Ensure error is passed up in minimal mode

packages/next/next-server/server/next-server.ts

@@ -184,7 +184,7 @@ export default class Server {
     this.nextConfig = loadConfig(phase, this.dir, conf)
     this.distDir = join(this.dir, this.nextConfig.distDir)
     this.publicDir = join(this.dir, CLIENT_PUBLIC_FILES_PATH)
-    this.hasStaticDir = fs.existsSync(join(this.dir, 'static'))
+    this.hasStaticDir = !minimalMode && fs.existsSync(join(this.dir, 'static'))
 
     // Only serverRuntimeConfig needs the default
     // publicRuntimeConfig gets it's default in client/index.js
@@ -567,6 +567,9 @@ export default class Server {
     try {
       return await this.run(req, res, parsedUrl)
     } catch (err) {
+      if (this.minimalMode) {
+        throw err
+      }
       this.logError(err)
       res.statusCode = 500
       res.end('Internal Server Error')
@@ -1835,14 +1838,19 @@ export default class Server {
         }
       }
     } catch (err) {
-      this.logError(err)
-
       if (err && err.code === 'DECODE_FAILED') {
+        this.logError(err)
         res.statusCode = 400
         return await this.renderErrorToHTML(err, req, res, pathname, query)
       }
       res.statusCode = 500
-      return await this.renderErrorToHTML(err, req, res, pathname, query)
+      const html = await this.renderErrorToHTML(err, req, res, pathname, query)
+
+      if (this.minimalMode) {
+        throw err
+      }
+      this.logError(err)
+      return html
     }
     res.statusCode = 404
     return await this.renderErrorToHTML(null, req, res, pathname, query)
@@ -1863,6 +1871,10 @@ export default class Server {
       )
     }
     const html = await this.renderErrorToHTML(err, req, res, pathname, query)
+
+    if (this.minimalMode && res.statusCode === 500) {
+      throw err
+    }
     if (html === null) {
       return
     }
@@ -2007,9 +2019,11 @@ export default class Server {
     }
 
     let nextFilesStatic: string[] = []
-    nextFilesStatic = recursiveReadDirSync(
-      join(this.distDir, 'static')
-    ).map((f) => join('.', relative(this.dir, this.distDir), 'static', f))
+    nextFilesStatic = !this.minimalMode
+      ? recursiveReadDirSync(join(this.distDir, 'static')).map((f) =>
+          join('.', relative(this.dir, this.distDir), 'static', f)
+        )
+      : []
 
     return (this._validFilesystemPathSet = new Set<string>([
       ...nextFilesStatic,

test/integration/required-server-files/pages/errors/gip.js

@@ -0,0 +1,14 @@
+function Page(props) {
+  return <p>here comes an error</p>
+}
+
+Page.getInitialProps = ({ query }) => {
+  if (query.crash) {
+    throw new Error('gip hit an oops')
+  }
+  return {
+    hello: 'world',
+  }
+}
+
+export default Page

test/integration/required-server-files/pages/errors/gsp/[post].js

@@ -0,0 +1,28 @@
+import { useRouter } from 'next/router'
+
+function Page(props) {
+  if (useRouter().isFallback) {
+    return <p>loading...</p>
+  }
+  return <p>here comes an error</p>
+}
+
+export const getStaticPaths = () => {
+  return {
+    paths: [],
+    fallback: true,
+  }
+}
+
+export const getStaticProps = ({ params }) => {
+  if (params.post === 'crash') {
+    throw new Error('gsp hit an oops')
+  }
+  return {
+    props: {
+      hello: 'world',
+    },
+  }
+}
+
+export default Page

test/integration/required-server-files/pages/errors/gssp.js

@@ -0,0 +1,16 @@
+function Page(props) {
+  return <p>here comes an error</p>
+}
+
+export const getServerSideProps = ({ query }) => {
+  if (query.crash) {
+    throw new Error('gssp hit an oops')
+  }
+  return {
+    props: {
+      hello: 'world',
+    },
+  }
+}
+
+export default Page

test/integration/required-server-files/test/index.test.js

@@ -20,6 +20,7 @@ let nextApp
 let appPort
 let buildId
 let requiredFilesManifest
+let errors = []
 
 describe('Required Server Files', () => {
   beforeAll(async () => {
@@ -58,7 +59,8 @@ describe('Required Server Files', () => {
       try {
         await nextApp.getRequestHandler()(req, res)
       } catch (err) {
-        console.error(err)
+        console.error('top-level', err)
+        errors.push(err)
         res.statusCode = 500
         res.end('error')
       }
@@ -419,4 +421,31 @@ describe('Required Server Files', () => {
       path: ['hello', 'world'],
     })
   })
+
+  it('should bubble error correctly for gip page', async () => {
+    errors = []
+    const res = await fetchViaHTTP(appPort, '/errors/gip', { crash: '1' })
+    expect(res.status).toBe(500)
+    expect(await res.text()).toBe('error')
+    expect(errors.length).toBe(1)
+    expect(errors[0].message).toContain('gip hit an oops')
+  })
+
+  it('should bubble error correctly for gssp page', async () => {
+    errors = []
+    const res = await fetchViaHTTP(appPort, '/errors/gssp', { crash: '1' })
+    expect(res.status).toBe(500)
+    expect(await res.text()).toBe('error')
+    expect(errors.length).toBe(1)
+    expect(errors[0].message).toContain('gssp hit an oops')
+  })
+
+  it('should bubble error correctly for gsp page', async () => {
+    errors = []
+    const res = await fetchViaHTTP(appPort, '/errors/gsp/crash')
+    expect(res.status).toBe(500)
+    expect(await res.text()).toBe('error')
+    expect(errors.length).toBe(1)
+    expect(errors[0].message).toContain('gsp hit an oops')
+  })
 })