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Segfault in embedded Bun 1.3.14 (JSC microtask drain, llint_op_call_ignore_result loop) on Linux x86_64 baseline — opencode 1.18.34 #52773
Description
Crash
Bun-embedded segfault, reported via bun.report:
Bun v1.3.14 (0d9b296a) on linux x86_64_baseline [StandaloneExecutable]
Segmentation fault at address 0x7B779ABA01FC
`llint_op_call_ignore_result` x7 -> `llint_call_javascript` -> `JSC::Interpreter::executeCallImpl`
via `JSC::MicrotaskQueue::drain` / `JSC::VM::drainMicrotasks` / `Bun::jsFunctionDrainMicrotaskQueue`,
with `JSGenerator` frames on the microtask path (`JSMicrotask.cpp:143`, `MicrotaskCallInlines.h:84`)
Features: spawn, standalone_executable, workers_spawned, napi_module_register, process_dlopen, Bun.stderr, Bun.stdin, Bun.stdout, fetch, jsc
OpenCode version
1.18.34 (npm [email protected], latest tag). Verified the binary embeds Bun 1.3.14 (bun-linux-x64-baseline.zip / v1.3.14 (0d9b296a) strings). Today's dev snapshot (0.0.0-dev-202610020321) still embeds Bun 1.3.14 as well, so no available build fixes this yet.
Environment
- Linux x86_64 (glibc, AVX2 capable), kernel via Hetzner cloud VM
- Long-running
opencode serve --port 4096+ TUI sessions + a Telegram bot holding SSE streams per directory - The serve process survived (uptime 2+ days); the crash took down a client-side process (TUI/one-shot run)
Notes
- Stack differs from server: v2.0.11 background service segfaults repeatedly (SIGSEGV, Linux x64) #50246 (v2 service, stripped frames) — this one has full JSC frames pointing at the microtask-drain/generator path, same Bun revision (0d9b296a) as [Crash] Segfault at 0x0 in Bun 1.3.14 bundled with opencode-ai 1.17.9 oven-sh/bun#32663-class crashes.
- Bun latest is 1.4.2; the fix on the opencode side is presumably a rebuild against Bun >= 1.4.x once the JSC bug is confirmed fixed there.
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github-actions commentedon Oct 2, 2026
This issue doesn't fully meet our contributing guidelines.
What needs to be fixed:
Crash,Environment, andNotesheadings instead of the template.Please edit this issue to address the above within 72 hours, or it will be automatically closed.
This issue might be a duplicate of existing issues. Please check:
opencode serve; the reported crash signature differs.If you believe this was flagged incorrectly, please let a maintainer know.
github-actions commentedon Oct 5, 2026
This issue has been automatically closed because it was not updated to meet our contributing guidelines within the 72-hour window.
Feel free to open a new issue that follows our issue templates.