Implemented Aaron's suggestions to getNames

Author: dalezak

src/lib/extract-chunks.js

@@ -31,8 +31,7 @@ function getChunkEntryNames (chunk) {
   }
 }
 
-const processedGroups = new Set();
-function getNames (groups) {
+function getNames (groups, processed = new Set()) {
   const Entrypoint = require('webpack/lib/Entrypoint')
   const names = []
   for (const group of groups) {
@@ -41,13 +40,12 @@ function getNames (groups) {
       if (group.options.name) {
         names.push(group.options.name)
       }
-    }
-    else if (!processedGroups.has(group)) {
-      processedGroups.add(group);
-      names.push(...getNames(group.parentsIterable));
+    } else if(!processed.has(group)) {
+      processed.add(group);
+      names.push(...getNames(group.parentsIterable, processed))
     }
   }
-  return names
+  return names;
 }
 
 function extractChunks ({ compilation, optionsInclude }) {