kern/169603: Possible r237738 libedit regression resizing windows in terminal programs

[David Shao]

>Number:         169603
>Category:       kern
>Synopsis:       Possible r237738 libedit regression resizing windows in terminal programs
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 02 14:20:07 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     David Shao
>Release:        FreeBSD 9.0-STABLE amd64
>Organization:
>Environment:
FreeBSD randomfbsd 9.0-STABLE FreeBSD 9.0-STABLE #0 r237980: Mon Jul  2 04:30:31 PDT 2012     root at randomfbsd:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
Some update between r237683 and r237740 has caused a regression with xfce4's Terminal program:  An attempt to resize a window by dragging a corner results in the window immediately closing.

I have reproduced this on a Pentium 4 machine with an old ati radeon 9000 era card and on newer machines with radeon 4xxxx cards.  There is one exception I have noted: a Terminal window with the results of
svn log | less
can be resized without closing.

While I have not exactly bisected the problem to r237738, this regression is similar to one I have reported for DragonFly BSD after a bisection to an update to libedit.  The identical symptoms lead me to believe the problem will be manifested beyond xfce4's Terminal and beyond the radeon cards tested.
>How-To-Repeat:
Update FreeBSD 9.0-STABLE to r237740 or later and resize a window of xfce4's Terminal program.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: