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.

[rpedroni]

Having same issue with email validation with "yup": "^0.32.9"
Turning off swcMinify for now while stability pending

[Aliemeka]

I think setting swcMinify: false solves the issue for me. However, there needs to be support for yup version ^0.32.11 validations.

[egaba]

Having a similar issue using v12.0.3 and yup. Going to turn off swcMinify for now.

[nikosantis]

Same issue with Nextjs v12.0.3 and yup 0.32.11.

ReferenceError: excludeEmptyString is not defined
    at yc.matches (545-7eafa77df153ad02.js:1)
    at yc.email (545-7eafa77df153ad02.js:1)
    at Object.7669 (index-5f41350bcbc82045.js:1)
    at g (webpack-2bbe73903b6b5b3e.js:1)
    at index-5f41350bcbc82045.js:1
    at main-5a40b9d72bc92c69.js:1

[kdy1]

I think this is fixed by #31242

[neilpoulin]

I think this is fixed by #31242

Great! I'll test it once that commit gets released.

[timneutkens]

@neilpoulin you can try it using npm install next@canary 👍

[rodilo]

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

Did you find what was causing your issue? I get the same when I enable swcMinify.

[Aliemeka]

Hey @rodilo!

Yeah, I get that too. If it's yup your using, it seems the swc compiler is incompatible with yup version >0.32.10. You can use a lower version like yup version ^0.32.9 or set swcMinify: false

I also think there is a canary version of Next 12 that addresses this issue. You can use install next@canary and redeploy to production.

[rodilo]

Hey @rodilo!

Yeah, I get that too. If it's yup your using, it seems the swc compiler is incompatible with yup version >0.32.10. You can use a lower version like yup version ^0.32.9 or set swcMinify: false

I also think there is a canary version of Next 12 that addresses this issue. You can use install next@canary and redeploy to production.

I've found what was causing mine, it's ajv. So I'll try to upgrade to the latest version, and see if the error still occurs.

[rodilo]

Yeah, I get the same error with the canary version as well.
Error is thrown from within ajv library we use for validation.

[BluetyIt]

I got same error while using next^12.0.2
Fixed while upgrade to next^12.0.4

[timneutkens]

The issue with yup has been fixed on the latest stable as @BluetyIt mentioned.

[balazsorban44]

This issue has been automatically locked due to no recent activity. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.