openclaw - 💡(How to fix) Fix [Bug]: Dev channel fails to build (preflight lint fails) [1 comments, 1 participants]

openclaw2026-04-07 02:48:14

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openclaw/openclaw#62261•Fetched 2026-04-08 03:07:01

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tturnerdev

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tturnerdev

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labeled ×2commented ×1

Stable release (last: 2026.4.5) was working fine.

Tried to switch to dev update channel, openclaw update --channel dev

Got a few "preflight lint" errors (different commit hashes) that look like:

 ✗ preflight lint (5291a2cf) (54.18s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 68423,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2

Error Message

Update Result: ERROR Update Result: ERROR

Root Cause

Stable release (last: 2026.4.5) was working fine.

Tried to switch to dev update channel, openclaw update --channel dev

Got a few "preflight lint" errors (different commit hashes) that look like:

 ✗ preflight lint (5291a2cf) (54.18s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 68423,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2

Code Example

✗ preflight lint (5291a2cf) (54.18s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 68423,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2

---

Update Result: ERROR
  Root: /home/redact/openclaw
  Reason: preflight lint (338c7b8d)
  Before: 2026.4.6
  After: 2026.4.6

Total time: 392.25s

---

$ openclaw update --channel dev
Updating OpenClaw...

│
◇  ✓ Cloning git checkout (11.75s)
│
◇  ✓ Working directory is clean (534ms)
│
◇  ✓ Upstream branch exists (2ms)
│
◇  ✓ Fetching latest changes (236ms)
│
◇  ✓ Resolving upstream commit (4ms)
│
◇  ✓ Enumerating candidate commits (3ms)
│
◇  ✓ Preparing preflight worktree (388ms)
│
◇  ✓ preflight checkout (338c7b8d) (521ms)
│
◇  ✓ preflight deps install (338c7b8d) (19.59s)
│
◇  ✓ preflight build (338c7b8d) (27.26s)
│
◇  ✗ preflight lint (338c7b8d) (17.16s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 66986,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2
│
◇  ✓ preflight checkout (8cea63c6) (68ms)
│
◇  ✓ preflight deps install (8cea63c6) (8.85s)
│
◇  ✓ preflight build (8cea63c6) (23.45s)
│
◇  ✗ preflight lint (8cea63c6) (7.66s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 67828,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2
│
◇  ✓ preflight checkout (5291a2cf) (71ms)
│
◇  ✓ preflight deps install (5291a2cf) (1.36s)
│
◇  ✓ preflight build (5291a2cf) (22.51s)
│
◇  ✗ preflight lint (5291a2cf) (54.18s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 68423,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2
│
◇  ✓ preflight checkout (6ab359f5) (74ms)
│
◇  ✓ preflight deps install (6ab359f5) (1.36s)
│
◇  ✓ preflight build (6ab359f5) (22.76s)
│
◇  ✓ preflight lint (6ab359f5) (128.58s)
│
◇  ✓ Cleaning preflight worktree (1.9s)
│
◇  ✓ Rebasing onto target commit (26ms)
│
◇  ✓ Installing dependencies (1.52s)
│
◇  ✓ Building (26.64s)
│
◇  ✓ Building UI assets (961ms)
│
◇  ✓ Running doctor checks (10.91s)
│
◇  ✓ Verifying update (2ms)

Update Result: ERROR
  Root: /home/redact/openclaw
  Reason: preflight lint (338c7b8d)
  Before: 2026.4.6
  After: 2026.4.6

Total time: 392.25s

RAW_BUFFERClick to expand / collapse

Bug type

Regression (worked before, now fails)

Beta release blocker

Yes

Summary

Stable release (last: 2026.4.5) was working fine.

Tried to switch to dev update channel, openclaw update --channel dev

Got a few "preflight lint" errors (different commit hashes) that look like:

 ✗ preflight lint (5291a2cf) (54.18s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 68423,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2

Steps to reproduce

openclaw update --channel dev

Expected behavior

Update should work.

Actual behavior

Update fails with lint errors, result:

Update Result: ERROR
  Root: /home/redact/openclaw
  Reason: preflight lint (338c7b8d)
  Before: 2026.4.6
  After: 2026.4.6

Total time: 392.25s

OpenClaw version

338c7b8d

Operating system

Linux (Ubuntu v24)

Install method

npm

Model

anthropic/opus-5-6

Provider / routing chain

openclaw

Additional provider/model setup details

No response

Logs, screenshots, and evidence

$ openclaw update --channel dev
Updating OpenClaw...

