Fix for prerendering hanging if webpack compilation fails

src/Microsoft.AspNetCore.SpaServices/npm/aspnet-webpack/package.json

@@ -1,6 +1,6 @@
 {
   "name": "aspnet-webpack",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "Helpers for using Webpack in ASP.NET Core projects. Works in conjunction with the Microsoft.AspNetCore.SpaServices NuGet package.",
   "main": "index.js",
   "scripts": {

src/Microsoft.AspNetCore.SpaServices/npm/aspnet-webpack/src/LoadViaWebpack.ts

@@ -78,9 +78,14 @@ function loadViaWebpackNoCache<T>(webpackConfigPath: string, modulePath: string)
             if (err) {
                 reject(err);
             } else {
+                // We're in a callback, so need an explicit try/catch to propagate any errors up the promise chain
+                try {
                     const fileContent = compiler.outputFileSystem.readFileSync('/webpack-output.js', 'utf8');
                     const moduleInstance = requireFromString<T>(fileContent);
                     resolve(moduleInstance);
+                } catch(ex) {
+                    reject(ex);
+                }
             }
         });
     });