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Deployment Vercel Updated May 22, 2026

Vercel Build Hanging After Completion When Builders Leave Active Event-Loop Handles

Fix Vercel CLI hanging builds by detecting leaked timer handles and orphan processes after build() returns, exiting immediately instead of hanging forever Includes evidence for Vercel troubleshooting demand.

vercel build hangs after completion when builders leave active event-loop handles (leaked Timeout handles / orphan child processes); CLI exits indefinitely instead of failing fast
Deployment Vercel Updated May 22, 2026

Next.js sitemap.xml Build Fails with Turbopack Parallel Prerender Race Condition

Fix Next.js 16.2.0 regression causing sitemap.xml builds to fail when using force-static dynamic routing on Vercel; local next build succeeds but cloud deployment fails Includes evidence for Vercel troubleshooting demand.

Error: Invariant: failed to find source route /[store]/[lang]/c/sitemap.xml for prerender /[store]/[lang]/c/sitemap.xml — only reproducible on Vercel remote builder with Turbopack parallel workers
Deployment Vercel Updated May 22, 2026

Vercel CLI 54.2.0 Breaks SvelteKit Route Resolution Producing 404 Errors

Fix Vercel CLI 54.2.0 regression where SvelteKit app deploys successfully but all admin/* routes silently fall through to 404 error page in production Includes evidence for Vercel troubleshooting demand.

Vercel CLI 54.2.0 causes SvelteKit nested /admin/* routes to render root +error.svelte (404 page) instead of correct page; build output shows all routes present but runtime matches wrong pattern
Deployment Vercel Updated May 22, 2026

Vercel Edge Function Timeout in Next.js Build Deployment

Resolve Vercel function invocation timeout errors preventing Next.js production deployments Includes evidence for Vercel troubleshooting demand.

Vercel ERROR Function timed out after 15s (FUNCTION_INVOCATION_TIMEOUT) during Next.js edge build
Deployment Vercel Updated May 22, 2026

Module Not Found: Case-Sensitive Filesystem Breaking Vercel Deployments

Fix Vercel deployment failures caused by macOS/Windows case-insensitive filesystem masking import path casing mismatches that fail on Vercel's Linux environment Includes evidence for Vercel troubleshooting demand.

Module not found — Can't resolve './Components/Header' (import path casing mismatch)
Deployment Vercel Updated May 21, 2026

Turbopack Worker URL crash in Next.js 16.2 production builds causes Monaco editor failure

Fix regression in Next.js 16.2 Turbopack where Web Worker instantiation via import.meta.url crashes in production, breaking language-service workers Includes evidence for Vercel troubleshooting demand.

Turbopack production build: e.indexOf is not a function → TypeError: Cannot read properties of undefined (reading 'toUrl') when Web Worker created via new URL(..., import.meta.url)
Deployment Vercel Updated May 21, 2026

Vercel Build Failed due to Webpack Errors in Production Deployments

Resolve Vercel deployment failures caused by webpack build errors and missing modules in production builds Includes evidence for Vercel troubleshooting demand.

Build failed because of webpack errors / Deployment Failed with error Module not found
Deployment Vercel Updated May 21, 2026

Vercel CLI 54.2.0 breaks SvelteKit route resolution for /admin/* paths

Developer upgrades Vercel CLI and discovers SvelteKit admin routes stop working — routing table changed between CLI versions causing deployment failures Includes evidence for Vercel troubleshooting demand.

CLI 54.2.0 breaks SvelteKit route resolution for /admin/* routes
Deployment Vercel Updated May 21, 2026

Vercel static-build production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan

Developer deploying Vite app to Vercel finds production build incorrectly has import.meta.env.DEV=true instead of false — causes dev-only code to ship to production Includes evidence for Vercel troubleshooting demand.

Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0)
Deployment Vercel Updated May 21, 2026

Vercel build ERR_MODULE_NOT_FOUND at runtime: Cannot find module after deployment

Fix Vercel deployment runtime error where deployed bundles reference missing modules causing 500 Internal Server Error after successful build Includes evidence for Vercel troubleshooting demand.

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/var/task/apps/remix/build/...' imported from /var/task/...
Deployment Vercel / Next.js Updated May 21, 2026

Next.js Turbopack crashes in pages/_app.tsx when next/font is imported

Fix Turbopack runtime crash triggered by importing next/font in _app.tsx — breaking font optimization for Pages Router projects migrating to or using Turbopack on Vercel Includes evidence for Vercel / Next.js troubleshooting demand.

Turbopack crashes in pages/_app.tsx when next/font is imported
Deployment Vercel / Next.js Updated May 21, 2026

Turbopack build fails 'Failed to collect page data' on CMS-fed sitemap.xml

Fix Next.js Turbopack build failure specifically affecting CMS-driven sites generating dynamic sitemaps — common pattern for marketing/content businesses deploying on Vercel Includes evidence for Vercel / Next.js troubleshooting demand.

Turbopack build fails 'Failed to collect page data' on CMS-fed sitemap.xml
Deployment Vercel Updated May 20, 2026

Vercel Build Command Exited with Code 127 — Missing Dependency

在 Vercel 部署 Next.js 应用时构建命令退出码 127,表示命令未找到(如 bun、node_modules 未安装),用户需要排查具体缺失的依赖 Includes evidence for Vercel troubleshooting demand.

Error: Command "build" exited with 127
Deployment Vercel Updated May 20, 2026

Next.js standalone output folder missing all sourcemaps breaks production debugging

Fix Next.js standalone mode output to include sourcemaps so production deployments retain ability to debug minified code in browser DevTools Includes evidence for Vercel troubleshooting demand.

The .next/standalone/ output folder doesn't contain any sourcemaps — production deployments via standalone mode have zero debuggability
Deployment Vercel Updated May 20, 2026

Vercel/Next.js Turbopack generates external module references with hashes that don't match installed packages

Fix Turbopack hash generation mismatch between build-time module references and runtime installed packages in monorepo or custom node_modules setups Includes evidence for Vercel troubleshooting demand.

Turbopack generates external module references with hashes that don't match installed packages when node_modules structure differs — build succeeds but runtime fails with module resolution errors