[JENKINS-21018]

Being defensive.

core/src/main/java/hudson/util/spring/BeanBuilder.java

@@ -125,6 +125,8 @@ public class BeanBuilder extends GroovyObjectSupport {
      * Parses the bean definition groovy script by first exporting the given {@link Binding}. 
      */
     public void parse(InputStream script, Binding binding) {
+        if (script==null)
+            throw new IllegalArgumentException("No script is provided");
         setBinding(binding);
         CompilerConfiguration cc = new CompilerConfiguration();
         cc.setScriptBaseClass(ClosureScript.class.getName());