fix(worker-lodaer): correctly return errors from loader (#151)

src/common/webpack/worker/worker-loader.ts

@@ -72,16 +72,18 @@ export const pitch: webpack.PitchLoaderDefinitionFunction = function (request) {
 
     const cb = this.async();
     workerCompiler.compile((err, compilation) => {
-        if (!compilation) {
-            return undefined;
+        if (compilation) {
+            workerCompiler.parentCompilation?.children.push(compilation);
         }
 
-        workerCompiler.parentCompilation?.children.push(compilation);
-
         if (err) {
             return cb(err);
         }
 
+        if (!compilation) {
+            return cb(new Error('Child compilation failed'));
+        }
+
         if (compilation.errors && compilation.errors.length) {
             const errorDetails = compilation.errors
                 .map((error) => {
@@ -98,7 +100,7 @@ export const pitch: webpack.PitchLoaderDefinitionFunction = function (request) {
         const cacheIdent = request;
         const objectToHash = compilation.assets[filename];
         if (!objectToHash) {
-            throw new Error(`Asset ${filename} not found in compilation`);
+            return cb(new Error(`Asset ${filename} not found in compilation`));
         }
         const cacheETag = cache.getLazyHashedEtag(objectToHash);