From 8b88d97c4193c8886671a654b856661eb27c5f47 Mon Sep 17 00:00:00 2001
From: Benjamin Bentmann <bentmann@apache.org>
Date: Thu, 1 Oct 2009 10:47:10 +0000
Subject: [PATCH] o Extended error message to help diagnose bad class realms

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-3/trunk@820600 13f79535-47bb-0310-9956-ffa450edef68
---
 .../apache/maven/plugin/DefaultBuildPluginManager.java | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java b/maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java
index 98c658b3e2..59da6d3c95 100644
--- a/maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java
+++ b/maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java
@@ -116,6 +116,16 @@ public class DefaultBuildPluginManager
 
             throw new PluginExecutionException( mojoExecution, project, os.toString(), e );
         }
+        catch ( ClassCastException e )
+        {
+            ByteArrayOutputStream os = new ByteArrayOutputStream( 1024 );
+            PrintStream ps = new PrintStream( os );
+            ps.println( "A type incompatibility occured while executing " + mojoDescriptor.getId() );
+            ps.println( e );
+            pluginRealm.display( ps );
+
+            throw new PluginExecutionException( mojoExecution, project, os.toString(), e );
+        }
         finally
         {
             mavenPluginManager.releaseMojo( mojo, mojoExecution );