bugGNU Octave - Bugs: bug #50283, `help sym` from symbolic package...


bug #50283: `help sym` from symbolic package results in corrupt "less" output

Submitted by:  None
Submitted on:  Sun 12 Feb 2017 03:25:03 AM UTC  
Category:  GUI Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Regression
Status:  Need Info Assigned to:  None
Originator Name:  Mingye Wang Originator Email:  -email is unavailable-
Open/Closed:  Open Release:  4.2.0
Operating System:  Microsoft Windows

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Fri 17 Feb 2017 01:09:09 AM UTC, comment #4:

No. Patching the module gets rid of the perl warning, but not the "less" problems discussed in this bug.

Mingye Wang <arthur2e5>
Fri 17 Feb 2017 12:52:15 AM UTC, comment #3:

Is this fixed by patching the Perl utf8_heavy module, according to the discussion on bug #49839 (specifically file #39225 in that bug report) and on https://github.com/cbm755/octsympy/issues/610?

Mike Miller <mtmiller>
Project Administrator
Sun 12 Feb 2017 03:47:48 AM UTC, comment #2:

Additional tests: "help help" and "help imtransform" looks fine. "help syms", "help @sym/taylor" are equally broken in 4.2.0 GUI.

Mingye Wang <arthur2e5>
Sun 12 Feb 2017 03:28:57 AM UTC, comment #1:


A few 'f's ahead, some text gets skipped (compare this to the correct comments in sym.m from the package):

(The "symbolic" package is located at https://octave.sourceforge.io/symbolic/.)

Mingye Wang <arthur2e5>
Sun 12 Feb 2017 03:25:03 AM UTC, original submission:

OS: Windows 10, build 15031 (weird one);
Build: Octave 4.2.0, Windows x64, grabbed from ftp.gnu.org
Previous build: Octave 4.0.0, Windows x86, something that installs to C:\Octave\Octave-4.0.0

Steps to reproduce:

  1. Install the symbolic package from octave-forge. Since "pkg install -forge" never works for me, I grabbed the tarball and manually ran "pkg install symbolic-2.5.0.tar.gz".
  2. Load the package by running "pkg load symbolic"
  3. Run "help sym".

Output prior to regression (broken in another way):

Output is paged into multiple less pages. A few navigations forward with "f" shows mojibake typical of decoding UTF-8 characters into certain Windows code pages. (cp1252/cp437 in my case, I guess).

Current more broken output:

Output seems paged into multiple pages, but the navigation prompt is not visible. Only the first few lines are printed, along with a perl warning that also flushed the screen during installation: (Transcripted by hand; less doesn't want me to copy it?)



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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    Fri 17 Feb 2017 12:52:15 AM UTC mtmiller StatusNone => Need Info

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