diff -r 80a388c8c27b -r 62c327a1e23f vm/src/main/java/org/apidesign/vm4brwsr/VMLazy.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/VMLazy.java	Mon Jan 21 13:39:23 2013 +0100
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/VMLazy.java	Thu Jan 24 17:08:02 2013 +0100
@@ -98,7 +98,7 @@
         "try {\n" +
         "  new Function(script)(loader, name);\n" +
         "} catch (ex) {\n" +
-        "  throw 'Cannot compile ' + ex + ' line: ' + ex.lineNumber + ' script:\\n' + script;\n" +
+        "  throw 'Cannot compile ' + name + ' ' + ex + ' line: ' + ex.lineNumber + ' script:\\n' + script;\n" +
         "}\n" +
         "return name != null ? vm[name](instance) : null;\n"
     )