[Octave-bug-tracker] [bug #53871] Increment with += gives error in .m file

[Richard Kirk]

URL:
  <http://savannah.gnu.org/bugs/?53871>

                 Summary: Increment with += gives error in .m file
                 Project: GNU Octave
            Submitted by: richardkirk
            Submitted on: Thu 10 May 2018 01:35:25 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: Richard Kirk
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.0
        Operating System: GNU/Linux

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Details:

I have a 4.4.0 source build on CenoOS 6.5. Also seen by others on ubuntu 16.04
and octave 4.4.0. Does not happen on my previous 3.4.3 build.

I make a local file "dummy.m" with just 3 lines...

# Increment count

count += 1;


I now try to use += to increment 'count'...


octave:1> count = 0;
octave:2> count += 1;
octave:3> count
count =  1


Okay, that worked. Now let's do that by calling dummy.m...


octave:4> dummy
error: count(61,_): but count has size 1x1
error: called from
    dummy at line 3 column 1


If I replace count += 1; with ++count; in dummy.m then it works.


This seemed similar to bug #52363. Doug Stewart tells me it is new, and needs
a separate bug.




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