Bug#991686: gnuplot: invalid utf8 input via terminal

[Łukasz Stelmach]

Package: gnuplot
Version: 5.2.6+dfsg1-1+deb10u1
Severity: normal

Dear Maintainer,

1. Start gnuplot under xterm.
2. Type or paste the command:

   print "zażółć gęślą jaźń"

3. Gnuplot improperly displays the command typed as:

   print "zażóÅÄ gÄÅlÄ jaźÅ"

   The string printed by the command is also invalid.

4. Gnuplot should display edited command and print the string as
   presented in point 2.

Possible fix:

Don't use BSD readline library which doesn't support UTF-8 as explained
in the help message of gnuplot's configure script:

  --with-readline=bsd      use the NetBSD editline library (NB: does not handle UTF-8!)

-- System Information:
Debian Release: 10.10
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-17-amd64 (SMP w/4 CPU cores)
Locale: LANG=pl_PL.UTF-8, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8), LANGUAGE=pl_PL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gnuplot depends on:
ii  gnuplot-qt [gnuplot-x11]  5.2.6+dfsg1-1+deb10u1

gnuplot recommends no packages.

Versions of packages gnuplot suggests:
ii  gnuplot-doc  5.2.6+dfsg1-1+deb10u1

-- no debconf information

-- 
Miłego dnia,
Łukasz Stelmach