Proper scoping for inner classes: they must shadow outer classes

compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyClassDescriptor.java

@@ -137,8 +137,8 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
     public JetScope getScopeForMemberDeclarationResolution() {
         if (scopeForMemberDeclarationResolution == null) {
             WritableScopeImpl scope = new WritableScopeImpl(
-                    getScopeForClassHeaderResolution(), this, RedeclarationHandler.DO_NOTHING, "Member Declaration Resolution");
+                    getScopeForMemberLookup(), this, RedeclarationHandler.DO_NOTHING, "Member Declaration Resolution");
-            scope.importScope(getScopeForMemberLookup());
+            scope.importScope(getScopeForClassHeaderResolution());
 
             scope.changeLockLevel(WritableScope.LockLevel.READING);
             scopeForMemberDeclarationResolution = scope;

compiler/testData/lazyResolve/namespaceComparator/InnerClassNameClash.kt

@@ -0,0 +1,8 @@
+class B {
+    class B {
+      fun foo(b: B.C) {
+      }
+      class C {
+      }
+    }
+}

compiler/testData/lazyResolve/namespaceComparator/InnerClassNameClash.txt

@@ -0,0 +1,12 @@
+namespace <root>
+
+internal final class B : jet.Any {
+    public final /*constructor*/ fun <init>(): B
+    internal final class B.B : jet.Any {
+        public final /*constructor*/ fun <init>(): B.B
+        internal final class B.B.C : jet.Any {
+            public final /*constructor*/ fun <init>(): B.B.C
+        }
+        internal final fun foo(/*0*/ b: B.B.C): jet.Tuple0
+    }
+}

compiler/tests/org/jetbrains/jet/lang/resolve/lazy/LazyResolveNamespaceComparingTestGenerated.java

@@ -1277,6 +1277,11 @@ public class LazyResolveNamespaceComparingTestGenerated extends AbstractLazyReso
             doTest("compiler/testData/lazyResolve/namespaceComparator/genericFunction.kt");
         }
         
+        @TestMetadata("InnerClassNameClash.kt")
+        public void testInnerClassNameClash() throws Exception {
+            doTest("compiler/testData/lazyResolve/namespaceComparator/InnerClassNameClash.kt");
+        }
+        
         @TestMetadata("innerObject.kt")
         public void testInnerObject() throws Exception {
             doTest("compiler/testData/lazyResolve/namespaceComparator/innerObject.kt");