[bug #26085] infinite recursion in nested structure

[Thorsten Meyer]

URL:
  <http://savannah.gnu.org/bugs/?26085>

                 Summary: infinite recursion in nested structure
                 Project: GNU Octave
            Submitted by: tmeyier
            Submitted on: Sat 04 Apr 2009 01:56:15 PM UTC
                Category: Interpreter
                Severity: 4 - Important
              Item Group: Crash
                  Status: None
             Assigned to: highegg
         Originator Name: Thorsten Meyer
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

In todays tip (4218f9515258) I have found a bug reproducible by the example
below. Apparently, the lazy copying scheme produces an infinite recursion in
the assignment in line 12.

Also, I try the savannah bug tracker with this. I have added the maintainers
mailing list in the mail cc field. Is that the right way to do it as long as
we haven't switched to the bug tracker completely?

regards

Thorsten

-------------------------------------------

octave:6> clear
octave:7> a.a=1;
octave:8> a.b=2;
octave:9> a.c=a;
octave:10> a
a =
{
  a =  1
  b =  2
  c =
  {
    a =  1
    b =  2
  }

}

octave:11> a.c.b=a;
octave:12> a
a =
{
  a =  1
  b =  2
  c =
  {
    a =  1
    b =
    {
      a =  1
      b =  2
      c =
      {
        a =  1
        b =
        {
          a =  1
          b =  2
          c =
          {
            a =  1
            b =
            {
              a =  1
              b =  2
              c =
              {
                a =  1
                b =
                {
                  a =  1
                  b =  2
                  c =
                  {
                    a =  1
                    b =
                    {
                      1x1 struct array containing the fields:

                        a: 1x1 scalar
                        b: 1x1 scalar
                        c: 1x1 struct
                    }

                  }

                }

              }

            }

octave:13> whos
Segmentation fault





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