[Octave-bug-tracker] [bug #61705] Wrong number of columns when removing entry from empty vector

[Vassilis Virvilis]

URL:
  <https://savannah.gnu.org/bugs/?61705>

                 Summary: Wrong number of columns when removing entry from
empty vector
                 Project: GNU Octave
            Submitted by: vasvir
            Submitted on: Sun 19 Dec 2021 05:18:14 PM UTC
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: vasvir
        Originator Email: 
             Open/Closed: Open
                 Release: 6.2.0
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

Hi,

Debian unstable here with octave 6.2.0

Is the following behavior correct? I would expect columns to be zero.

octave:6> vector = []
vector = [](0x0)
octave:7> columns(vector)
ans = 0                <---------------- OK
octave:8> vector = vector(vector != 2)
vector = [](0x1)
octave:9> columns(vector)
ans = 1                <---------------- ????

If there is something to remove everything is ok

octave:10> vector = [2]
vector = 2
octave:11> columns(vector)
ans = 2
octave:12> vector = vector(vector != 2)
vector = [](0x0)
octave:7> columns(vector)
ans = 0                <---------------- OK

This seems inconsistent and I thought it would be best to report it. I tried
to search if a bug like this has been reported but I didn't find anything.

Hope that helps.

   Vassilis





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