From 6efd72738aa354cf6a8a456231f762ec12621786 Mon Sep 17 00:00:00 2001
From: Andrey Breslav <andrey.breslav@jetbrains.com>
Date: Wed, 13 Nov 2013 17:47:38 +0400
Subject: [PATCH] More information in error message

---
 .../src/org/jetbrains/jet/codegen/state/JetTypeMapper.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compiler/backend/src/org/jetbrains/jet/codegen/state/JetTypeMapper.java b/compiler/backend/src/org/jetbrains/jet/codegen/state/JetTypeMapper.java
index d62248fcd90..df8808acb96 100644
--- a/compiler/backend/src/org/jetbrains/jet/codegen/state/JetTypeMapper.java
+++ b/compiler/backend/src/org/jetbrains/jet/codegen/state/JetTypeMapper.java
@@ -347,8 +347,9 @@ public class JetTypeMapper extends BindingTraceAware {
             }
         }
 
-        return String.format("Error types are not allowed when classBuilderMode = %s. For declaration %s:%s in %s:%s",
+        return String.format("Error types are not allowed when classBuilderMode = %s. Descriptor: %s. For declaration %s:%s in %s:%s",
                       classBuilderMode,
+                      descriptor,
                       declarationElement,
                       declarationElement != null ? declarationElement.getText() : "null",
                       parentDeclarationElement,