[bug #68426] hgsave/hgload should ignore unrestorable callbacks

"Dmitri A. Sergatskov" <[email protected]> Sat, 6 Jun 2026 21:17:09 -0400 (EDT)

Newsgroups	gmane.comp.gnu.octave.bugs
Message-ID	<[email protected]>

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URL:
  <https://savannah.gnu.org/bugs/?68426>

                 Summary: hgsave/hgload should ignore unrestorable callbacks
                   Group: GNU Octave
               Submitter: dasergatskov
               Submitted: Sun 07 Jun 2026 01:17:03 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error or Warning
                  Status: None
             Assigned to: None
         Originator Name:
        Originator Email:
             Open/Closed: Open
         Discussion Lock: Unlocked
                 Release: dev
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Sun 07 Jun 2026 01:17:03 AM UTC By: Dmitri A. Sergatskov <dasergatskov>
Currently `hgsave` saves unrestorable private graphics functions which become
invalid callbacks after hgload.
E.g:

octave:1> bar(1:3)
octave:2> fname = [tempname() ".ofig"];
octave:3> hgsave (gcf, fname);  close all;
octave:4> h = hgload (fname);   unlink (fname);
octave:5> close all
error: invalid function handle, unable to find function for
@rm_axes_listeners
error: called from
    delete at line 73 column 5
    closereq at line 40 column 5
    close at line 121 column 5


Dmitri.
-- 








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