build process hang with ts 3.9

[Innei]

Bug report

I upgrade typescript 3.8 to 3.9.x, and I run next build, but hang with the message. Creating an optimized production build .. After a long wait, but hang. No other hints.

Describe the bug

Can't build production with typescript 3.9.x, build process hang.

To Reproduce

I don't kwon how to reproduce, My node version is node v12.16.3, next version is 9.4.1, os mac 10.14.2

and this is my next.config.js

const isProd = process.env.NODE_ENV === 'production'
const withBundleAnalyzer = require('@next/bundle-analyzer')({
  enabled: process.env.ANALYZE === 'true',
})
const env = require('dotenv').config().parsed || {}
const withImages = require('next-images')
module.exports = withImages(
  withBundleAnalyzer({
    env: {
      PORT: 2323,
      ...env,
    },
    assetPrefix: isProd ? env.ASSETPREFIX || '' : '',
    experimental: {
      modern: true,
      async rewrites() {
        return [{ source: '/sitemap.xml', destination: '/api/sitemap' }]
      },
      catchAllRouting: true,
    },
  }),
)

Expected behavior

build success, not hang.

Screenshots

this is all output of the build process.

17:19:28 › yarn build                       
yarn run v1.22.4
$ cross-env NODE_ENV=production next build
info  - Loaded env from .env
warn  - You have enabled experimental feature(s).
warn  - Experimental features are not covered by semver, and may cause unexpected or broken application behavior. Use them at your own risk.

> Using external babel configuration
> Location: "/Users/innei/GitHub/mx-web/.babelrc"
Creating an optimized production build ..

System information

My node version is node v12.16.3, next version is 9.4.1, os mac 10.15.2

[Innei]

okay, it solved in the latest nextjs version.

[balazsorban44]

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