Runtime error in production build of ReasonML app

[alex35mil]

🐛 bug report

After bump from 1.8.1 to 1.9.3 I receive runtime errors in Reason app in production build only.

🎛 Configuration (.babelrc, package.json, cli command)

package.json: https://github.com/alexfedoseev/re-formality/blob/bump-parcel/package.json
bsconfig.json: https://github.com/alexfedoseev/re-formality/blob/bump-parcel/bsconfig.json
No babel.

🤔 Expected Behavior

No runtime errors.

😯 Current Behavior

Uncaught TypeError: Cannot read property 'ReactCurrentOwner' of undefined
    at Object.parcelRequire.38.fbjs/lib/invariant (examples.19edb846.js:109)
    at u (examples.19edb846.js:1)
    at p (examples.19edb846.js:1)
    at Object.parcelRequire.34../cjs/react-dom.production.min.js (examples.19edb846.js:111)
    at u (examples.19edb846.js:1)
    at p (examples.19edb846.js:1)
    at Object.parcelRequire.32../Formality__Validation.bs.js (examples.19edb846.js:83)
    at u (examples.19edb846.js:1)
    at p (examples.19edb846.js:1)
    at Object.parcelRequire.10.re-classnames/src/Cn.bs.js (examples.19edb846.js:87)

💁 Possible Solution

None.

🔦 Context

How to reproduce:

1. Clone https://github.com/alexfedoseev/re-formality/
2. Switch to bump-parcel branch
3. Run yarn run build
4. Open dist/index.html in browser (w/o server need to add ./ prefixes to assets paths)

💻 Code Sample

https://github.com/alexfedoseev/re-formality/tree/bump-parcel

🌍 Your Environment

| Software         | Version(s) |
| ---------------- | ---------- |
| Parcel           | 1.9.1
| Node             | 10.1.0
| npm/Yarn         | 1.6.0
| Operating System | macOS 10.13.5

[safareli]

looks like it's same issue as #1656

[justinwoo]

Almost identical issue for me with 1.9.7

[safareli]

If you don't the issue with --no-minify than it might be issue with default ugglify options.

[alex35mil]

Fixed for me.