[BUG] unexpected octave output from code blocks [9.7-pre (release_9.6.7-581-gd38ca5)]

[Paul Stansell <paulstansell@gmail.com>]

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Hello,

The attached org file gives examples of outputs from octave code blocks
that are unexpected and inconsistent.

The attached bug.org file should be opened with

  emacs -Q -l init.el bug.org

The problems only occur when the ":session" header is used.

Paul


Emacs  : GNU Emacs 28.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.37, cairo version 1.16.0)
 of 2023-03-16, modified by Debian
Package: Org mode version 9.7-pre (release_9.6.7-581-gd38ca5 @
/home/ps/.emacs.d_Kubuntu-23.04/org-mode-git/lisp/)

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[-- Attachment #2: init.el --]
[-- Type: text/x-emacs-lisp, Size: 121 bytes --]

(org-babel-do-load-languages
     'org-babel-load-languages
     '((octave . t)))

(setq org-confirm-babel-evaluate nil)

[-- Attachment #3: bug.org --]
[-- Type: text/org, Size: 937 bytes --]

Run with

  /usr/bin/emacs -Q -l init.el bug.org

Then execute the code blocks by using C-c C-c in code block.

Unexpected output (as it includes a blank line ": " and "octave >")
#+begin_src octave :session oct1 :results output
  x = 1;
  x = 1;
  x = 1
#+end_src

#+RESULTS:
: 
: octave> x = 1

Unexpected output (as it does not include ": x = 1")
#+begin_src octave :session oct2 :results output
  x = 1;
  x = 1
  x = 1;
#+end_src

#+RESULTS:

By comparison, these code block give expected results
#+begin_src octave :session oct3 :results output
  x = 1
  x = 1
  x = 1
#+end_src

#+RESULTS:
: x = 1
: x = 1
: x = 1

#+begin_src octave :session oct4 :results output
  x = 1;
  x = 1
  x = 1
#+end_src

#+RESULTS:
: 
: x = 1
: x = 1

Also, if the ":session" headers are removed the all the code blocks give the expected results, for example,
#+begin_src octave :results output
  x = 1;
  x = 1;
  x = 1
#+end_src

#+RESULTS:
: x = 1