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`nix build` does not respond to ctrl-c or ctrl-z #393

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opened 2024-06-13 09:46:49 +00:00 by yorickvp · 8 comments

yorickvp commented

2024-06-13 09:46:49 +00:00

Member

Describe the bug

nix build ignores ctrl-c and ctrl-z

Steps To Reproduce

$ echo 'with import <nixpkgs> {}; (runCommand "unending" {} "sleep 600s")' > long.nix
$ nix build -f long.nix
^C

I have to kill it with kill to make it error: interrupted by the user

Expected behavior

The build exits.

`nix --version` output

nix (Lix, like Nix) 2.90.0pre20240613_1d6fd94

## Describe the bug `nix build` ignores ctrl-c and ctrl-z ## Steps To Reproduce ```console $ echo 'with import <nixpkgs> {}; (runCommand "unending" {} "sleep 600s")' > long.nix $ nix build -f long.nix ^C ``` I have to kill it with `kill` to make it `error: interrupted by the user` ## Expected behavior The build exits. ## `nix --version` output `nix (Lix, like Nix) 2.90.0pre20240613_1d6fd94`

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yorickvp added the

bug

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2024-06-13 09:46:49 +00:00

jade commented

2024-06-13 15:10:02 +00:00

Owner

hmmm wonder if this is a regression because it did work for us at some point recently. will have to look into it

vriska commented

2024-06-13 19:47:02 +00:00

Member

I can't reproduce this:

[leo60228@desktop:~]$ nix shell git+https://git.lix.systems/lix-project/lix.git#nix

[leo60228@desktop:~]$ nix --version
nix (Lix, like Nix) 2.90.0pre20240613_1d6fd94

[leo60228@desktop:~]$ nix build -f long.nix
error: interrupted by the user

I can't reproduce this: ```console [leo60228@desktop:~]$ nix shell git+https://git.lix.systems/lix-project/lix.git#nix [leo60228@desktop:~]$ nix --version nix (Lix, like Nix) 2.90.0pre20240613_1d6fd94 [leo60228@desktop:~]$ nix build -f long.nix error: interrupted by the user ```

szlend commented

2024-06-15 07:47:51 +00:00

This happens to me a lot on Nix 2.18 (darwin) as well, so I don't think it's unique to Lix. More often than not it happens when interrupting nix-direnv right after cding into a project with a dev shell, so I wonder if it's timing related (interrupting nix at a specific phase).

This happens to me a lot on Nix 2.18 (darwin) as well, so I don't think it's unique to Lix. More often than not it happens when interrupting nix-direnv right after `cd`ing into a project with a dev shell, so I wonder if it's timing related (interrupting nix at a specific phase).

jade commented

2024-06-16 01:16:27 +00:00

Owner

If you wind up hitting this problem again, can you please attach a gdb to it (pgrep -af nix on Linux, then sudo gdb -p PID) and get a backtrace with bt?

I am assuming it is deadlocked somewhere, but I don't really have any way of diagnosing that without more information.

If you wind up hitting this problem again, can you please attach a gdb to it (`pgrep -af nix` on Linux, then `sudo gdb -p PID`) and get a backtrace with `bt`? I am assuming it is deadlocked somewhere, but I don't really have any way of diagnosing that without more information.

yorickvp commented

2024-06-19 14:28:45 +00:00

Author

Member

I can no longer reproduce it after rebooting :(.

I think what might have triggered it (though I can no longer reproduce this):

run nix repl
evaluate pkgs
ctrl-c
everything still works as expected
try tab completing something
error: interrupted by the user, nix repl exits
ctrl-c no longer works

I can no longer reproduce it after rebooting :(. I think what might have triggered it (though I can no longer reproduce this): 1. run nix repl 2. evaluate `pkgs` 3. ctrl-c 4. everything still works as expected 5. try tab completing something 6. `error: interrupted by the user`, nix repl exits 7. ctrl-c no longer works

rbt commented

2024-10-05 17:36:18 +00:00

Owner

Upstream issue: https://github.com/NixOS/nix/issues/7245

rbt commented

2024-10-05 17:43:06 +00:00

Owner

Mostly fixed by 86b213e632, but we expect there to still be some cases where Lix is slow or unresponsive to quit following CTRL-C.

Mostly fixed by 86b213e6321540328fb11c3ea99c0b24becc45b0, but we expect there to still be some cases where Lix is slow or unresponsive to quit following CTRL-C.

jade commented

2025-01-20 00:00:30 +00:00

Owner

Probably fixed; if you find more of these feel free to ctrl z them, attach a debugger and file new bugs for the stack traces where that happens.