For of loop in generator function lead to compilation error with [email protected]

[phahn]

Is this a bug report?

Yes

Did you try recovering your dependencies?

Yes

Which terms did you search for in User Guide?

generator

Environment

1. node -v: v8.1.3
2. npm -v: 5.8.0
3. yarn --version (if you use Yarn): 1.6.0
4. npm ls react-scripts (if you haven’t ejected): [email protected]

Then, specify:

1. Operating system: MacOs High Sierra
2. Browser and version (if relevant):

Steps to Reproduce

1. Create a new project create-react-app test
2. Update dependency to [email protected]
3. Add function* test() { for (let num of [1,2,3]) { yield console.log("test"); } }
   to index.js
4. yarn install
5. yarn start, add default target browser

Expected Behavior

In [email protected] this shows a running page.

Actual Behavior

With [email protected] it fails to compile: ./src/index.js
Module build failed: Error: unknown Statement of type "ForOfStatement"
at Array.forEach (native)

Reproducible Demo

[francisu]

I can reproduce this with the above steps. See also: #4627

[conartist6]

Yep. I have a PR out to fix it too. #4630 Just rebased it to resolve conflicts. I imagine it's the kind of thing that will be addressed once CI is unbroken.

[Timer]

Fixed in #4630