Run sbt clean compile
to gen an exception:
[error] java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
[error] at sun.reflect.annotation.AnnotationParser.parseClassArray(AnnotationParser.java:724)
...
[error] at sbt.internal.inc.ClassToAPI$.toDefinitions0(ClassToAPI.scala:128)
...