pkg/57054: mcabber: User interface gets destroyed/garbled on screen refresh (CTRL+L)

[adrian%mx.aik.onl@localhost]

>Number:         57054
>Category:       pkg
>Synopsis:       mcabber's user interface destroyed on screen refresh (CTRL+L)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Oct 13 10:40:01 +0000 2022
>Originator:     Adrian Immanuel Kiess
>Release:        NetBSD 9.3
>Organization:
  KIESS.ONL
>Environment:
	
	
System: NetBSD www3.kiess.onl 9.3 NetBSD 9.3 (GENERIC) #0: Thu Aug 4 15:30:37 UTC 2022 mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
  Dear Maintainer,

	a screen fresh caused by the user environment or by hitting the keystroke CTRL+L, to force it manually, will destroy/garble the user interface of mcabber from pkgsrc, running on NetBSD/amd64.

	I suspect it could be happening because of the NetBSD specific port of ncurses on NetBSD from pkgsrc.

	Please could you can have a look to this issue? 

	I am using mcabber inside tmux, running on a ZSH shell, on a NetBSD virtual private machine running at the Internet.

	Because of above bug, I must restart mcabber regularily. I don't see similiar behaviour with console clients like irssi or profanity on NetBSD.

	Thank you very much, for your kind attention.

	Sincerely,

	Adrian Kiess
>How-To-Repeat:
  % mcabber& inside a tmux session and hit the key combination CTRL+L. Best to see, on a transparent terminal. One can set the background color from black to default (transparent background) in mcabber configuration, but the problem persists.
>Fix:
  No fix is known to me. Most probably a bug through the NetBSD specific port of ncurses.

>Unformatted: