Tell the user that <property resource="..."> failed - if it fails.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268274 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -23,7 +23,7 @@
  *    Alternately, this acknowlegement may appear in the software itself,
  *    if and wherever such third-party acknowlegements normally appear.
  *
- * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
+ * 4. The names "The Jakarta Project", "Ant", and "Apache Software
  *    Foundation" must not be used to endorse or promote products derived
  *    from this software without prior written permission. For written
  *    permission, please contact apache@apache.org.
@@ -182,9 +182,11 @@ public class Property extends Task {
             if (is != null) {
                 props.load(is);
                 addProperties(props);
+            } else {
+                log("Unable to find resource " + name, Project.MSG_WARN);
             }
         } catch (Exception ex) {
-            ex.printStackTrace();
+            throw new BuildException(ex, location);
         }
     }