v1.1.21-baseline crashing with Illegal Instruction (regression from v1.1.20)

Hey, I'm getting an 'Illegal instruction' crash with the latest v1.1.21 baseline build on my older laptop.

Everything was working fine on v1.1.20, but after updating to v1.1.21 it started crashing immediately. It looks like a Bun panic related to missing AVX support, even though I'm using the baseline build which is supposed to support older CPUs.

Here is the panic log:

CPU lacks AVX support. Please consider upgrading to a newer CPU.
panic(main thread): Illegal instruction at address 0x4001FB4
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

My specs:

CPU: Intel Pentium B980 (No AVX support)
OS: Ubuntu 24.04.3 LTS
Kernel: 6.14.0

I've downgraded back to v1.1.20 for now and it's working again, so it definitely seems like a regression in the new version. Any chance this can be looked into for the next update?

This issue might be a duplicate of existing issues. Please check:

unable to run opencode on my local machine #2562: unable to run opencode on my local machine - Reports similar 'Illegal instruction' crash with baseline build on Windows with no AVX support
Opencode docker fails to launch in GitLab CI environment #5191: Opencode docker fails to launch in GitLab CI environment - Baseline build crash with 'Illegal instruction' error in Linux environment
Since opencode 1.0.116 no longer able to run binary as it crashes with bun seg fault #4970: Since opencode 1.0.116 no longer able to run binary as it crashes with bun seg fault - Related baseline build crash issue

All of these appear to be related to the baseline build's CPU compatibility handling. Feel free to ignore if your specific case differs from these issues.

Just to clarify, this isn't a duplicate of those older issues. I've tested this specifically and verified that v1.1.20-baseline works perfectly on this same machine, while v1.1.21-baseline crashes.

This seems to be a new regression in the latest release's baseline build.

I can also confirm this is affecting me since v1.1.21. When reverting to v1.1.20, opencode does not crash on boot.

also been seeing this since v1.1.21, and the address 0x4001FB4 is always the same

Even after downgrading (aur) to 1.1.18 bum crash issue, whether plugins like Pty and oh-my-opencode are configured or not. Edit: executable installed via official installer was still configured in shells, durp. Editing package.json and installing 1.1.20 binary in $HOME/.config/opencode/bin only launches successfully one time. Will report back.

Edit: mv executable, make a shell script to execute the binary with OPENCODE_NO_AUTO_UPDATE=1 ./opencode-binary
or just remember the var, or opencode.json(c) "autoupdate": true,

Same thing, only on v1.1.21 when running on my older (i7 first-gen) machine.

Same problem. Crash followed by random chars in the terminal.

Bun bug :/

We will just downgrade bun, that should fix it in next release

Should be fixed by: 5a8a0f6

Will release later today

Navigation Menu

Repository navigation

v1.1.21-baseline crashing with Illegal Instruction (regression from v1.1.20) #8611

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

v1.1.21-baseline crashing with Illegal Instruction (regression from v1.1.20) #8611

Description

Activity

github-actions commented on Jan 15, 2026

dani931004 commented on Jan 15, 2026

pushad commented on Jan 15, 2026

Diphia commented on Jan 15, 2026

Nsomnia commented on Jan 15, 2026

joao-coli commented on Jan 15, 2026

binaryfire commented on Jan 15, 2026

rekram1-node commented on Jan 15, 2026

rekram1-node commented on Jan 15, 2026

rekram1-node commented on Jan 15, 2026

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions