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Code Issues 5.9k Packages Projects Releases 19 Wiki Activity

Plugin syntax errors are handled poorly #3174

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opened 2026-02-16 17:38:59 -05:00 by yindo · 5 comments
yindo commented 2026-02-16 17:38:59 -05:00
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Originally created by @CodeReclaimers on GitHub (Nov 27, 2025).

Originally assigned to: @rekram1-node on GitHub.

Description

The Problem

Plugin syntax errors are handled poorly:

  • Errors only show in stdout as raw JSON (not in UI)
  • Error messages are unhelpful ("AggregateError: 2 errors" with no details)
  • No indication in the UI that a plugin failed to load
  • May crash with core dump in some cases

What Happened

While developing a plugin, a missing closing brace }; caused:

  1. First attempt: OpenCode crashed with segmentation fault (core dump)
  2. After restart: Same error now shows JSON to stdout, then OpenCode exits
  3. Result: Very difficult to debug - had to watch terminal output

The Syntax Error

File: session-logger-broken.ts
Line: 91
Error: Missing closing brace for object literal

const example = {
  // ... properties
}, // ← Missing semicolon and closing brace here

examples.push(example); // ← This causes syntax error

What Should Happen

✅ Show error in the UI (toast notification or status bar)
✅ Display the actual syntax error with line number
✅ Show which plugin failed
✅ List loaded/failed plugins somewhere visible
✅ Never crash the main process

BUG_REPORT.md
session-logger-broken copy.ts.txt

OpenCode version

1.0.119

Steps to reproduce

  1. Create a plugin file .opencode/plugin/session-logger-broken.ts
  2. Copy the contents of the attached session-logger-broken copy.ts.txt file (contains syntax error - missing closing brace)
  3. Start OpenCode with opencode command
  4. Current Result: JSON error printed to stdout, OpenCode exits
  5. To see the error: Check stdout/terminal output for JSON error message
  6. Previous Result (in same terminal window but different tab): OpenCode would crash with segmentation fault

See my comment below with a script that reliably causes opencode to dump core.

session-logger-broken copy.ts.txt

Screenshot and/or share link

No TUI ever appeared, I got this on stdout instead and opencode terminated:

{
"name": "UnknownError",
"data": {
"message": "AggregateError: 2 errors building "/home/alan/opencode-dspy/.opencode/plugin/session-logger-broken.ts"\n at requestFetch (native:1:11)\n at (native:11:43)\n at (native:11:37)\n at requestInstantiate (native:1:11)\n at requestSatisfyUtil (native:1:11)\n at requestSatisfy (native:1:11)\n at requestImportModule (native:2)\n at requestImportModule (native:1:17)\n at (src/plugin/index.ts:42:32)\n at processTicksAndRejections (native:7:39)"
}
}

Operating System

Ubuntu 22.04

Terminal

kitty

Originally created by @CodeReclaimers on GitHub (Nov 27, 2025). Originally assigned to: @rekram1-node on GitHub. ### Description ## The Problem Plugin syntax errors are handled poorly: - Errors only show in stdout as raw JSON (not in UI) - Error messages are unhelpful ("AggregateError: 2 errors" with no details) - No indication in the UI that a plugin failed to load - May crash with core dump in some cases ## What Happened While developing a plugin, a missing closing brace `};` caused: 1. **First attempt**: OpenCode crashed with segmentation fault (core dump) 2. **After restart**: Same error now shows JSON to stdout, then OpenCode exits 3. **Result**: Very difficult to debug - had to watch terminal output ## The Syntax Error File: `session-logger-broken.ts` Line: 91 Error: Missing closing brace for object literal ```typescript const example = { // ... properties }, // ← Missing semicolon and closing brace here examples.push(example); // ← This causes syntax error ``` ## What Should Happen ✅ Show error in the UI (toast notification or status bar) ✅ Display the actual syntax error with line number ✅ Show which plugin failed ✅ List loaded/failed plugins somewhere visible ✅ Never crash the main process [BUG_REPORT.md](https://github.com/user-attachments/files/23813158/BUG_REPORT.md) [session-logger-broken copy.ts.txt](https://github.com/user-attachments/files/23813254/session-logger-broken.copy.ts.txt) ### OpenCode version 1.0.119 ### Steps to reproduce 1. Create a plugin file `.opencode/plugin/session-logger-broken.ts` 2. Copy the contents of the attached `session-logger-broken copy.ts.txt` file (contains syntax error - missing closing brace) 3. Start OpenCode with `opencode` command 4. **Current Result**: JSON error printed to stdout, OpenCode exits 5. **To see the error**: Check stdout/terminal output for JSON error message 6. **Previous Result (in same terminal window but different tab)**: OpenCode would crash with segmentation fault See my comment below with a [script](https://github.com/user-attachments/files/23813456/session-logger-severely-broken.ts.txt) that reliably causes opencode to dump core. [session-logger-broken copy.ts.txt](https://github.com/user-attachments/files/23813209/session-logger-broken.copy.ts.txt) ### Screenshot and/or share link No TUI ever appeared, I got this on stdout instead and opencode terminated: { "name": "UnknownError", "data": { "message": "AggregateError: 2 errors building \"/home/alan/opencode-dspy/.opencode/plugin/session-logger-broken.ts\"\n at requestFetch (native:1:11)\n at <anonymous> (native:11:43)\n at <anonymous> (native:11:37)\n at requestInstantiate (native:1:11)\n at requestSatisfyUtil (native:1:11)\n at requestSatisfy (native:1:11)\n at requestImportModule (native:2)\n at requestImportModule (native:1:17)\n at <anonymous> (src/plugin/index.ts:42:32)\n at processTicksAndRejections (native:7:39)" } } ### Operating System Ubuntu 22.04 ### Terminal kitty
yindo added the bug label 2026-02-16 17:38:59 -05:00
yindo commented 2026-02-16 17:38:59 -05:00
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@CodeReclaimers commented on GitHub (Nov 27, 2025):

