[Octave-bug-tracker] [bug #58306] emacs octave mode stopped working (finally)

[Muhali]

URL:
  <https://savannah.gnu.org/bugs/?58306>

                 Summary: emacs octave mode stopped working (finally)
                 Project: GNU Octave
            Submitted by: muhali
            Submitted on: Tue 05 May 2020 08:08:13 AM PDT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: other
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

Since octave-6, emacs octave mode stopped working. Executing this block from
within emacs (M-x run-octave; C-c C-i b)


if 1 == 1
   j = 1 ;
##   j = 2 ;
endif


produces the garbled output

octave> if 1 == 1
>    j = 1 ;
> ##   j = 2 ;
octave> endif
error: parse error:

  syntax error

>>> endif
             ^
octave> 


I am using octave 6.0.1 with emacs 27.0.50. The same used to work with
octave-5.


Addendum: I have seen similar behavior with older (<=5) octave versions
(regions not executed, garbled output,...), albeit not in a deterministic
manner (so I am almost happy that it is finally reproducible). I have reported
this as an emacs bug before, without much response, and I am aware that this
report may as well be regarded as emacs- and not octave-related. However, by
falling exactly between the emacs and octave cracks, this issue is haunting me
for at least 5 years now and for me is *the most annoying of all*.




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