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[Octave-bug-tracker] [bug #41945] Segfault when subsasgn returns nothing


From: Andreas Weber
Subject: [Octave-bug-tracker] [bug #41945] Segfault when subsasgn returns nothing in user-defined class
Date: Mon, 24 Mar 2014 15:45:49 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20140205 Firefox/24.0 Iceweasel/24.3.0

URL:
  <http://savannah.gnu.org/bugs/?41945>

                 Summary: Segfault when subsasgn returns nothing in
user-defined class
                 Project: GNU Octave
            Submitted by: andy1978
            Submitted on: Mo 24 Mär 2014 15:45:48 GMT
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.8.1
        Operating System: GNU/Linux

    _______________________________________________________

Details:

When playing with user-defined classes I get a segfault when there is no
return from @myclass/subasgn


function r = myclass (a)
  tmp.value = 123;
  r = class (tmp, "myclass");
endfunction

function display(c)
  fprintf("This is myclass with value=%d\n", c.value);
endfunction

function subsasgn (val, idx, rhs)
  val
  idx
  rhs
endfunction

octave:1> x=myclass(3)
This is myclass with value=123
octave:2> x(4)=5
panic: Segmentation fault -- stopping myself...
attempting to save variables to 'octave-workspace'...
save to 'octave-workspace' complete
Speicherzugriffsfehler



I think implementing subsasgn in a user-defined class without return value
(like my example above) doesn't make sense but nevertheless octave shouldn't
segfault.

-- Andy



    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: Mo 24 Mär 2014 15:45:48 GMT  Name: myclass.tar.gz  Size: 355B   By:
andy1978

<http://savannah.gnu.org/bugs/download.php?file_id=31024>

    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?41945>

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