Stack overflow during compilation

that's the first time we get something like that... could you please give the full trace, because from the part I see I cannot see where the loop should be, that is causing the StackOverflowError.

get the same problem on Sun Java 6 with compilation targeting 1.5 (this is set across many modules so I can't easily try targeting 1.6)

I had:

class NodeViewFactory extends RootFactory implements NodeViewFactory {
...
}

note the same name of the defined class and the interface it is about to implement.
After I change the name of the interface, the problem disappears.
Still not a good way to inform a user about a problem in his code

ah, ok, that information is what I needed. we had a similar loop somewhere else.

This has already been fixed - as part of GROOVY-2855 (since 1.6.3/1.7-beta-1).

Running the code

class RootFactory {}
class NodeViewFactory extends RootFactory implements NodeViewFactory {}

results now in compilation error

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed, ..\Try.groovy: 2: Cycle detected: the type NodeViewFactory cannot implement itself
. At [2:1]  @ line 2, column 1.
   class NodeViewFactory extends RootFactory implements NodeViewFactory {}
   ^

1 error

I am still encountering this issue. I am using a groovy plugin for Eclipse; according to Eclipse, it is Groovy Compiler version 1.7.2.20100410-2100-e35. It occurs whenever I make a groovy class implement itself.

Please try it outside the groovy eclipse environment (command line, groovy console, groovy web console) and see whether you still get the issue. If not, then you need to report the issue to GRECLIPSE project that handles groovy eclipse plugin.