diff --git a/idea/src/org/jetbrains/jet/plugin/hierarchy/calls/KotlinCallerMethodsTreeStructure.java b/idea/src/org/jetbrains/jet/plugin/hierarchy/calls/KotlinCallerMethodsTreeStructure.java
index 2edcfec82a2..3e4740e5d5b 100644
--- a/idea/src/org/jetbrains/jet/plugin/hierarchy/calls/KotlinCallerMethodsTreeStructure.java
+++ b/idea/src/org/jetbrains/jet/plugin/hierarchy/calls/KotlinCallerMethodsTreeStructure.java
@@ -248,7 +248,7 @@ public abstract class KotlinCallerMethodsTreeStructure extends KotlinCallTreeStr
         if (codeBlockForLocalDeclaration != null) return new WithLocalRoot(project, element, scopeType, codeBlockForLocalDeclaration);
 
         PsiMethod representativeMethod = getRepresentativePsiMethod(element);
-        assert representativeMethod != null;
+        assert representativeMethod != null : "Can't generate light method: " + element.getText();
         return new WithNonLocalRoot(project, element, scopeType, representativeMethod);
     }
 }