[Octave-bug-tracker] [bug #58748] function doesn't return expected number of arguments

[Markus Mützel]

URL:
  <https://savannah.gnu.org/bugs/?58748>

                 Summary: function doesn't return expected number of arguments
                 Project: GNU Octave
            Submitted by: mmuetzel
            Submitted on: Sat 11 Jul 2020 02:08:25 PM CEST
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: dev
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

Running the following in Octave 7 (hg id 24f43782e04c) results in an error:

>> [status, attr] = fileattrib (P_tmpdir ());

error: if: undefined value used in conditional expression
error: called from
    dos at line 52 column 5
    fileattrib at line 116 column 21


It was still working correctly in a build from last week.

I'm not certain what is happening here. So the bug title might be wrong.
Lines 52ff in "dos" read:

  if (! isunix ())
    [status, text] = system (command);
    if (nargin > 1 || nargout == 0)
      printf ("%s\n", text);
    endif
  endif


Running a script with the following displays "test" and no error message is
shown:

if (! isunix ())
  disp ("test");
endif


This might be related to the recent changes related to function output
arguments. So the stable branch might be affected, too.




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