Don't exit on errors as during development, empty/incomplete page com…

…ponents are common fixes #4027 (#4040)

* Don't exit on errors as during development, empty/incomplete page components are common fixes #4027

* Fix other points of death

* Ok, do die here

packages/gatsby/src/redux/actions.js

@@ -232,15 +232,10 @@ actions.createPage = (page: PageInput, plugin?: Plugin, traceId?: string) => {
           `You have an empty file in the "src/pages" directory at "${relativePath}". Please remove it or make it a valid component`
         )
         console.log(``)
-        process.exit(1)
+        // TODO actually do die during builds.
+        // process.exit(1)
       }
 
-      console.log(``)
-      console.log(``)
-      console.log(
-        `The page component at "${relativePath}" didn't pass validation`
-      )
-
       if (!includesDefaultExport) {
         console.log(``)
         console.log(
@@ -249,7 +244,8 @@ actions.createPage = (page: PageInput, plugin?: Plugin, traceId?: string) => {
         console.log(``)
       }
 
-      process.exit(1)
+      // TODO actually do die during builds.
+      // process.exit(1)
     }
   }