Unable to change scilab prompt in GUI editor

[SYN-2009]

Scilab does not work properly.

When you try to type in the program editor
a=input ('a=');
writes that there is a mistake
on line 1 of the executable string value
on line 50 of the input function ( /usr/share/scilab/modules/io/macros/input.sci line 63 )
on line 1 of the executable file /home/usr-2/Mat/uravn.sce

mprintf: Invalid input parameter type # 1: string expected.

Additionally, the program freezes and sometimes closes

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: scilab 6.0.1-7ubuntu1~18.04
ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18
Uname: Linux 4.15.0-47-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 20 13:18:57 2019
InstallationDate: Installed on 2018-05-06 (349 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: scilab
UpgradeStatus: No upgrade log present (probably fresh install)

[SYN-2009 (ra9uek)]

I was informed that the problem is only with scilab 6.0.1. You need to upgrade to version 6.0.2. Please put in repository version 6.0.2

[Matthias Klose (doko)]

please check that this is fixed in the 19.04 disco release.

[SYN-2009 (ra9uek)]

Unfortunately, I can't be sure, because I use Ubuntu 18.04 and I don't want to change the system, especially not the LTS version.

[Tiago Stürmer Daitx (tdaitx)]

Problem still happens in scilab 6.0.2 on Eoan.

[Tiago Stürmer Daitx (tdaitx)]

The code for input(message) (see /usr/share/scilab/modules/io/macros/input.sci) calls prompt(message) and then mscanf(format_string). The prompt() function is meant to modify the prompt for the next user interaction, but for some reason calling this function does nothing at all.

As calls to prompt(new_prompt) do nothing the default prompt ('-->') is shown instead, but any content typed by the user is used for the previous input(message) call. This is a bit misleading for the user, as it seems/feels like nothing happened after the input(message) call, but scilab is in fact expecting the response for the input(message).

I found http://bugzilla.scilab.org/show_bug.cgi?id=14998 reported stating that input(message) should instead be calling mprintf() instead of prompt().

[Sylvestre Ledru (sylvestre)]

This patch https://salsa.debian.org/science-team/scilab/commit/af933fa83ed0cc731b54a8369888b7b165775798
fixes the issue
should be trivial to cherry-pick this change

[Tiago Stürmer Daitx (tdaitx)]

Please notice that this only affects the GUI Editor (aka scilab), the scilab command line tool (ie. scilab-cli) works as expected.

[Tiago Stürmer Daitx (tdaitx)]

On Wed, Jun 12, 2019 at 5:40 PM Sylvestre Ledru
<email address hidden> wrote:
>
> This patch https://salsa.debian.org/science-team/scilab/commit/af933fa83ed0cc731b54a8369888b7b165775798
> fixes the issue
> should be trivial to cherry-pick this change

That fix is being tracked in bug 1825037 and it does not fix the
prompt issue in the GUI. With that fix applied I can still see the GUI
prompt issue in both scilab 6.0.1 and 6.0.2.