[SourceMap] `prepareStackTrace` patch minifies server stack trace

Link to the code that reproduces this issue

https://github.com/troyt-42/nextjs-source-map

To Reproduce

1. Checkout https://github.com/troyt-42/nextjs-source-map
2. Install dependencies
3. Generate a production build: yarn build
4. Start the server with source map enabled: NODE_OPTIONS=--enable-source-maps yarn start
5. Access localhost:3000

Current vs. Expected behavior

Current:
The manual log's stack trace is minified even we have the page.js.map file generated

Where am I: Error: 
    at i (.../nextjs-source-map/.next/server/app/page.js:1:31591)
    at ek (.../nextjs-source-map/node_modules/next/dist/compiled/next-server/app-page.runtime.prod.js:84:13368)
    at e (.../nextjs-source-map/node_modules/next/dist/compiled/next-server/app-page.runtime.prod.js:84:17266)
    at e$ (.../nextjs-source-map/node_modules/next/dist/compiled/next-server/app-page.runtime.prod.js:84:17728)
    at Array.toJSON (.../nextjs-source-map/node_modules/next/dist/compiled/next-server/app-page.runtime.prod.js:84:14874)
    at stringify (<anonymous>)
    at eU (.../nextjs-source-map/node_modules/next/dist/compiled/next-server/app-page.runtime.prod.js:84:26231)
    at eB (.../nextjs-source-map/node_modules/next/dist/compiled/next-server/app-page.runtime.prod.js:84:26461)
    at eq (.../nextjs-source-map/node_modules/next/dist/compiled/next-server/app-page.runtime.prod.js:84:27015)
    at AsyncLocalStorage.run (node:async_hooks:346:14)

Expected:
After commenting out this line: https://github.com/vercel/next.js/blob/8ffa6c74b1f3fe357ce25bb455a565c6327dbd1e/packages/next/src/server/patch-error-inspect.ts#L373, I can see the source-mapped stack trace

Where am I: Error
    at i (webpack://nextjs-source-map/src/app/page.tsx:4:30)
    at renderFunctionComponent (webpack://next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.production.js:1006:15)
    at renderElement (webpack://next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.production.js:1082:12)
    at renderModelDestructive (webpack://next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.production.js:1121:1)
    at Array.toJSON (webpack://next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.production.js:1156:40)
    at stringify (<anonymous>)
    at emitChunk (webpack://next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.production.js:1734:43)
    at retryTask (webpack://next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.production.js:1755:11)
    at eq (webpack://next/dist/compiled/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.production.js:1803:7)
    at AsyncLocalStorage.run (node:async_hooks:346:14)

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 23.6.0: Wed Jul 31 20:48:04 PDT 2024; root:xnu-10063.141.1.700.5~1/RELEASE_ARM64_T6030
  Available memory (MB): 36864
  Available CPU cores: 12
Binaries:
  Node: 20.12.2
  npm: 10.8.1
  Yarn: 1.22.22
  pnpm: 9.15.3
Relevant Packages:
  next: 15.1.3
  eslint-config-next: 15.1.3
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.7.2
Next.js Config:
  output: N/A

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

Runtime

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

next start (local)

Additional context

After reviewing patch-error-inspect.ts, it seems intentional that prepareStackTrace prevents error.stack from being source-mapped. If this is the intended behavior, there may be an issue in the downstream code.

This behavior is causing maintenance challenges for Faire after upgrading to Next.js version 15.1.3. Having source-mapped stack traces is critical for efficient debugging, and the absence of this feature significantly hinders our ability to troubleshoot issues.

Start with packages/next/src/server/patch-error-inspect.ts, especially the prepareStackTrace code around line 373, then reproduce the behavior using the linked nextjs-source-map project with yarn build and NODE_OPTIONS=--enable-source-maps yarn start. Done means determining why next start returns minified server stack traces despite page.js.map and preserving the expected source-mapped output without breaking the intended stack inspection behavior.