Hallo, thank you for your responses.
It seems, that the bug has been fixed (Revision r10360, date Jun 21, 2011 ) even before the Issue 6551 report from Jul 4, 2011, but did not make it into GWT 2.4 release. So that's not as scary as I thought, just the Bug-tracking was not updated ;-) As to the bad coding point: Good practice or not, implementing or overriding classical abstract methods like 'isValid()' may result in methods always returning 'true', if there is nothing to validate. A Compiler should produce working code, even with bad coding ( or throw a warning). To ignore a method's side-effect is a clear bug. Problem is, that this was my first GWT project and I was very pleased with the workflow and great functionality ( I'm using it with Ext GWT 2.2.5). I had to convince my client to use this technique, who was very skeptical about the Java / JavaScript cross compiling part. So stumbling over an optimizer bug in the first project was not helpful ;-) I must admit, the GWT team fixed that quite fast. Now I'm looking forward to the GWT 2.5 release. Best regards Marc -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/WcsUG-38aAkJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.