Re: lib/59945: nvi coredump in libcurses

["RVP via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR lib/59945; it has been noted by GNATS.

From: RVP <rvp%SDF.ORG@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: lib/59945: nvi coredump in libcurses
Date: Tue, 17 Feb 2026 07:06:13 +0000 (UTC)

 On Mon, 26 Jan 2026, Simon Burge via gnats wrote:
 
 >        nvi gets a segmentation fault in libcurses when you follow the
 >        steps in "how to repeat" section.  This segfault happens with
 >        screen when the terminal type is "screen".  If you set the
 >        terminal type to "xterm" it works normally.
 >
 
 As an FYI: the difference is due to different code paths[1] being taken. The
 "screen" terminfo entry exports the `am' (automatic margins) capability, but
 no strings for `smam' (turn on auto margins) and `rmam' (turn off auto
 margins)[2] are. (Also in the 5.0.1 official tarball.)
 
 -RVP
 
 [1]: https://github.com/NetBSD/src/blob/trunk/lib/libcurses/refresh.c#L1079
 [2]: https://github.com/NetBSD/src/blob/trunk/share/terminfo/terminfo#L8146