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kotlinlang

ok, default methods in interfaces within in Kotlin class heirarchy being called from java can result in `AbstractMethodError`.  So how do you work around this:

Interface `Base` with method `init()` in Java.  Kotlin extends this with interface `MyBase` and adds a default implementation of `init()`.  That is extended into `MyMegaBase` interface which does more.  Then finally `HappyConcreteClass` class implements those and has a base class but does not override the default method.  So a call that basically says the following, results in an `AbstractMethodError`:

```
if (instance instanceof Base) {
  ((Base)instance).init();
}
```

The default method should be generated into `MyMegaBase` as the first class that implements the interface, yes?  So why the error.  (reported as <https://youtrack.jetbrains.com/issue/KT-11267>, but maybe isn’t a bug, it is just not allowed)