bug: session type issue on NextJs 12.3.0

[zunnur-trinovik]

Provide environment information

System:
OS: Windows 10 10.0.22000
CPU: (16) x64 12th Gen Intel(R) Core(TM) i5-1240P
Memory: 1.77 GB / 15.69 GB
Binaries:
Node: 16.15.1 - C:\Program Files\nodejs\node.EXE
npm: 8.19.1 - C:\Program Files\nodejs\npm.CMD

Describe the bug

session not longer work and show error Property 'session' does not exist on type '{}' on file _app.tsx. " after updating the nextjs from 12.2.5 to 12.3.

To reproduce

run npm i next@latest which will update the next package to 12.3.0

Additional information

Here what I found that have been changed in utils.d.ts.

pageProps before update:
export declare type AppInitialProps = { pageProps: any; };

pageProps after update:
export declare type AppInitialProps<P = any> = { pageProps: P; };

[nexxeln]

Yup I noticed this in the new next js version. I think they changed their AppType.

[juliusmarminge]

Don't think this is on us just yet (we don't install Next 12.3 for you)

I pulled an issue on Next.js so we'll see what thry say first: vercel/next.js#40371

[balazsorban44]

For context, AppType hasn't officially been exported, so this was not a bug, but I opened a PR to properly expose it and fix the underlying issue at the same time. You can follow: vercel/next.js#40391

[leerob]

Thanks for raising this! And thank you @balazsorban44 for the quick PR.

[juliusmarminge]

vercel/next.js#40391 just got merged so I think we can close this one and just hold off with updating until Next 12.3.1 comes out 👍🏼