[kixelated]

Problem

#484 left two follow-ups:

• Debug of LazyCell and LazyLock was unchecked. A probe on main refuses both: "unsupported call to <LazyCell<u8, ..> as Debug>::fmt", and the same for LazyLock.
• feat(ts): translate Debug of cells and locks, keeping a held value's effects in order #484's Cell Debug fix (read the value before writing the prefix) has no differential test, because only a crate's own fmt::Write with placeholders can observe the order, and the translator refuses that.

Approach

• New [XS] quest quest/m3/ts-lazy-debug.md: LazyCell(..)/LazyLock(..), or (<uninit>) before a force, as std writes them. It notes the runtime's #private state needs a reading method, as onceDebug has. Listed in m3 after the related lazy-writes quest.
• quest/m3/ts-fmt-calls.md already plans a crate's own fmt::Write with placeholders. Rather than duplicating it, it gains a step: a differential case for a Cell's Debug into a writer that sets that cell.

Impact

• Quests only; no public API change.

Alternatives

• A separate fmt::Write quest: it would duplicate ts-fmt-calls.md.

Follow-ups

• None.

Review

• Reviewer: Codex, gpt-6.1-sol, medium (quest review).
• Round 1 on 8e6d2c9: no findings.

🤖 Generated with Claude Code

[coderabbitai]

Warning

Review limit reached

You've used all free OSS reviews for now. Wait for the free limit to reset to keep reviewing this public repository.

Next included review available in 42 minutes.

Check out review usage here.

View limit details

Limit details: You’ve used the included review currently available.

Learn how review limits work.

Review configuration:

Run configuration

• Source mode: Auto
• Repository: Unavailable
• Branch: Unavailable
• File: No configuration file from this repository applied
• Commit: Unavailable
• Layers: Organization UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: de737646-4a7d-4650-84cf-b8e7d9e653a6

Commits

Reviewing files that changed from the base of the PR and between 52422a1 and 8e6d2c9.

Files selected for processing: 3

• quest/m3/README.md
• quest/m3/ts-fmt-calls.md
• quest/m3/ts-lazy-debug.md

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

Share

• X
• Mastodon
• Reddit
• LinkedIn

CodeRabbit Verify

• Run CodeRabbit Verify to test the changes in this pull request.