diff --git a/compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java b/compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java
index 9e7d1037eb1..3442b0cea93 100644
--- a/compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java
+++ b/compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2013 JetBrains s.r.o.
+ * Copyright 2010-2014 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -390,7 +390,9 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
         for (JetDelegationSpecifier specifier : delegationSpecifiers) {
             if (specifier instanceof JetDelegatorToSuperClass || specifier instanceof JetDelegatorToSuperCall) {
                 JetType superType = bindingContext.get(BindingContext.TYPE, specifier.getTypeReference());
-                assert superType != null;
+                assert superType != null :
+                        String.format("No type recorded for \n---\n%s\n---\n", JetPsiUtil.getElementTextWithContext(specifier));
+
                 ClassDescriptor superClassDescriptor = (ClassDescriptor) superType.getConstructor().getDeclarationDescriptor();
                 assert superClassDescriptor != null;
                 if (!isInterface(superClassDescriptor)) {
diff --git a/compiler/backend/src/org/jetbrains/jet/codegen/binding/CodegenAnnotatingVisitor.java b/compiler/backend/src/org/jetbrains/jet/codegen/binding/CodegenAnnotatingVisitor.java
index c61de402204..42782ae7d82 100644
--- a/compiler/backend/src/org/jetbrains/jet/codegen/binding/CodegenAnnotatingVisitor.java
+++ b/compiler/backend/src/org/jetbrains/jet/codegen/binding/CodegenAnnotatingVisitor.java
@@ -154,7 +154,8 @@ class CodegenAnnotatingVisitor extends JetVisitorVoid {
     @Override
     public void visitEnumEntry(@NotNull JetEnumEntry enumEntry) {
         ClassDescriptor descriptor = bindingContext.get(CLASS, enumEntry);
-        assert descriptor != null;
+        assert descriptor != null :
+                String.format("No descriptor for enum entry \n---\n%s\n---\n", JetPsiUtil.getElementTextWithContext(enumEntry));
 
         boolean trivial = enumEntry.getDeclarations().isEmpty();
         if (!trivial) {