next.js: [NEXT-1092] `next build` compile error regarding export worker

Verify canary release

• I verified that the issue exists in the latest Next.js canary release

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 11 Pro
Binaries:
  Node: 18.16.0
  npm: 9.5.1
  Yarn: N/A
  pnpm: 8.4.0
Relevant packages:
  next: 13.4.1-canary.2
  eslint-config-next: N/A
  react: 18.2.0
  react-dom: 18.2.0

Which area(s) of Next.js are affected? (leave empty if unsure)

App directory (appDir: true), Package manager (npm, pnpm, Yarn), Static HTML Export (output: “export”)

Link to the code that reproduces this issue

https://github.com/Kazzuk/reproduce

To Reproduce

• Ensure output is set to “export” in next.config.js to cause error.
• Run pnpm build.

Describe the Bug

Whenever output is set to “export” in next.config.js and you build the project you will be met with the below error. If I was to remove output from next.config.js the project compiles fine. As well if remove the dynamic routes (delete blog folder) from the project while output is set to “export” the project compiles fine.

> Build error occurred
Error: invariant: Undefined export worker for app dir, this is a bug in Next.js.
    at C:\Users\Kazuk\Documents\GitHub\reproduce\node_modules\.pnpm\next@13.4.1-canary.2_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\export\index.js:506:27
    at Span.traceAsyncFn (C:\Users\Kazuk\Documents\GitHub\reproduce\node_modules\.pnpm\next@13.4.1-canary.2_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\trace\trace.js:103:26)
    at C:\Users\Kazuk\Documents\GitHub\reproduce\node_modules\.pnpm\next@13.4.1-canary.2_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\export\index.js:502:35
    at Array.map (<anonymous>)
    at C:\Users\Kazuk\Documents\GitHub\reproduce\node_modules\.pnpm\next@13.4.1-canary.2_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\export\index.js:499:41
    at async Span.traceAsyncFn (C:\Users\Kazuk\Documents\GitHub\reproduce\node_modules\.pnpm\next@13.4.1-canary.2_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\trace\trace.js:103:20)    
    at async C:\Users\Kazuk\Documents\GitHub\reproduce\node_modules\.pnpm\next@13.4.1-canary.2_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\build\index.js:1887:17
    at async Span.traceAsyncFn (C:\Users\Kazuk\Documents\GitHub\reproduce\node_modules\.pnpm\next@13.4.1-canary.2_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\trace\trace.js:103:20)    
    at async build (C:\Users\Kazuk\Documents\GitHub\reproduce\node_modules\.pnpm\next@13.4.1-canary.2_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\build\index.js:143:29)

Expected Behavior

Build should be successful.

Which browser are you using? (if relevant)

No response

How are you deploying your application? (if relevant)

No response

_{From SyncLinear.com | NEXT-1092}