On Thu, Nov 18, 2021 at 08:15:15PM +0100, Sven Joachim wrote: > On 2021-11-17 20:21 -0500, Thomas Dickey wrote: > > > On Wed, Nov 17, 2021 at 05:16:52PM +0100, Sven Joachim wrote: > >> Control: reassign -1 ncurses-base 6.3-1 > >> > >> On 2021-11-17 01:11 +0100, Josh Triplett wrote: > >> > >> > I just confirmed that upgrading *only* ncurses-base causes the issue to > >> > appear, and downgrading *only* ncurses-base causes the issue to > >> > disappear. > >> > >> Thanks, that makes sense. For me it is broken in bookworm already, but > >> others have seen it only after upgrading ncurses to 6.3-1. For the > >> reference, the relevant change in ncurses is this: > >> > >> ,---- > >> | 20210925 > >> | + add smglp and smgrp to vt420+lrmm, to provide useful data for the > >> | "tabs" +m option -TD > >> `---- > > > > yes - I implemented left/right margins in xterm in 2012 (patch #279) > > (not quite as long ago as repeat_char). > > > > however, the left/right margin feature was present earlier: > > > > REV:1.730 terminfo.src 2019/05/18 18:58:45 tom > > > > add vt420 left/right margins for xterm-new > > > > +# Left/right margins are supported in xterm since patch #279 (2012/05/10) > > +vt420+lrmm|VT420 left/right margins, > > + mgc=\E[?69l, smglr=\E[?69h\E[%i%p1%d;%p2%ds, > > > >> The neovim developers have pushed a workaround: > >> > >> https://github.com/neovim/neovim/issues/16238 > > > > ...which seems enough to fix their issue > > (they're checking if $XTERM_VERSION is set) > > Aha, this also explains why I experienced the problem even with older > ncurses-base, I had started gnome-terminal from xterm! > > > Since the feature was already present in a different form, > > it seems that neovim is the only widespread user of this. > > Quite likely. > > >> I am not quite sure what to do with this in ncurses. As long as the > >> problem only affects neovim and VTE based terminal emulators I am > >> inclined to ignore it, but if it turns out to be more widespread I could > >> back out the new feature, like I did in #933053. > > > > I don't see that it's necessary. > > Yes, I think a versioned Breaks against neovim should be sufficient, > once a fixed neovim package is available. > > > By the way, #933053 is kind of stale - likely there's no sufficiently > > old systems with broken vte libraries to appease. > > Unfortunately there is at least one unfixed terminal emulator around, > #930037 and the corresponding upstream bug in mosh are still open.
that may take a while (unless someone knowledgeable about terminals helps -- the mosh developers aren't in that category, as I can see from reading its source-code). -- Thomas E. Dickey <dic...@invisible-island.net> https://invisible-island.net ftp://ftp.invisible-island.net
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