diff -r bafc670aa10d -r 2a00bdf753bb launcher/src/main/java/org/apidesign/bck2brwsr/launcher/MethodInvocation.java
--- a/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/MethodInvocation.java	Sun Dec 23 18:24:18 2012 +0100
+++ b/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/MethodInvocation.java	Wed Dec 26 17:10:01 2012 +0100
@@ -29,7 +29,7 @@
     final String className;
     final String methodName;
     private String result;
-    private Exception exception;
+    private Throwable exception;
 
     MethodInvocation(String className, String methodName) {
         this.className = className;
@@ -40,7 +40,7 @@
         wait.await(timeOut, TimeUnit.MILLISECONDS);
     }
     
-    void result(String r, Exception e) {
+    void result(String r, Throwable e) {
         this.result = r;
         this.exception = e;
         wait.countDown();