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v1.18.30: every prompt fails with TypeError (undefined layer node in Effect layer assembly during SystemPrompt.environment) — works on v1.18.20 #48803
Description
Description
Since upgrading to v1.18.30, every prompt fails with a TypeError during system-prompt assembly. The same config works perfectly on v1.18.20 (verified by A/B testing both binaries with an identical ~/.config/opencode/opencode.jsonc).
Error
TypeError: undefined is not an object (evaluating 'a.name')
at resolve (/$bunfs/root/chunk-36bwgd4p.js:2:1659)
at a (/$bunfs/root/chunk-36bwgd4p.js:2:936)
at map (native:1:11)
at <anonymous> (/$bunfs/root/chunk-36bwgd4p.js:2:1626)
at a (/$bunfs/root/chunk-36bwgd4p.js:2:1166)
at map (native:1:11)
at <anonymous> (/$bunfs/root/chunk-36bwgd4p.js:2:1626)
at a (/$bunfs/root/chunk-36bwgd4p.js:2:1166)
at map (native:1:11)
at <anonymous> (/$bunfs/root/chunk-36bwgd4p.js:2:1390)
at SystemPrompt.environment (/$bunfs/root/chunk-n59f7cwr.js:50:13096)
at SystemPrompt.environment (definition) (/$bunfs/root/chunk-n59f7cwr.js:4:14254)
at SessionPrompt.run (/$bunfs/root/chunk-n59f7cwr.js:50:14576)
...
CLI output:
Error: {
"name": "UnknownError",
"data": { "message": "Unexpected server error. Check server logs for details.", "ref": "err_..." }
}
Analysis
- The crashing frame is Effect-TS layer-graph assembly. The bundled code contains
resolve:(a)=>s.get(a.name)??a(layer-node resolution), and the crash means the visit callback received anundefinedlayer node — i.e. some service layer in 1.18.30 has anundefinedentry in itsdependencies. - It happens during
SystemPrompt.environment→ location-service boot for the session directory. The log repeatedly showsbooting location services. - I could not reproduce any config dependency: the crash persists with (a) all plugins removed, (b) all MCP servers removed, (c) a fresh
XDG_DATA_HOME/XDG_CONFIG_HOME, and (d)env -iwith a minimal environment. This suggests the broken layer dependency is unconditional on this platform.
Reproduction
macOS 15 (Darwin 27.0.0, arm64, Homebrew install):
opencode run "say hi" # v1.18.30 -> UnknownError; log shows the TypeError above
# same command with v1.18.20 binary -> worksEnvironment
- opencode 1.18.30 (Homebrew,
1.18.30_1), macOS arm64 (Apple Silicon) - Provider: zai-coding-plan (GLM), 7 MCP servers configured
- Logs show sporadic one-off occurrences of the same error on earlier versions (~1/month since July), but v1.18.30 makes it 100% reproducible.
Happy to provide full logs or test a fix build.
Reacted by Bartosz Fenski, lucas, WZHMAT1, DanCanCos, Ondřej Hložek, pomp and Daniel
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github-actions commentedon Sep 13, 2026
This issue might be a duplicate of existing issues. Please check:
TypeError: undefined is not an object (evaluating 'a.name')crash inSystemPrompt.environmenton v1.18.30, LinuxSystemPrompt.environment, confirmed working on earlier versionsfenio commentedon Sep 13, 2026
Current version is completely unusable under MacOS
DanCanCos commentedon Sep 14, 2026
Same issue. MacOS M-series. Reinstalling didn't help, running lower version worked. Interestingly, uninstalling with brew and installing 1.18.30 from the tap as recommended in the Readme with
brew install anomalyco/tap/opencodeworks perfectly fine, too.YurBoiDanny commentedon Sep 15, 2026
Thanks, this worked for me as well on my macbook (m4)