next.js

090f1b72 - fix: suppress missing package manager errors in next info (#97946)

fix: suppress missing package manager errors in next info (#97946) ## What - capture stdout and stderr for both direct and shell-fallback package-manager version probes - keep successful version output unchanged and return `N/A` when a probe fails - add deterministic cross-platform regression coverage with a failing Yarn shim Closes #97932 ## Why PR #71134 added an `execSync` fallback so package-manager command shims can be resolved on Windows. When `stdio` is omitted, Node mirrors stderr from failed synchronous child processes to the parent, so an unavailable Yarn or pnpm can print raw shell errors before `next info` reports `N/A`. Passing `{ stdio: "pipe" }` to both probes preserves captured stdout and the Windows fallback while keeping expected probe failures silent. The change stays scoped to package-manager version detection; shared registry discovery is unchanged. ## Testing - `pnpm --filter next typescript` - `pnpm --filter next build` - `pnpm test-types --pretty false` - ESLint and Prettier on both changed files - `pnpm test-start test/e2e/cli/cli.test.ts` (66 passed, 1 skipped) - built-CLI reproduction with npm available and Yarn/pnpm absent: both report `N/A` with no Yarn/pnpm command-not-found output - autoreview with GPT-5.6 Sol xhigh and Claude Opus 5 xhigh: zero findings --------- Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>