diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/DeclarationDescriptorImpl.java b/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/DeclarationDescriptorImpl.java
index defab1eca28..e3614e3f356 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/DeclarationDescriptorImpl.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/DeclarationDescriptorImpl.java
@@ -46,6 +46,12 @@ public abstract class DeclarationDescriptorImpl extends AnnotatedImpl implements
 
     @Override
     public String toString() {
-        return DescriptorRenderer.TEXT.render(this) + "[" + getClass().getSimpleName() + "@" + Integer.toHexString(System.identityHashCode(this)) + "]";
+        try {
+            return DescriptorRenderer.TEXT.render(this) + "[" + getClass().getSimpleName() + "@" + Integer.toHexString(System.identityHashCode(this)) + "]";
+        } catch (Throwable e) {
+            // DescriptionRenderer may throw if this is not yet completely initialized
+            // It is very inconvenient while debugging
+            return super.toString();
+        }
     }
 }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/PropertyDescriptor.java b/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/PropertyDescriptor.java
index 361eb70fbb4..27768fa2b22 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/PropertyDescriptor.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/PropertyDescriptor.java
@@ -118,6 +118,16 @@ public class PropertyDescriptor extends VariableDescriptorImpl implements Callab
         return getOutType();
     }
 
+    @Override
+    public JetType getInType() {
+        return super.getInType();
+    }
+
+    @Override
+    @NotNull
+    public JetType getOutType() {
+        return super.getOutType();
+    }
 
     public boolean isVar() {
         return isVar;
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/scopes/WritableScopeImpl.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/scopes/WritableScopeImpl.java
index 37de89a17ca..ed1febfd63a 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/scopes/WritableScopeImpl.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/scopes/WritableScopeImpl.java
@@ -299,11 +299,19 @@ public class WritableScopeImpl extends WritableScopeWithImports {
 
     @Override
     public void addPropertyDescriptorByFieldName(@NotNull String fieldName, @NotNull PropertyDescriptor propertyDescriptor) {
+        if (!fieldName.startsWith("$")) {
+            throw new IllegalStateException();
+        }
+        
         getPropertyDescriptorsByFieldNames().put(fieldName, propertyDescriptor);
     }
 
     @Override
     public PropertyDescriptor getPropertyByFieldReference(@NotNull String fieldName) {
+        if (!fieldName.startsWith("$")) {
+            throw new IllegalStateException();
+        }
+
         PropertyDescriptor descriptor = getPropertyDescriptorsByFieldNames().get(fieldName);
         if (descriptor != null) return descriptor;
         return super.getPropertyByFieldReference(fieldName);