[Octave-bug-tracker] [bug #52131] lscov fails to run unless all returned variables are used

[Cody Rude]

URL:
  <http://savannah.gnu.org/bugs/?52131>

                 Summary: lscov fails to run unless all returned variables are
used
                 Project: GNU Octave
            Submitted by: extremeadin
            Submitted on: Thu 28 Sep 2017 01:36:01 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: GNU/Linux

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Details:

The function lscov can return 4 results. If all four aren't assigned to a
variable, the function will fail to run.

For example,


A = [1.15, 0; 0.0, -0.95];
B = [5.1,0; 0,4.9];
lscov(A,B)



will fail to run, while the following works


A = [1.15, 0; 0.0, -0.95];
B = [5.1,0; 0,4.9];
[q,w,e,r] = lscov(A,B)



It looks like function only computes some statistics if they will be returned,
but one of those statistics is required further down in the function.

I ran this on Ubuntu 16.04, Octave 4.2.1




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