diff -r cff680298793 -r dd63b6731507 launcher/fx/src/main/java/org/apidesign/bck2brwsr/launcher/fximpl/Console.java
--- a/launcher/fx/src/main/java/org/apidesign/bck2brwsr/launcher/fximpl/Console.java	Mon Apr 18 07:32:35 2016 +0200
+++ b/launcher/fx/src/main/java/org/apidesign/bck2brwsr/launcher/fximpl/Console.java	Tue Apr 19 05:31:17 2016 +0200
@@ -104,7 +104,7 @@
         + "li.appendChild(span);\n"
         + "li.appendChild(details);\n"
         + "p.appendChild(pre);\n"
-        + "ul.appendChild(li);\n"
+        + "if (ul) ul.appendChild(li);\n"
         + "arr[0] = pre;\n"
         + "arr[1] = status;\n"
         + "return arr;"