bugGNU Octave - Bugs: bug #54937, plotting fails with -W...


bug #54937: plotting fails with -W (--no-window-system)

Submitted by:  Colin Macdonald <cbm>
Submitted on:  Fri 02 Nov 2018 05:36:59 AM UTC  
Category:  Plotting with gnuplot Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Regression
Status:  Fixed Assigned to:  Pantxo Diribarne <pantxo>
Originator Name:  Open/Closed:  Closed
Release:  dev Operating System:  GNU/Linux

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Thu 15 Nov 2018 09:59:14 PM UTC, comment #5:

Fixed the spelling of "disallow" and checked in the changeset here: https://hg.savannah.gnu.org/hgweb/octave/rev/32d4ee071348.

Everything works for me now, closing report.

Rik <rik5>
Project Administrator
Thu 15 Nov 2018 08:33:57 PM UTC, comment #4:

In cset ae9d6a491c06 I changed Fdrawnow so that it allows recursion (needed to have callbacks recursively interruptible). The attached patch restores the old behavior when there is no display.

(file #45436)

Pantxo Diribarne <pantxo>
Project MemberIn charge of this item.
Thu 15 Nov 2018 01:11:10 AM UTC, comment #3:

Also adding Pantxo to the CC list.

Rik <rik5>
Project Administrator
Thu 15 Nov 2018 01:10:26 AM UTC, comment #2:

Using hg bisect the changeset that introduced this was

I'm adding Pantxo to this bug report.

My guess is that drawnow() is being called from within the C++ code during the cronstruction of a graphics object. A simpler test example is

Rik <rik5>
Project Administrator
Fri 02 Nov 2018 05:23:25 PM UTC, comment #1:


There is lots of screwy stuff going on here. Even trying to debug it led to strange things where the keyboard() function did not stop the interpreter.

Rik <rik5>
Project Administrator
Fri 02 Nov 2018 05:36:59 AM UTC, original submission:

This is with "hg id: 38a881b8fbec".

If I start with "--no-window-system", Octave used to use some ascii art (via gnuplot I believe).

Now I get:

In Octave 4.4.2, I get:

Probably no one really uses these sorts of things anymore but they are useful in automated testing.

Downstream bug: https://github.com/cbm755/octsympy/issues/915

I have not bisected this yet but it must be somewhat recent (last couple months), maybe

Colin Macdonald <cbm>


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Attach Files:

Attached Files
file #45436:  nodisplay.patch added by pantxo (2KiB - text/x-patch)


Depends on the following items: None found

Items that depend on this one: None found


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    Follow 7 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-11-15 rik5 StatusPatch Submitted => Fixed
        Open/ClosedOpen => Closed
    2018-11-15 pantxo Attached File- => Added nodisplay.patch, #45436
        StatusConfirmed => Patch Submitted
    2018-11-15 rik5 Carbon-Copy- => Added pantxo
    2018-11-15 rik5 Assigned toNone => pantxo
    2018-11-02 rik5 StatusNone => Confirmed

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