Do as you say, PR 19967

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@275466 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Input.java

@@ -142,6 +142,7 @@ public class Input extends Task {
             && getProject().getProperty(addproperty) != null) {
             log("skipping " + getTaskName() + " as property " + addproperty
                 + " has already been set.");
+            return;
         }
 
         InputRequest request = null;
@@ -164,4 +165,4 @@ public class Input extends Task {
         }
     }
 
-}
+}