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OpenCode 1.3.2 crashes on load with TypeError: e.diffs.map is not a function #19298
Description
Description
Version
1.3.2
Summary
The application crashes while loading and shows a fatal error screen instead of handling the invalid data gracefully.
Error message
TypeError: e.diffs.map is not a function
Observed behavior
On opening the app at http://localhost:4096, the UI fails to load and displays:
- “Something went wrong”
- “An error occurred while loading the application.”
The stack trace includes references to:
/assets/session-...js/assets/index-...js
This suggests the crash happens while rendering or processing session data.
Expected behavior
If diffs is malformed, missing, or in a legacy format, the app should:
- fail gracefully
- ignore or sanitize the bad payload
- show a recoverable error for the affected session only
It should not crash the entire application.
Possible cause
It looks like the code assumes e.diffs is always an array and calls .map() on it, but in this case diffs appears to be a non-array value such
Plugins
No response
OpenCode version
No response
Steps to reproduce
No response
Screenshot and/or share link
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Operating System
No response
Terminal
No response
Activity
d2jvkpn commentedon Mar 26, 2026
github-actions commentedon Mar 26, 2026
This issue might be a duplicate of existing issues. Please check:
If your issue is the same, please close this one and add your information to the existing reports instead.
andybons commentedon Mar 26, 2026
@d2jvkpn I just saw this as well and it was caused by Content Security Policy violations. Do you see any in your console? Are you running behind a proxy (I am)
thdxr commentedon Mar 26, 2026
Fixed by #19299 - This error was caused by version drift between the web UI assets served from the CDN and the local server. Version 1.3.3 is going out now and embeds the WebUI directly in the binary, eliminating any version drift between the server and web UI.
thdxr commentedon Mar 26, 2026
Closing as fixed by #19299
d2jvkpn commentedon Mar 26, 2026
Yes, I'm running OpenCode in a container, and I've set grrp_proxy and http_proxy
.