Server action causes TypeError when returning a value

[grzegorzpokorski]

Link to the code that reproduces this issue

https://github.com/grzegorzpokorski/next-server-action-return-type

To Reproduce

1. Clone reproduction repo: https://github.com/grzegorzpokorski/next-server-action-return-type
2. Download deps and build project (pnpm i && pnpm build).
3. During build you should recieve folowing type error:

./app/page.tsx:17:16
Type error: Type '(formData: FormData) => Promise<{ data: string; }>' is not assignable to type 'string | ((formData: FormData) => void | Promise<void>)'.
  Type '(formData: FormData) => Promise<{ data: string; }>' is not assignable to type '(formData: FormData) => void | Promise<void>'.
    Type 'Promise<{ data: string; }>' is not assignable to type 'void | Promise<void>'.
      Type 'Promise<{ data: string; }>' is not assignable to type 'Promise<void>'.
        Type '{ data: string; }' is not assignable to type 'void'.

  15 |   }
  16 |  
> 17 |   return <form action={createInvoice}>...</form>
     |                ^
  18 | }
   Linting and checking validity of types  ... ELIFECYCLE  Command failed with exit code 1.

Current vs. Expected behavior

Allow data to be returned from server action.

Provide environment information

Operating System:
  Platform: linux
  Arch: x64
  Version: #1 SMP Fri Mar 29 23:14:13 UTC 2024
  Available memory (MB): 7843
  Available CPU cores: 8
Binaries:
  Node: 20.16.0
  npm: 10.8.1
  Yarn: 1.22.22
  pnpm: 9.11.0
Relevant Packages:
  next: 15.0.0-canary.173 // Latest available version is detected (15.0.0-canary.173).
  eslint-config-next: N/A
  react: 19.0.0-rc-3edc000d-20240926
  react-dom: 19.0.0-rc-3edc000d-20240926
  typescript: 5.3.3
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

TypeScript

Which stage(s) are affected? (Select all that apply)

next build (local)

Additional context

The mentioned type error occurs after upgrading @types/react to version 18.3.9 and later.
Example server action comes from documentation: https://nextjs.org/docs/app/building-your-application/data-fetching/server-actions-and-mutations#forms