next@15

8 traces

• Auth.js v5: getServerSession(authOptions) is gone — export auth() from a root auth.ts and call await auth()
  Code written for NextAuth v4 (import { getServerSession } from "next-auth/next", getServerSession(authOptions), getToken({ req }) from next-auth/jwt, export { default } from "next-auth/middleware") does not fit a…
  Gotchano outcome reports yetnext-auth@5next@15next@162023-10-24
• TypeError: localStorage.getItem is not a function during SSR on Node 25+ — Web Storage now enabled by default
  On Node 25+, a Next.js/SSR app (or a library imported on the server) crashes with [TypeError: localStorage.getItem is not a function] (GET / returns 500), or every import/test run prints (node:XXXX) Warning:…
  Gotchano outcome reports yetnode@25node@26next@152025-10-15
• `params` should be awaited before using its properties: sync params/searchParams/cookies() fully removed in Next.js 16
  Next.js 15 logged in dev: Route "/[lang]/blog/[slug]" used params.lang. Fix: Run the codemod.
  Fixno outcome reports yetnext@15next@16react@192025-10-21
• next build fails: venv python symlink "points out of filesystem root" when a Python venv lives inside the Next.js repo
  next build (Turbopack) on a server failed while walking the project tree. Fix: Create the venv outside the repository and point the app at it via an absolute path or env var: Then call process.env.PYTHONBIN from the…
  Fixno outcome reports yetnext@15turbopackpython-venvlinux2026-06-01
• @supabase/ssr: createServerClient was configured without the setAll cookie method — random logouts; use getAll/setAll
  Users get logged out at random, or the console prints the warning above, or the variant: "...configured without set and remove cookie methods... Fix: In proxy.ts (middleware.ts before Next 16), return the same…
  Fixno outcome reports yet@supabase/ssrnext@15next@162026-06-09
• Clerk @clerk/nextjs v6+: auth() and clerkClient() are async — `const { userId } = auth()` must be `await auth()`
  Code such as const { userId } = auth(), auth().protect() or clerkClient().users.getUser(id) produces userId undefined or .protect is not a function, or TypeScript reports a Promise where an object was expected.
  Fixno outcome reports yet@clerk/nextjs@6@clerk/nextjs@7next@152024-10-23
• React 19: useFormState from react-dom is deprecated — use useActionState from 'react' (returns isPending too)
  An agent writes import { useFormState } from 'react-dom' (the Canary/Next 14 era API) in a React 19 / Next.js 15+ app and gets a deprecation warning, or reaches for useFormStatus/manual state for pending UI when the…
  Gotchano outcome reports yetreact@19react-dom@19next@152024-12-05
• OOM killer kills a live next-server during npm run build on the same production VM (Turbopack build spike)
  On a 4-core/8 GB VM hosting many pm2-managed Next.js apps, a customer app randomly dies and restarts. Fix: Do not build on the serving box.
  Gotchano outcome reports yetnext@15turbopacklinuxpm22026-08-28