(with props to opencode for writing its own bug report)

@CodeReclaimers commented on GitHub (Nov 27, 2025): (with props to opencode for writing its own bug report)
yindo commented 2026-02-16 17:38:59 -05:00
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@github-actions[bot] commented on GitHub (Nov 27, 2025):

This issue might be a duplicate of existing issues. Please check:

  • #3392: Plugin loading errors causing crashes on startup (scoped npm packages) - shows similar pattern of config corruption and crashes
  • #3537: Plugin/config file parsing crashes OpenCode on startup - similar pattern of crashes with poor error messages
  • #4650: Flash crash on startup with empty JSON output to stdout - very similar symptom of exiting with unhelpful JSON
  • #4145: Crashes on bad config without helpful feedback - general lack of error handling improvements
  • #3568: Crashes immediately after startup with unhelpful error messages
  • #2455: General need for improved error handling and reporting across the app
  • #4846: Plugin loading/event subscription failures - related to plugin initialization issues

Feel free to ignore if none of these address your specific case.

@github-actions[bot] commented on GitHub (Nov 27, 2025): This issue might be a duplicate of existing issues. Please check: - #3392: Plugin loading errors causing crashes on startup (scoped npm packages) - shows similar pattern of config corruption and crashes - #3537: Plugin/config file parsing crashes OpenCode on startup - similar pattern of crashes with poor error messages - #4650: Flash crash on startup with empty JSON output to stdout - very similar symptom of exiting with unhelpful JSON - #4145: Crashes on bad config without helpful feedback - general lack of error handling improvements - #3568: Crashes immediately after startup with unhelpful error messages - #2455: General need for improved error handling and reporting across the app - #4846: Plugin loading/event subscription failures - related to plugin initialization issues Feel free to ignore if none of these address your specific case.
yindo commented 2026-02-16 17:38:59 -05:00
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@CodeReclaimers commented on GitHub (Nov 27, 2025):

This is at least a partial duplicate, but the initial behavior of opencode when I first ran with this plugin was to dump core (and FUBAR my terminal tab) so it seems like there's something more going on sometimes than just an exit with a JSON message.

@CodeReclaimers commented on GitHub (Nov 27, 2025): This is at least a partial duplicate, but the initial behavior of opencode when I first ran with this plugin was to dump core (and FUBAR my terminal tab) so it seems like there's something more going on sometimes than just an exit with a JSON message.
yindo commented 2026-02-16 17:38:59 -05:00
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@CodeReclaimers commented on GitHub (Nov 27, 2025):

I can reliably get a core dump with this plugin script when starting opencode from the directory opencode-dspy. Removing the script results in a successful opencode launch.

session-logger-severely-broken.ts.txt

Image
@CodeReclaimers commented on GitHub (Nov 27, 2025): I can reliably get a core dump with this plugin script when starting opencode from the directory opencode-dspy. Removing the script results in a successful opencode launch. [session-logger-severely-broken.ts.txt](https://github.com/user-attachments/files/23813456/session-logger-severely-broken.ts.txt) <img width="394" height="119" alt="Image" src="https://github.com/user-attachments/assets/a3fbb384-6fd2-4bb0-ae38-b00df002a8cf" />
yindo commented 2026-02-16 17:38:59 -05:00
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@rekram1-node commented on GitHub (Nov 28, 2025):

ill check it out

@rekram1-node commented on GitHub (Nov 28, 2025): ill check it out
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Reference: anomalyco/opencode#3174
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