translateLocally: fails to run on x86_64 without AVX-512

[lheckemann]

Nixpkgs version

• Stable (24.11)

Describe the bug

translateLocally crashes on startup with Illegal instruction when run on an intel i7-1370P:

$ translateLocally 
Illegal instruction (core dumped)

gdb says this is on this instruction:

=> 0x00000000004ca853 <+2083>:  vinserti32x4 $0x1,%xmm13,%ymm15,%ymm3

which is from the AVX-512 extension.

The build seems to do autodetection based on the CPU on which the build runs -- from the build log:

-- AVX512 support found

Steps to reproduce

Run translateLocally on an x86_64 CPU without AVX-512.

Note that this may not occur consistently -- I don't know if all of our Hydra builders have AVX-512, and if some don't we might end up with working binaries depending on where the build was scheduled. I was able to reproduce this on:

• /nix/store/x1ip8qrs57jckjnqy6nsd5znwdkmzfnr-translatelocally-0-unstable-2024-05-12 (from nixpkgs 24.11 commit f668777)
• /nix/store/d16zqbm3wv42ii4x9g209vqbzfr96fs7-translatelocally-0-unstable-2024-05-12 (from nixpkgs unstable 799ba5b)

Expected behaviour

No crash

Screenshots

No response

Relevant log output

Additional context

No response

System metadata

• system: "x86_64-linux"
• host os: Linux 6.6.74, NixOS, 24.11 (Vicuna), 24.11-20250201-f668777
• multi-user?: yes
• sandbox: yes
• version: nix-env (Lix, like Nix) 2.93.0-dev-pre20250201-a513806 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/linus/.config/nix/nix.conf:/etc/xdg/nix/nix.conf:/home/linus/.local/share/flatpak/exports/etc/xdg/nix/nix.conf:/var/lib/flatpak/exports/etc/xdg/nix/nix.conf:/home/linus/.nix-profile/etc/xdg/nix/nix.conf:/nix/profile/etc/xdg/nix/nix.conf:/home/linus/.local/state/nix/profile/etc/xdg/nix/nix.conf:/etc/profiles/per-user/linus/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/63lli5digaa2s45i7q2vz19vp2yyn87j-lix-2.93.0-dev-pre20250201-a513806/share
• nixpkgs: /var/lib/nixpkgs

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@pacien

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[mweinelt]

I don't know if all of our Hydra builders have AVX-512

We generally build x86_64-linux on two 4th gen EPYC machines, so they should always have AVX512.