fix(mf): handle missing chunk gracefully and improve expose chunk name logic

[2heal1]

Summary

• Use safe access for chunk_by_ukey to prevent panics when chunk is missing
• Add chunk name fallback logic when processing container entry exposes

Related links

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rspack canceled.

Name	Link
🔨 Latest commit	0573914
🔍 Latest deploy log	https://app.netlify.com/projects/rspack/deploys/6965ddabcd774c00078a0033

[Copilot]

Pull request overview

This PR enhances error handling in the Module Federation plugin by preventing potential panics when chunks are missing from the compilation. It also improves the logic for determining chunk names for container entry exposes by attempting to derive names from the chunk graph before falling back to the configured name.

Changes:

• Replace expect_get with safe get access for chunk lookups to prevent panics when chunks are missing
• Add logic to derive expose chunk names from the chunk graph by traversing blocks, chunk groups, and chunks
• Implement fallback behavior where the configured name is only used if the chunk name cannot be determined from the graph

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
crates/rspack_plugin_mf/src/manifest/mod.rs	Enhanced expose processing with chunk name resolution from the chunk graph and graceful handling of missing chunks through safe access patterns
crates/rspack_plugin_mf/src/manifest/asset.rs	Replaced unsafe expect_get with safe get access for chunk lookups and added early return with empty assets when chunk is missing

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[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 projects in monorepo, 0 projects with changes.

📊 Quick Summary

Project	Total Size	Change
react-10k	5.7 MB	0
react-1k	825.4 KB	0
react-5k	2.7 MB	0
rome	984.3 KB	0
ui-components	2.1 MB	0

Generated by Rsdoctor GitHub Action

[github-actions]

📦 Binary Size-limit

Comparing 0573914 to fix(context-replacement): only apply changes when regex matches (#12657) by Agney Menon

❌ Size increased by 1.00KB from 47.90MB to 47.90MB (⬆️0.00%)

[codspeed-hq]

Merging this PR will not alter performance

✅ 16 untouched benchmarks
⏩ 1 skipped benchmark¹

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_{Comparing fix(mf)/manifest-chunk-panic (0573914) with main (a6892fe)}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