[IReadYourCode]

Xtend isn't supposed to replace Java. It enhances it. That's why Xtend doesn't compile to byte code but to Java code.

If you do imperative programing in Xtend, there will be exactly one Java method for each Xtend method. I.e. the "Xtend stack trace" (if it would exist) is exactly the same as the Java stack trace.

If you do a more function style of programming and use lambda expressions, each lambda will be a anonymous class in Java 7 or older. So you'll see them in your stack trace. But I guess that you would also see them in Java 8.