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Crash: EXC_BREAKPOINT in ONNX Runtime 1.21.0 via Bun N-API on Apple Silicon #26132
Closed as duplicate
Description
Crash Report
OpenCode crashes with EXC_BREAKPOINT (SIGTRAP) approximately 90 seconds after launch. The crash originates from a worker thread interacting with ONNX Runtime 1.21.0 through Bun's N-API bridge.
Environment
| Item | Value |
|---|---|
| OS | macOS 26.3 (25D125) |
| CPU | ARM64 — Apple Silicon (MacBookPro18,3) |
| Runtime | Bun (JSC-based, confirmed by __BUN VM region) |
| ONNX Runtime | 1.21.0 (libonnxruntime.1.21.0.dylib) |
| Install path | /opt/homebrew/*/opencode (Homebrew) |
Crash Details
- Exception:
EXC_BREAKPOINT/ SignalSIGTRAP - Exception codes:
0x0000000000000001, 0x0000000102fb7ee4 - Faulting thread: 8 (named "Worker")
- Process uptime at crash: ~92 s (launched 14:25:38, crashed 14:27:10)
Loaded Native Modules
| Module | Base | Size |
|---|---|---|
onnxruntime_binding.node |
0x104900000 | 147456 |
libonnxruntime.1.21.0.dylib |
0x153F80000 | ~20 MB |
sharp-darwin-arm64.node |
0x1049E4000 | 180224 |
libvips-cpp.8.17.3.dylib |
0x15228C000 | ~14 MB |
Hypothesis
The crash address 0x0000000102fb7ee4 falls within the main .opencode binary image (base 0x100E58000, size ~60 MB), suggesting the SIGTRAP fires inside Bun's own code — likely its N-API / NAPI bridge layer — while servicing a call from onnxruntime_binding.node.
Known friction points:
- Bun's N-API implementation has documented gaps vs. Node.js, particularly around threadsafe functions, reference counting, and error propagation from native modules.
- ONNX Runtime 1.21.0 uses background inference threads that call back into JS via N-API threadsafe functions — a path that has historically been fragile under Bun.
Raw Crash Report
Full .ips header (JSON)
{
"app_name": "opencode",
"timestamp": "2026-05-07 14:27:11.00 +0800",
"platform": 1,
"bug_type": "309",
"os_version": "macOS 26.3 (25D125)",
"incident_id": "6748F44C-334D-434E-9D32-2EE19B21B5B6"
}Exception & termination
{
"exception": {
"codes": "0x0000000000000001, 0x0000000102fb7ee4",
"rawCodes": [1, 4345003748],
"type": "EXC_BREAKPOINT",
"signal": "SIGTRAP"
},
"termination": {
"flags": 0,
"code": 5,
"namespace": "SIGNAL",
"indicator": "Trace/BPT trap: 5",
"byProc": "exc handler",
"byPid": 21780
}
}VM Summary (excerpt)
JS JIT generated code 512.0M 3
JS VM Gigacage 1.5G 6
JS VM Gigacage (reserved) 54.5G 3
WebKit Malloc 13.0G 51
__BUN 39.5M 1
Activity
github-actions commentedon May 7, 2026
This issue doesn't fully meet our contributing guidelines.
What needs to be fixed:
macOS 26.3) appears incorrect — the current macOS release line is 15.x (Sequoia). Please verify and correct your environment information.Please edit this issue to address the above within 2 hours, or it will be automatically closed.
This issue might be a duplicate of an existing issue. Please check:
trace trapcrash on macOS Apple SiliconIf you believe this was flagged incorrectly, please let a maintainer know.