave - Bugs: bug #41925, Qt terminal communication error:...


bug #41925: Qt terminal communication error: select() error 9 Bad file descriptor

Submitted by:  None
Submitted on:  Fri 21 Mar 2014 05:16:42 PM UTC  
Category:  Plotting with gnuplot Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Segfault, Bus Error, etc.
Status:  Need Info Assigned to:  None
Originator Name:  Pieter Kubben Originator Email:  -email is unavailable-
Open/Closed:  Closed Release:  3.8.0
Operating System:  Mac OS

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Mon 02 Feb 2015 05:00:35 AM UTC, comment #3: 

This report is filed against a legacy version of Octave (3.8.0).  Closing report.  It can be re-opened if the upcoming 4.0 version shows the same problem, but there have been many improvements and hopefully this has sbeen fixed.

Rik <rik5>
Project Administrator
Wed 26 Mar 2014 03:38:48 AM UTC, comment #2: 

This error message comes from gnuplot, not from Octave, so that confirms it is related to the gnuplot toolkit under Mac OS. The reference to "Qt terminal" in the error means that GNUTERM is "qt", which is set by Octave when our GUI is running.

This bug report needs some gnuplot on Mac expertise.

Mike Miller <mtmiller>
Project Administrator
Fri 21 Mar 2014 05:24:04 PM UTC, comment #1: 

Hmm, sounds like Gnuplot again. Does Octave
really communicate with the Qt plotting through a pipe?
If so, will it really be more effective than FLTK?

It has not been possible to solve the pipe problems
with Gnuplot.

Michael Godfrey <godfrey>
Project Member
Fri 21 Mar 2014 05:16:42 PM UTC, original submission:  

Try this code:


plot(x, sin(x))

and then close the plot window. It gives an error:

Qt terminal communication error: select() error 9 Bad file descriptor

and when trying to plot again, it says:

warning: broken pipe



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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2015-02-02 rik5 Open/ClosedOpen => Closed
    2014-03-26 mtmiller CategoryPlotting => Plotting with gnuplot
        StatusNone => Need Info

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