Ctrl-C when using `--ask` causes invisible terminal cursor

[fxzzi]

I have confirmed that this is a bug related to nnh

• This is a bug, and not an user error or a support request. I understand that my issue will be closed if it is not a bug in NH.
• I have checked the issues tab and confirmed that my issue has not yet been reported. I understand that my issue will be closed if it is a duplicate.

Description

Running any nh related command with --ask, an example being nh os switch --ask, and using Ctrl-C / killing nh in any way at the final prompt, causes the cursor on my terminal emulator (foot) to become invisible.

It can be brought back by running an nh command with --ask again, and choosing y / n at the prompt.

Installation Method

NixOS (nixpkgs, pkgs.nh)

Installation Method (Other)

No response

NH Version

nh 4.1.1

System Information

• system: "x86_64-linux"
• host os: Linux 6.15.8-zen1, NixOhEss, 25.11 (Xantusia), 25.11.20250803.b16813b
• multi-user?: yes
• sandbox: yes
• version: nix-env (Lix, like Nix) 2.93.3 System type: x86_64-linux Additional system types: i686-linux, x86_64-v1-linux, x86_64-v2-linux, x86_64-v3-linux Features: gc, signed-caches System configuration file: /etc/nix/nix.conf User configuration files: /home/faaris/.config/nix/nix.conf:/etc/xdg/nix/nix.conf:/home/faaris/.nix-profile/etc/xdg/nix/nix.conf:/nix/profile/etc/xdg/nix/nix.conf:/home/faaris/.local/state/nix/profile/etc/xdg/nix/nix.conf:/etc/profiles/per-user/faaris/etc/xdg/nix/nix.conf:/nix/var/nix/profiles/default/etc/xdg/nix/nix.conf:/run/current-system/sw/etc/xdg/nix/nix.conf Store directory: /nix/store State directory: /nix/var/nix Data directory: /nix/store/56yfzcswfrd234zq4mz0qvrn2iks1frb-lix-2.93.3/share
• nixpkgs: /nix/store/km38bigmcfqwvl5531m00gbnw3qnk0s7-source

[NotAShelf]

Could you see if this occurs with other terminal emulators as well? I have had issues with my terminnal cursor simply disappearing on recent Foot versions, regardless of nh's --ask flag.

[fxzzi]

it also occurs on kitty and alacritty. I think nh is probably hiding the cursor on purpose on that prompt, and then not restoring it if forcefully closed.

[faukah]

Cannot reproduce, neither on nh from nixpkgs nor on master.

Does this happen in every shell / could you try it in Bash if you haven't yet? Maybe this is related to a funny shell setup or something..

[fxzzi]

was using zsh, also occurs on bash:

(i have no special configuration on bash)

[NotAShelf]

I have managed to reproduce this, actually. Though I am not sure if this is something NH can solve? The prompt is handled by dialoguer, and the bug is likely on that end if not the terminal.

[NotAShelf]

@fxzzi could you please see if #382 fixes this? I can no longer reproduce it after the migration.

[NotAShelf]

Closed by #382