NextJS getServerSideProps causes ant-design's FormItemLabel component to crash

Reproduction link

https://github.com/fasfoxcom/pnpm-next-antd

Steps to reproduce

1. Make sure getServerSideProps is present on the page
2. Install dependencies pnpm install
3. Run pnpm build
4. Run pnpm start
5. Access the page at http://localhost:3000/
6. Crash

The culprit is this bit of code down here:

export async function getServerSideProps() {
  return {
    props: {},
  };
}

Removing getServerSideProps stops the crashing

What is expected?

We should be able to build and run our Next app without a crash when getServerSideProps is present

What is actually happening?

When we run pnpm start and attempt to access the page after building the project successfully with pnpm build we get a crash and the following error following error:

TypeError: Cannot read properties of undefined (reading 'vertical')
    at Object.children (/.../pnpm-antd-next-bug/node_modules/.pnpm/antd@4.20.4_sfoxds7t5ydpegc3knd667wn6m/node_modules/antd/lib/form/FormItemLabel.js:88:26)
    at a.b.render (/.../pnpm-antd-next-bug/node_modules/.pnpm/react-dom@17.0.2_react@17.0.2/node_modules/react-dom/cjs/react-dom-server.node.production.min.js:44:213)
    at a.b.read (/.../pnpm-antd-next-bug/node_modules/.pnpm/react-dom@17.0.2_react@17.0.2/node_modules/react-dom/cjs/react-dom-server.node.production.min.js:41:83)
    at Object.exports.renderToString (/.../pnpm-antd-next-bug/node_modules/.pnpm/react-dom@17.0.2_react@17.0.2/node_modules/react-dom/cjs/react-dom-server.node.production.min.js:52:138)
    at Object.renderPage (/.../pnpm-antd-next-bug/node_modules/.pnpm/next@12.1.6_sfoxds7t5ydpegc3knd667wn6m/node_modules/next/dist/server/render.js:804:45)
    at Object.defaultGetInitialProps (/.../pnpm-antd-next-bug/node_modules/.pnpm/next@12.1.6_sfoxds7t5ydpegc3knd667wn6m/node_modules/next/dist/server/render.js:391:51)
    at Function.getInitialProps (/.../pnpm-antd-next-bug/.next/server/pages/_document.js:607:20)
    at Object.loadGetInitialProps (/.../pnpm-antd-next-bug/node_modules/.pnpm/next@12.1.6_sfoxds7t5ydpegc3knd667wn6m/node_modules/next/dist/shared/lib/utils.js:65:29)
    at documentInitialProps (/.../pnpm-antd-next-bug/node_modules/.pnpm/next@12.1.6_sfoxds7t5ydpegc3knd667wn6m/node_modules/next/dist/server/render.js:817:48)
    at renderDocument (/.../pnpm-antd-next-bug/node_modules/.pnpm/next@12.1.6_sfoxds7t5ydpegc3knd667wn6m/node_modules/next/dist/server/render.js:841:55)

Environment	Info
antd	4.20.4
React	17.0.2
System	Mac OS Version 12.3.1
Browser	Chrome Version 101.0.4951.54 (Official Build) (arm64)

---

Note that running pnpm dev does not crash when accessing the app.

[lerela]

If anyone encounters this issue, our diagnostic was wrong. This has nothing to do with PNPM, this is an incompatibility in Next 12.1.6 which got upgraded when we changed our package manager. Downgrading to Next 12.1.5 fixes it, and it also seems to be fixed in 12.1.7-canary.

[lerela]

Leaving out the label prop from Form.Item also prevents the crash from happening when accessing the page.