making it more fool proof, thanks to my colleagues.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@13545 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/FilePath.java

@@ -1047,6 +1047,9 @@ public final class FilePath implements Serializable {
     public String validateAntFileMask(final String fileMasks) throws IOException, InterruptedException {
         return act(new FileCallable<String>() {
             public String invoke(File dir, VirtualChannel channel) throws IOException {
+                if(fileMasks.startsWith("~"))
+                    return Messages.FilePath_TildaDoesntWork();
+
                 StringTokenizer tokens = new StringTokenizer(fileMasks,",");
 
                 while(tokens.hasMoreTokens()) {