On Tue, 16 Nov 2021 23:00:08 +0100 Sven Joachim <svenj...@gmx.de> wrote:
> On 2021-11-16 21:53 +0100, Josh Triplett wrote:
>
> > On Tue, Nov 16, 2021 at 08:02:53PM +0100, Sven Joachim wrote:
> >> On 2021-11-16 16:30 +0100, Josh Triplett wrote:
> >>
> >> > Package: libncursesw6
> >> > Version: 6.3-1
> >> > Severity: important
> >> > X-Debbugs-Cc: j...@joshtriplett.org
> >> >
> >> > "important" because this makes neovim nearly unusable; not RC because
> >> > I've only observed it with one combination of terminal and program. I
> >> > personally think that might still be enough to make it RC until
> >> > root-caused to determine if it's breaking anything else.
> >> >
> >> > Steps to reproduce:
> >> >
> >> > - `nvim -u NONE` (to ignore any .vimrc)
> >> > - :%!seq 1000
> >> > - :vert new
> >> > - :%!seq 1000
> >> > - Hit page-down
> >> > - Observe the other side of the split (as well as the vertical bar
> >> > between the split windows) scrolling off the screen.
> >> >
> >> > Downgrading the ncurses packages to 6.2+20210905-1 makes the problem
> >> > disappear; re-upgrading to 6.3-1 makes it come back.
> >>
> >> This is rather surprising, because neovim does not depend on
> >> libncursesw6, not even on libtinfo6. Did you up-/downgrade
> >> ncurses-{base,term} as well, and what is your $TERM?
> >
> > I downgraded by installing all seven of:
> >
> > libncurses6_6.2%2B20210905-1_amd64.deb
> > libncursesw6_6.2%2B20210905-1_amd64.deb
> > libncurses-dev_6.2%2B20210905-1_amd64.deb
> > libtinfo6_6.2%2B20210905-1_amd64.deb
> > ncurses-base_6.2%2B20210905-1_all.deb
> > ncurses-bin_6.2%2B20210905-1_amd64.deb
> > ncurses-term_6.2%2B20210905-1_all.deb
> >
> > That made the issue disappear. Re-upgrading made the issue re-appear.
>
> Did you also restart gnome-terminal? I don't really see how that could affect
> the issue since nothing in its stack depends on ncurses, but I am
> completely at a loss here.
I just confirmed that upgrading *only* ncurses-base causes the issue to
appear, and downgrading *only* ncurses-base causes the issue to
disappear.
I did not restart gnome-terminal.
strace of `nvim -u NONE` confirms that it opens and reads
/lib/terminfo/x/xterm-256color . neovim depends on both libunibilium4
and libtermkey1, which use terminfo.
