bugGNU Octave - Bugs: bug #37750, segfault when parenting gca to...

 
 

bug #37750: segfault when parenting gca to hggroup

Submitter:  Muhali <muhali>
Submitted:  Thu 15 Nov 2012 03:45:14 PM UTC
 
Category:  Plotting Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Segfault, Bus Error, etc.
Status:  Fixed Assigned to:  jordigh
Originator Name:  Open/Closed:  * Closed
Release:  * dev Operating System:  * GNU/Linux
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Sat 12 Oct 2013 04:25:25 AM UTC, comment #6: 

I checked in a more complicated fix for the remaining issue (http://hg.savannah.gnu.org/hgweb/octave/rev/cd5a6008ae72).  Closing report.

Rik <rik5>
Project Administrator
Fri 11 Oct 2013 12:49:41 AM UTC, comment #5: 

I checked in a partial fix (http://hg.savannah.gnu.org/hgweb/octave/rev/82b1778798d3) which avoids setting the parent object to be the object itself.  Thus,

set(gca, "parent", gca);

no longer causes a segfault.

However, there is still a problem with the hggroup example.  I've re-titled the bug to reflect that.

Rik <rik5>
Project Administrator
Thu 15 Nov 2012 04:35:39 PM UTC, comment #4: 

It doesn't seem to be recursive, but it is. It's the same problem.

Jordi Gutiérrez Hermoso <jordigh>
Project Administrator
Thu 15 Nov 2012 04:32:11 PM UTC, comment #3: 

note that this also creates a segfault:

hg = hggroup;
set(gca, "parent", hg);

and it does not seem to be recursive.

Muhali <muhali>
Thu 15 Nov 2012 04:26:05 PM UTC, comment #2: 

Hah! Looks like this makes base_properties::mark_modified call itself recursively forever.

The issue with the gcf calling form seems unrelated. Please file a separate report for that.

Jordi Gutiérrez Hermoso <jordigh>
Project Administrator
Thu 15 Nov 2012 04:22:48 PM UTC, comment #1: 

Thanks, I like killing segfaults. I'll investigate this problem.

Jordi Gutiérrez Hermoso <jordigh>
Project Administrator
Thu 15 Nov 2012 03:45:14 PM UTC, original submission:  

The following segfaults octave.

set(gca, "parent", gca);

This may not be the wisest thing to do, but interestingly, when for some figure I repeatedly do

set(gca, "parent", gcf);

the figure keeps changing, which is not what I would expect.

Muhali <muhali>

 

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    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2013-10-12 rik5 StatusConfirmed Fixed
        Open/ClosedOpen Closed
    2013-10-11 rik5 Summarysegfault with \'set(gca, "parent", gca)\' segfault when parenting gca to hggroup
    2012-12-15 bpabbott Carbon-Copy- Added -email is unavailable-
    2012-11-15 jordigh StatusNone Confirmed
        Assigned toNone jordigh

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