**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: 662f236aa5...e67bf05f9d - `swc_core@v0.79.70`: 662f236aa5 - `swc_core@v0.83.12`: e67bf05f9d 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 - https://github.com/swc-project/swc/pull/7890 - https://github.com/swc-project/swc/pull/7876 - https://github.com/swc-project/swc/pull/7858 - https://github.com/swc-project/swc/pull/7856 - https://github.com/swc-project/swc/pull/7853 - https://github.com/swc-project/swc/pull/7832
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