diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ClosureExpressionsTypingVisitor.java b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ClosureExpressionsTypingVisitor.java
index bdd7f35f730..a18095ff5a9 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ClosureExpressionsTypingVisitor.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ClosureExpressionsTypingVisitor.java
@@ -331,7 +331,8 @@ public class ClosureExpressionsTypingVisitor extends ExpressionTypingVisitor {
                 }
                 JetType returnedType = trace.get(EXPRESSION_TYPE, returnedExpression);
                 assert returnedType != null : "No type for returned expression: " + returnedExpression + ",\n" +
-                                              "the type should have been computed by getBlockReturnedType() above";
+                                              "the type should have been computed by getBlockReturnedType() above\n" +
+                                              JetPsiUtil.getElementTextWithContext(returnedExpression);
                 return returnedType;
             }
         });