Github user paulk-asert commented on the pull request: https://github.com/apache/groovy/commit/1972c21cb2ccade3109cf9befdbbc3ff9c7dad68#commitcomment-26458323 Does this look related? The latest CI build says: [testStreamOf] (class: java_util_stream_Stream$of, method: call signature: (Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;) Illegal type in constant pool [00:01:02] [testStreamOf] java.lang.VerifyError: (class: java_util_stream_Stream$of, method: call signature: (Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;) Illegal type in constant pool
---