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codex - 💡(How to fix) Fix Codex review tool cannot inspect local commits due to bwrap sandbox error and does not request escalation [3 comments, 2 participants]

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openai/codex#19210•Fetched 2026-04-24 05:58:42
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bromdunbromdun
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Error Message

I’m seeing a regression with the Codex review tool in an environment where normal Codex shell commands require escalation because sandboxed local commands fail with a bubblewrap/user-namespace error. I could not inspect these local commits: sandboxed local commands fail with the bwrap namespace error, and the SHAs are not present in the connected GitHub repository. With no accessible diff, I cannot report actionable code findings. namespace error. 5. The local inspection fails with a bwrap namespace error.

Root Cause

I’m seeing a regression with the Codex review tool in an environment where normal Codex shell commands require escalation because sandboxed local commands fail with a bubblewrap/user-namespace error.

Fix Action

Fix / Workaround

  • Local pre-push code review is unavailable in this environment.
    • The only workaround is to push commits to GitHub first or manually provide a diff to another reviewer.
RAW_BUFFERClick to expand / collapse

What version of Codex CLI is running?

v(0.124.0)

What subscription do you have?

Pro

Which model were you using?

GPT-5.5 xhigh

What platform is your computer?

Linux 369b745156a0 6.14.11 #1-NixOS SMP PREEMPT_DYNAMIC Tue Jan 1 00:00:00 UTC 1980 x86_64 GNU/Linux

What terminal emulator and version are you using (if applicable)?

No response

What issue are you seeing?

I’m seeing a regression with the Codex review tool in an environment where normal Codex shell commands require escalation because sandboxed local commands fail with a bubblewrap/user-namespace error.

The review tool failed with:

I could not inspect these local commits: sandboxed local commands fail with the bwrap namespace error, and the SHAs are not present in the connected GitHub repository. With no accessible diff, I cannot report actionable code findings.

Context:

  • Environment: Replit/workspace-style environment where sandboxed commands fail with bwrap namespace errors.
  • Normal Codex commands in the same session work when rerun with escalation.
  • The review tool appears to attempt sandboxed local commands only, fails on bwrap, and does not request escalation.
  • At the time, the commits were local-only and not pushed to GitHub, so the GitHub fallback could not find the SHAs.
  • This workflow reportedly worked previously with GPT-5.4 in the same environment.

Impact:

  • Local pre-push code review is unavailable in this environment.
  • The only workaround is to push commits to GitHub first or manually provide a diff to another reviewer.

What steps can reproduce the bug?

  1. Open a Codex session in a Replit/workspace environment where sandboxed shell commands fail with a bwrap / user- namespace error.
  2. Make one or more local commits that have not been pushed to GitHub.
  3. Ask the Codex review tool to review those local commits, for example: Review commits <base>..<head>
  4. Observe that the review tool attempts to inspect the commits locally using sandboxed commands.
  5. The local inspection fails with a bwrap namespace error.
  6. The review tool then attempts/falls back to GitHub lookup, but the SHAs are not present because the commits are local-only.
  7. The review returns no actionable findings and reports that it cannot inspect the commits.

What is the expected behavior?

Expected behavior:

  • The review tool should either request/use the same escalation path available to Codex shell commands, or surface a clear instruction that the commits must be pushed/available via GitHub.
  • Ideally, it should be able to inspect local diffs in the same environment where Codex itself can inspect them with escalation.

Actual behavior:

  • Review terminated without inspecting the diff and without actionable findings.
  • The failure reason was environmental/tooling-related, not related to the code under review.

Additional information

Suggested fix:

  • Allow the review tool to use escalation when sandboxed local commands fail due to bwrap/namespace restrictions.
  • Alternatively, detect this failure mode and prompt the user to push the branch or provide a diff, rather than returning no actionable findings.

extent analysis

TL;DR

The review tool should be modified to either request escalation when sandboxed local commands fail due to bwrap/namespace restrictions or prompt the user to push the branch or provide a diff.

Guidance

  • The issue is likely caused by the review tool attempting to use sandboxed local commands without escalation, which fails due to bwrap/namespace errors in the Replit/workspace environment.
  • To verify, try running the review tool with escalation (e.g., using sudo or equivalent) to see if it can successfully inspect local commits.
  • A potential workaround is to push local commits to GitHub before running the review tool, allowing it to fall back to GitHub lookup.
  • The review tool could be modified to detect bwrap/namespace errors and prompt the user to push the branch or provide a diff, rather than returning no actionable findings.

Notes

The suggested fix requires modifying the review tool to handle bwrap/namespace errors and either request escalation or prompt the user for alternative actions.

Recommendation

Apply a workaround by pushing local commits to GitHub before running the review tool, as this allows the tool to fall back to GitHub lookup and provide actionable findings.

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