let default results in keyword let being reported as reserved

[robertrossmann]

The following code:

espree.parse('let default = true', { ecmaVersion: 6, sourceType: 'module' })

Results in the following error: SyntaxError: The keyword 'let' is reserved

Expected behaviour: I would have expected to see the default being reported as reserved keyword, not let.

When sourceType: 'script' or when I use const or var instead of let, the error seems to match my expectations by reporting the following: SyntaxError: Unexpected token default

[ilyavolodin]

What version of Espree are you using? This has been fixed a long time ago. Here's the related issue: #149

[not-an-aardvark]

@ilyavolodin I think #149 might be a different issue. let default = 0 is invalid syntax -- the issue here is that the error message is wrong (it complains about let instead of default).

[robertrossmann]

I have 3.3.2 installed. Looks like that's the latest.

[ilyavolodin]

Ah, sorry, @not-an-aardvark is correct. I misread the issue. I think this would be an issue upstream in Acorn.
Edit: Verified in https://astexplorer.net/ that it's an issue with Acorn. Esprima handles this issue correctly. @Alaneor could you file an issue in https://github.com/ternjs/acorn repository for this?

[robertrossmann]

Opened a new issue in Acorn repo: acornjs/acorn#544 🎉

Feel free to close this unless you would like to keep track of this. Thanks!

[kaicataldo]

Closing this as it looks like this was fixed upstream.