Generic Traits and SAM type coercion

trait GPredicate<T> {
    abstract boolean test( T t )
}

GPredicate<Integer> p = { Integer n -> n > 1 }

A transform used a generics containing ClassNode GPredicate <T extends java.lang.Object -> java.lang.Object> for the super class GPredicate$TraitAdapter directly. You are not supposed to do this. Please create a new ClassNode referring to the old ClassNode and use the new ClassNode instead of the old one. Otherwise the compiler will create wrong descriptors and a potential NullPointerException in TypeResolver in the OpenJDK. If this is not your own doing, please report this bug to the writer of the transform.
 at line: -1, column: -1