│
◇  ✓ Cloning git checkout (11.75s)
│
◇  ✓ Working directory is clean (534ms)
│
◇  ✓ Upstream branch exists (2ms)
│
◇  ✓ Fetching latest changes (236ms)
│
◇  ✓ Resolving upstream commit (4ms)
│
◇  ✓ Enumerating candidate commits (3ms)
│
◇  ✓ Preparing preflight worktree (388ms)
│
◇  ✓ preflight checkout (338c7b8d) (521ms)
│
◇  ✓ preflight deps install (338c7b8d) (19.59s)
│
◇  ✓ preflight build (338c7b8d) (27.26s)
│
◇  ✗ preflight lint (338c7b8d) (17.16s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 66986,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2
│
◇  ✓ preflight checkout (8cea63c6) (68ms)
│
◇  ✓ preflight deps install (8cea63c6) (8.85s)
│
◇  ✓ preflight build (8cea63c6) (23.45s)
│
◇  ✗ preflight lint (8cea63c6) (7.66s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 67828,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2
│
◇  ✓ preflight checkout (5291a2cf) (71ms)
│
◇  ✓ preflight deps install (5291a2cf) (1.36s)
│
◇  ✓ preflight build (5291a2cf) (22.51s)
│
◇  ✗ preflight lint (5291a2cf) (54.18s)
        at TracingChannel.traceSync (node:diagnostics_channel:328:14) {
      status: null,
      signal: 'SIGKILL',
      output: [ null, null, null ],
      pid: 68423,
      stdout: null,
      stderr: null
    }
    Node.js v22.22.2
│
◇  ✓ preflight checkout (6ab359f5) (74ms)
│
◇  ✓ preflight deps install (6ab359f5) (1.36s)
│
◇  ✓ preflight build (6ab359f5) (22.76s)
│
◇  ✓ preflight lint (6ab359f5) (128.58s)
│
◇  ✓ Cleaning preflight worktree (1.9s)
│
◇  ✓ Rebasing onto target commit (26ms)
│
◇  ✓ Installing dependencies (1.52s)
│
◇  ✓ Building (26.64s)
│
◇  ✓ Building UI assets (961ms)
│
◇  ✓ Running doctor checks (10.91s)
│
◇  ✓ Verifying update (2ms)

Update Result: ERROR
  Root: /home/redact/openclaw
  Reason: preflight lint (338c7b8d)
  Before: 2026.4.6
  After: 2026.4.6

Total time: 392.25s

Impact and severity

Can't get latest commits which include all the custom cliBackends reverted commits

Additional information

No response

extent analysis

TL;DR

The most likely fix is to investigate and resolve the preflight lint errors that are causing the update to fail.

Guidance

Investigate the preflight lint errors by checking the logs for more detailed error messages or running the preflight lint step manually to see if it provides more information.
Check if there are any issues with the node:diagnostics_channel module or if it's related to the SIGKILL signal being received.
Try updating Node.js to a newer version to see if it resolves the issue, as the current version (v22.22.2) might be causing compatibility issues.
Consider reaching out to the OpenClaw community or developers for further assistance, as the issue seems to be related to the openclaw update process.

Example

No code snippet is provided as it's not clearly supported by the issue.

Notes

The issue seems to be related to the preflight lint step, which is failing with a SIGKILL signal. This could be due to a variety of reasons, including compatibility issues with Node.js or problems with the node:diagnostics_channel module.

Recommendation

Apply workaround: Try to resolve the preflight lint errors by investigating the logs and checking for compatibility issues with Node.js. If the issue persists, consider reaching out to the OpenClaw community or developers for further assistance.

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Works

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Easy Fix

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Time Saver

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Blocking

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Common Issue

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Flaky / Intermittent

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Verified / Reproducible

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FAQ

Expected behavior

Update should work.

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openclaw - 💡(How to fix) Fix [Bug]: Dev channel fails to build (preflight lint fails) [1 comments, 1 participants]

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Error Message

Root Cause

Code Example

Bug type

Beta release blocker

Summary

Steps to reproduce

Expected behavior

Actual behavior

OpenClaw version

Operating system

Install method

Model

Provider / routing chain

Additional provider/model setup details

Logs, screenshots, and evidence

Impact and severity

Additional information

extent analysis

TL;DR

Guidance

Example

Notes

Recommendation

FAQ

Expected behavior

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