swcMinify: true - ReferenceError: Can't find variable: excludeEmptyString

[JClackett]

What version of Next.js are you using?

12.0.1

What version of Node.js are you using?

16.10.0

What browser are you using?

Safari

What operating system are you using?

MacOS

How are you deploying your application?

Vercel

Describe the Bug

I'm sure its connected to other issues, but thought I'd provide some more context.

Setting the swcMinify config to true seems to break something in the runtime as it successfully builds and deploys, but then when navigating to certain pages I get:

ReferenceError: Can't find variable: excludeEmptyString 
  matches — string.js:75
  (anonymous function) — <some-page>.tsx:33
  g — bootstrap:22
  (anonymous function) — _N_E:6
  promiseReactionJob

Expected Behavior

Not error :)

To Reproduce

Our team has a boilerplate repo we use on all our projects:

https://github.com/NoQuarterTeam/boilerplate

• cd into packages/web
• change the next.config.js file to set swcMinify to true
• yarn build
• yarn start
• Navigate to /login

[mr47]

@JClackett it's yup package, maybe you have some custom validations.

[JClackett]

@JClackett it's yup package, maybe you have some custom validations.

Yeah I do! is this documented as to why this wouldn't work with swc minification? and if there's a fix?

Example yup code:

import * as Yup from "yup"

Yup.addMethod(Yup.string, "nullIfEmpty", function () {
  return this.transform((val, origVal) => (origVal.trim() === "" ? null : val)).nullable()
})

Yup.addMethod(Yup.number, "nullIfEmpty", function () {
  return this.transform((val, origVal) => (origVal === "" ? null : val)).nullable()
})
export default Yup

[ScottEAdams]

We have come across a similar issue with yup email:
Yup.string().email(t('validEmail')).required(t('required'))

ReferenceError: excludeEmptyString is not defined
at Ec.matches
at Ec.email

[jamesbluecrow]

I'm seeing a similar issue when swcMinify: true, the error I see is:

NextJS Version 12.0.2

Uncaught SyntaxError: Missing initializer in const declaration

[MohammedWaheeb]

same issue here with 12.0.1 and yup 0.32.9 swcMinify: true

[neilpoulin]

This is related to my issue posted here: #30498

[mntnv]

I'm having the same issue with yup v0.32.9 and the same behavior with the latest version.

for me, a temporary downgrade to yup v0.31.1 helped to fix ReferenceError: Can't find variable: excludeEmptyString

On the next.js v12 with enabled swcMinify.