test for function type

compiler/testData/readKotlinBinaryClass/type/Function1IntString.kt

@@ -0,0 +1,3 @@
+package test
+
+fun fun1(): (String) -> Int = throw Exception()

compiler/tests/org/jetbrains/jet/NamespaceComparator.java

@@ -15,6 +15,8 @@ import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
 import org.jetbrains.jet.lang.descriptors.TypeParameterDescriptor;
 import org.jetbrains.jet.lang.descriptors.ValueParameterDescriptor;
 import org.jetbrains.jet.lang.descriptors.VariableDescriptor;
+import org.jetbrains.jet.lang.resolve.java.JavaDescriptorResolver;
+import org.jetbrains.jet.lang.resolve.java.JavaNamespaceDescriptor;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.resolve.scopes.receivers.ExtensionReceiver;
 import org.jetbrains.jet.lang.types.JetType;
@@ -290,6 +292,10 @@ class NamespaceComparator {
         }
 
         private Method getMethodToSerialize(Object o) {
+            if (o == null) {
+                throw new IllegalStateException("won't serialize null");
+            }
+
             // TODO: cache
             for (Method method : this.getClass().getMethods()) {
                 if (!method.getName().equals("serialize")) {
@@ -328,11 +334,12 @@ class NamespaceComparator {
         }
 
         public void serialize(NamespaceDescriptor ns) {
-            if (ns.getContainingDeclaration() == null) {
-                // root ns
+            if (isRootNs(ns)) {
                 return;
             }
-            new NamespacePrefixSerializer(sb).serialize(ns.getContainingDeclaration());
+            if (ns.getContainingDeclaration() != null) {
+                new NamespacePrefixSerializer(sb).serialize(ns.getContainingDeclaration());
+            }
             sb.append(ns.getName());
         }
 
@@ -356,6 +363,11 @@ class NamespaceComparator {
 
     }
 
+    private static boolean isRootNs(DeclarationDescriptor ns) {
+        // upyachka
+        return ns instanceof JavaNamespaceDescriptor && JavaDescriptorResolver.JAVA_ROOT.equals(ns.getName());
+    }
+
     private static class NamespacePrefixSerializer extends Serializer {
 
         public NamespacePrefixSerializer(StringBuilder sb) {
@@ -364,11 +376,10 @@ class NamespaceComparator {
 
         @Override
         public void serialize(NamespaceDescriptor ns) {
-            if (ns.getContainingDeclaration() == null) {
-                // root ns
+            super.serialize(ns);
+            if (isRootNs(ns)) {
                 return;
             }
-            super.serialize(ns);
             sb.append(".");
         }