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Versions after 1.2.10 use unstable bun canary version which lead to loading project root .env files into bun and crashes opencode on startup #15056
Description
Description
opencode crashes on startup due to instable bun canarry version loading .env file from project root directory.
Plugins
oh-my-opencode
OpenCode version
1.2.10 last stable, 1.2.11-1.2.13 crashing
Steps to reproduce
- Place any .env file into root project directory
- Make sure that you use opencode version 1.2.11 or higher (till 1.2.13 tested)
- run in terminal "opencode"
- Get the error:
Bun Canary v1.3.10-canary.100 (6b1d6c76) Windows x64 (baseline)
Windows v.win10_cu
CPU: sse42 avx avx2
Args: "C:\Users\Professional\scoop\apps\opencode\current\opencode.exe" "--user-agent=opencode/1.2.12" "--use-system-ca" "--"
Features: Bun.stderr(2) Bun.stdin(2) Bun.stdout(2) fetch(2) jsc standalone_executable workers_spawned
Builtins: "bun:ffi" "bun:main" "bun:sqlite" "node:assert" "node:async_hooks" "node:buffer" "node:child_process" "node:console" "node:crypto" "node:dns" "node:events" "node:fs" "node:fs/promises" "node:http" "node:https" "node:module" "node:net" "node:os" "node:path" "node:process" "node:querystring" "node:readline" "node:stream" "node:stream/consumers" "node:stream/promises" "node:string_decoder" "node:timers" "node:timers/promises" "node:tls" "node:tty" "node:url" "node:util" "undici" "node:v8" "node:http2" "node:diagnostics_channel" "node:dgram"
Elapsed: 753ms | User: 703ms | Sys: 281ms
RSS: 0.54GB | Peak: 0.54GB | Commit: 0.89GB | Faults: 138710 | Machine: 34.16GBpanic(thread 10416): Internal assertion failure:
ThreadLockis locked by thread 14580, not thread 10416
oh no: Bun has crashed. This indicates a bug in Bun, not your code.To send a redacted crash report to Bun's team,
please file a GitHub issue using the link below:
- Remove .env file or set up opencode version to 1.2.10 and opencode starting again
Screenshot and/or share link
No response
Operating System
Windows 11
Terminal
Windows Powershell
Activity
github-actions commentedon Feb 25, 2026
This issue might be a duplicate of existing issues. Please check:
These issues describe the same or very similar symptoms: .env file in project root + Bun Canary ThreadLock panic causing opencode to crash on startup in versions 1.2.11+.
FJRG2007 commentedon Feb 25, 2026
I also get this error.
zhenzhuzz commentedon Feb 25, 2026
Confirmed workaround: move
.envto parent directoryBesides downgrading to v1.2.10, I found a cleaner persistent workaround:
move the
.envfile one level up to the parent directory of your project.Before (crashes):
D:\myproject.env ← Bun auto-loads this → ThreadLock panic
After (works):
D:
└── .env ← Bun doesn't scan parent dirs → no crash
└── myproject\ ← run opencode from here, works fine
This is cleaner than temporarily renaming because the file stays permanently
accessible (
source ../.envstill works for loading API keys).Secondary symptom: terminal stuck in mouse-tracking mode after crash
When OpenCode crashes due to this bug, the terminal is left in mouse-tracking
mode. Any subsequent mouse scroll or click prints raw SGR sequences
(screenshot 1 below — this happens continuously until you open a new terminal tab):
The Bun crash itself looks like this (screenshot 2):
Git Bash also works after the fix
After moving
.envout of the project root, OpenCode works normally inGit Bash (Windows Terminal) — not just PowerShell. The terminal corruption
from the crash was making Git Bash appear incompatible, but it works fine
once the crash is prevented.
Environment: Windows 11, OpenCode v1.2.12, Windows Terminal (Git Bash + PowerShell)
DomEscobar commentedon Feb 25, 2026
#15010 (comment)
Hona commentedon Feb 26, 2026
please upgrade to latest OpenCode v1.2.15 - and try again.
There should be no more segfaults/crashes.
Can you confirm it works fine after the version is >v1.2.15 :)