NetBSD Problem Report #48429

From www@NetBSD.org  Sat Dec  7 09:25:56 2013
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Date: Sat,  7 Dec 2013 09:25:55 +0000 (UTC)
From: yuri@rawbw.com
Reply-To: yuri@rawbw.com
To: gnats-bugs@NetBSD.org
Subject: [libedit] doesn't handle terminal resize events properly
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>Number:         48429
>Category:       lib
>Synopsis:       [libedit] doesn't handle terminal resize events properly
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Dec 07 09:30:00 +0000 2013
>Originator:     Yuri
>Release:        current
>Organization:
n/a
>Environment:
>Description:
When libedit-based program in terminal is resized, currently entered characters should stay in place when possible.
Actual behavior: command prompt is printed at the end of the current line during any screen resize. So that there are several prompts after several resizes.

Problematic place in code: function terminal_change_size calls re_clear_display, and it initializes cursor position in memory, but not on the screen.

Does NetBSD actually use libedit for shell? Does it behave the same way in graphics terminal? I guess yes.
NetBSD is considered to be an upstream for libedit, and it has such major issues.

Also, see the relevant FreeBSD PR: http://www.freebsd.org/cgi/query-pr.cgi?pr=169773
This was the behavior with the previous version of libedit from NetBSD in the same situation.
>How-To-Repeat:

>Fix:

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