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fix(es/minifier): Report is_fn_local even if var is hoisted #7876

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merged 1 commit into from Aug 29, 2023

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Description:

BREAKING CHANGE:

Related issue (if exists):
Closes #7847

kdy1
kdy1 previously approved these changes Aug 27, 2023
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Thank you! The change looks sooooo simple.


swc-bump:

  • swc_ecma_minifier

@kdy1 kdy1 changed the title fix(es/minifier):Report is_fn_local even if var is hoisted fix(es/minifier): Report is_fn_local even if var is hoisted Aug 27, 2023
@kdy1 kdy1 enabled auto-merge (squash) August 29, 2023 10:20
@kdy1 kdy1 merged commit 87a47bf into swc-project:main Aug 29, 2023
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@kdy1 kdy1 added this to the v1.3.81 milestone Sep 13, 2023
kdy1 added a commit that referenced this pull request Sep 25, 2023
**Description:**


x-ref: https://vercel.slack.com/archives/C02HY34AKME/p1695334071194139


Reproduction: https://github.com/kdy1/repro-test-mdx-korean



Regression of next.js: `v13.4.11`(swc_core@v0.79.13) => `v13.5.2`
(swc_core@v0.83.12)


 - `next@v13.4.19` works (swc_core@v0.79.59)
 - `next@v13.4.20-canary.3` works (swc_core@v0.79.70)
 -  **`next@v13.4.20-canary.32` fails** (swc_core@v0.83.12)

Commit range:
662f236...e67bf05

- `swc_core@v0.79.70`:
662f236
- `swc_core@v0.83.12`:
e67bf05

Diff: https://gist.github.com/kdy1/047e7e5537c34180d446cb3d5b95fce8

---

I did more investigation by monkey-patching the `next` package.
`.minify()` resolved without an exception.
It means that `.minify()` is producing an invalid ES code.

So... candidates are

 - #7890
 - #7876
 - #7858
 - #7856
 - #7853
 - #7832
@swc-project swc-project locked as resolved and limited conversation to collaborators Oct 13, 2023
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Incorrect minification of rollup commonjs wrapper
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