Can't parse es2017 and later

[falsandtru]

Acorn targets es2016 by default, not es2017 or later. You have to specify the version.

https://github.com/acornjs/acorn#main-parser

[twada]

@falsandtru Sorry for my late response. I'll take a look.

To give you a quick fix, could you tell me what transpiler-side product are you using?

• unassertify
• babel-plugin-unassert
• webpack-unassert-loader
• gulp-unassert
• unassert-cli

I'll fix it first.

[falsandtru]

I'm using gulp-unassert.

[twada]

While tackling with this issue, I've found that escodegen cannot generate for-await-of statement so I made a PR to fix. Please wait for a moment.

refs: Support async iteration statement for-await-of introduced in ES2018

[falsandtru]

Now gulp-unassert can work with es2018, thanks!