dit: render issues (ncurses)

[davidak]

Issue description

I noticed that the output get's corrupted when i used PAGE-UP und PAGE-DOWN to navigate through files. Then sometimes characters stay on the display where other should be...

https://asciinema.org/a/V0gEYXLSzOQuJ05PtFicGPCAk

visible at 0:32 and 3:56.

@matthiasbeyer is that similar to #29355?

here is my upstream bugreport: hishamhm/dit#30

the maintainer asks:

I've had htop users in the past who had similar weird problems when their libncurses version did not match the version of their ncurses headers. Do you happen to have multiple ncurses versions installed?

i think with nix, only the specified dependencies should be visible to the application, right?

for htop, we don't have any special fixes. https://github.com/NixOS/nixpkgs/blob/release-18.03/pkgs/tools/system/htop/default.nix

Steps to reproduce

1. open text file in dit
2. scroll und and down

Technical details

• system: "x86_64-linux"
• host os: Linux 4.14.39, NixOS, 18.03.132275.2352d46904d (Impala)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.0.1
• channels(davidak): ""
• channels(root): "nixos-18.03.132275.2352d46904d, nixos-hardware, unstable-18.09pre133640.ea145b68a01"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs

[matthiasbeyer]

This could be the same as in #29355 - but I am not sure. I'd suggest to try to build dit with another ncurses version compiled in and reconfirm the issue...

[davidak]

@matthiasbeyer no difference.

I'm using NixOS 18.03, which has ncurses-6.0-20171125 and install dit from master, what has ncurses-6.1.

So could it be possible that the "libncurses version did not match the version of the ncurses headers." because dit uses the system version instead of the one specified as dependency?

[matthiasbeyer]

So could it be possible that the "libncurses version did not match the version of the ncurses headers." because dit uses the system version instead of the one specified as dependency?

No. Nix is there to prevent exactly this. I don't know how to go on, sorry. And I am leaving for a sabatical tomorrow, so I guess someone else has to help you. Sorry!

[davidak]

@matthiasbeyer no problem. have a great time!

[vcunat]

Some other ncurses stuff is broken for me but works inside plain xterm.

[c0bw3b]

@davidak still an issue on 18.09 with newer ncurses? i.e. 6.1

[davidak]

@c0bw3b i was not able to reproduce it in a quick test. Thanks for the reminder.

I use micro now.

---

• system: "x86_64-linux"
• host os: Linux 4.14.97, NixOS, 18.09.2132.109a28ab954 (Jellyfish)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.1.3
• channels(root): "nixos-18.09.2132.109a28ab954, nixos-hardware, nixos-unstable-19.03pre168781.929cc78363e"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos