From bbd7803ee0b7ec672f41fda2192bf73cd2b2c2a8 Mon Sep 17 00:00:00 2001
From: Peter Reilly <peterreilly@apache.org>
Date: Wed, 17 Sep 2003 17:06:44 +0000
Subject: [PATCH] Restrict antlib tasks to be instanceof AntLibInterface Deal
 with types later

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@275254 13f79535-47bb-0310-9956-ffa450edef68
---
 src/main/org/apache/tools/ant/taskdefs/Antlib.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/org/apache/tools/ant/taskdefs/Antlib.java b/src/main/org/apache/tools/ant/taskdefs/Antlib.java
index 84279f043..08af7ba62 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Antlib.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Antlib.java
@@ -183,6 +183,10 @@ public class Antlib extends Task implements TaskContainer {
             if (t == null) {
                 continue;
             }
+            if (!(t instanceof AntlibInterface)) {
+                throw new BuildException(
+                    "Invalid element in antlib " + ue.getTag());
+            }
             if (t instanceof AntlibInterface) {
                 AntlibInterface d = (AntlibInterface) t;
                 d.setURI(uri);