Parsing error when using variable `of`

[errorx666]

Acknowledgements

• [X] I read the documentation and searched existing issues to avoid duplicates
• [X] I am reporting a confirmed bug (not seek debugging help)
• [X] I understand this is a collaborative project and relies on my contributions
• [X] I read and understood the Contribution guide

Minimal reproduction URL

https://stackblitz.com/edit/stackblitz-starters-gtalwu?file=tsconfig.json

Problem & expected behavior (under 200 words)

npm start

Expected: code runs Actual: Parse error

Works with bun

Bugs are expected to be fixed by those affected by it

• [x] I'm interested in working on this issue

Compensating engineering work financially will speed up resolution

• [ ] I'm willing to offer financial support

[errorx666]

I started with a real-world error and stripped out as much as possible while still preserving the error.

[privatenumber]

I appreciate the effort but the reproduction is not minimal at all... There's 7 files and 11 dependencies. Please minimize it so tsx is the only dependency.

[errorx666]

@privatenumber I have reduced it to one file and one external dependency. Please check again.

[privatenumber]

Thanks, I appreciate it!

I believe the root problem is in es-module-lexer assuming of is a reserved identifier. I reported it here: https://github.com/guybedford/es-module-lexer/issues/173

I also noticed an opportunity to skip the parsing completely in your case as the parsing is only used to detect dynamic imports, which you're not using. Upgrading to tsx v4.10.3 should fix your use-case.

[errorx666]

Thank you for the quick turnaround! I would never have thought of that.

[privatenumber]

Fixed in https://github.com/guybedford/es-module-lexer/issues/173

[privatenumber]

:tada: This issue has been resolved in v4.10.5

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