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claude-code - 💡(How to fix) Fix [BUG] Ultrareview crashes repeatedly on large PRs – no findings produced [1 participants]

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anthropics/claude-code#53033•Fetched 2026-04-25 06:14:11
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PassioneersPassioneers
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PassioneersPassioneers
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Error Message

both ended with the error "Review crashed before producing findings. with a meaningful error message explaining why it could not finish (e.g. PR too

Error Messages/Logs

{"error":"Review crashed before producing findings. See session logs for details."} 4. Receive task notification with the crash error instead of findings

Code Example

{"error":"Review crashed before producing findings. See session logs for details."}

  Session 1 tracking URL: https://claude.ai/code/session_01GExhmd2sRZkNhDRS5QZc5Y
  Session 2 tracking URL: https://claude.ai/code/session_01DwYaG4K3fbVBHYaxP4H7W3
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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

Ultrareview crashes on large PRs before producing any findings. Two consecutive Ultrareviews for the same PR (Passioneers/alice_mvp#24) both ended with the error "Review crashed before producing findings. See session logs for details." – no findings were returned in either case. Both Free Ultrareview credits (2 of 3) were consumed without producing output.

What Should Happen?

The Ultrareview should either complete and return findings, or fail gracefully with a meaningful error message explaining why it could not finish (e.g. PR too large, timeout, rate limit) so the user knows how to proceed.

Error Messages/Logs

{"error":"Review crashed before producing findings. See session logs for details."}

  Session 1 tracking URL: https://claude.ai/code/session_01GExhmd2sRZkNhDRS5QZc5Y
  Session 2 tracking URL: https://claude.ai/code/session_01DwYaG4K3fbVBHYaxP4H7W3

Steps to Reproduce

  1. Open a PR with a substantial number of changed files (Baustein 4.1–5.4, multi-file React/Node.js codebase)
  2. Run /ultrareview <PR-number> in Claude Code
  3. Wait for the remote agent to finish
  4. Receive task notification with the crash error instead of findings
  5. Repeat – crash occurs consistently on the same PR

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

2.1.119 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

The PR contained changes across approximately 10+ files spanning React frontend (JSX) and a Node.js/Express auth server. The review process appeared to begin (candidates were identified and verified according to partial output visible before the crash), but crashed before delivering results.

Two of my three free Ultrareview credits were consumed without producing output. I would appreciate either a credit refund or confirmation that this is a known limitation for PRs of this size, along with guidance on the recommended PR size limit for Ultrareview.

extent analysis

TL;DR

The Ultrareview crash on large PRs may be due to the size of the PR, and a potential workaround is to split the PR into smaller chunks.

Guidance

  • Verify the size limit for Ultrareview by checking the documentation or reaching out to support, as the issue may be related to the PR size.
  • Try splitting the PR into smaller chunks, focusing on a subset of files at a time, to see if the review process completes successfully.
  • Check the session logs for more detailed error information, which may provide clues about the cause of the crash.
  • Consider reaching out to support for a potential credit refund, as two free credits were consumed without producing output.

Example

No code snippet is provided, as the issue is related to the Ultrareview process and not a specific code error.

Notes

The root cause of the issue is uncertain, and more information may be needed to determine the exact cause of the crash. The recommended approach is to try splitting the PR into smaller chunks and verifying the size limit for Ultrareview.

Recommendation

Apply workaround: Split the PR into smaller chunks to see if the review process completes successfully, as this may help mitigate the issue and provide more insight into the cause of the crash.

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claude-code - 💡(How to fix) Fix [BUG] Ultrareview crashes repeatedly on large PRs – no findings produced [1 participants]