Collect nested classes from all 4 builtin packages.

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/platform/JvmPlatform.kt

@@ -61,8 +61,7 @@ private val DEFAULT_IMPORTS_FOR_JVM: List<ImportPath> = ArrayList<ImportPath>().
     }
 
     val builtIns = JvmPlatform.builtIns
-    addAllClassifiersFromScope(builtIns.builtInsPackageScope)
+    for (builtinPackageFragment in builtIns.builtinsPackageFragments) {
-    addAllClassifiersFromScope(builtIns.collectionsPackageFragment.getMemberScope())
+        addAllClassifiersFromScope(builtinPackageFragment.getMemberScope())
-    addAllClassifiersFromScope(builtIns.rangesPackageFragment.getMemberScope())
+    }
-    addAllClassifiersFromScope(builtIns.annotationPackageFragment.getMemberScope())
 }

core/descriptors/src/org/jetbrains/kotlin/builtins/KotlinBuiltIns.java

@@ -67,6 +67,8 @@ public abstract class KotlinBuiltIns {
     private final BuiltinsPackageFragment rangesPackageFragment;
     private final BuiltinsPackageFragment annotationPackageFragment;
 
+    private final Set<BuiltinsPackageFragment> builtinsPackageFragments;
+
     private final Map<PrimitiveType, KotlinType> primitiveTypeToArrayKotlinType;
     private final Map<KotlinType, KotlinType> primitiveKotlinTypeToKotlinArrayType;
     private final Map<KotlinType, KotlinType> kotlinArrayTypeToPrimitiveKotlinType;
@@ -95,13 +97,15 @@ public abstract class KotlinBuiltIns {
         builtInsModule.initialize(packageFragmentProvider);
         builtInsModule.setDependencies(builtInsModule);
 
-        packageNameToPackageFragment = new HashMap<FqName, BuiltinsPackageFragment>();
+        packageNameToPackageFragment = new LinkedHashMap<FqName, BuiltinsPackageFragment>();
 
         builtinsPackageFragment = getBuiltinsPackageFragment(packageFragmentProvider, packageNameToPackageFragment, BUILT_INS_PACKAGE_FQ_NAME);
         collectionsPackageFragment = getBuiltinsPackageFragment(packageFragmentProvider, packageNameToPackageFragment, COLLECTIONS_PACKAGE_FQ_NAME);
         rangesPackageFragment = getBuiltinsPackageFragment(packageFragmentProvider, packageNameToPackageFragment, RANGES_PACKAGE_FQ_NAME);
         annotationPackageFragment = getBuiltinsPackageFragment(packageFragmentProvider, packageNameToPackageFragment, ANNOTATION_PACKAGE_FQ_NAME);
 
+        builtinsPackageFragments = new LinkedHashSet<BuiltinsPackageFragment>(packageNameToPackageFragment.values());
+
         primitiveTypeToArrayKotlinType = new EnumMap<PrimitiveType, KotlinType>(PrimitiveType.class);
         primitiveKotlinTypeToKotlinArrayType = new HashMap<KotlinType, KotlinType>();
         kotlinArrayTypeToPrimitiveKotlinType = new HashMap<KotlinType, KotlinType>();
@@ -246,6 +250,11 @@ public abstract class KotlinBuiltIns {
         return builtInsModule;
     }
 
+    @NotNull
+    public Set<BuiltinsPackageFragment> getBuiltinsPackageFragments() {
+        return builtinsPackageFragments;
+    }
+
     @NotNull
     public PackageFragmentDescriptor getBuiltInsPackageFragment() {
         return builtinsPackageFragment;

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/AllClassesCompletion.kt

@@ -44,9 +44,11 @@ class AllClassesCompletion(private val parameters: CompletionParameters,
 
         //TODO: this is a temporary solution until we have built-ins in indices
         // we need only nested classes because top-level built-ins are all added through default imports
-        collectClassesFromScope(resolutionFacade.moduleDescriptor.builtIns.builtInsPackageScope) {
+        for (builtinPackage in resolutionFacade.moduleDescriptor.builtIns.builtinsPackageFragments) {
-            if (it.containingDeclaration is ClassDescriptor) {
+            collectClassesFromScope(builtinPackage.getMemberScope()) {
-                classDescriptorCollector(it)
+                if (it.containingDeclaration is ClassDescriptor) {
+                    classDescriptorCollector(it)
+                }
             }
         }