{"action":"closed","issue":{"url":"https://api.github.com/repos/rickynils/scalacheck/issues/217","repository_url":"https://api.github.com/repos/rickynils/scalacheck","labels_url":"https://api.github.com/repos/rickynils/scalacheck/issues/217/labels{/name}","comments_url":"https://api.github.com/repos/rickynils/scalacheck/issues/217/comments","events_url":"https://api.github.com/repos/rickynils/scalacheck/issues/217/events","html_url":"https://github.com/rickynils/scalacheck/issues/217","id":131337503,"number":217,"title":"Runtime Exception with scalacheck 1.13.0","user":{"login":"kamilkloch","id":807154,"avatar_url":"https://avatars.githubusercontent.com/u/807154?v=3","gravatar_id":"","url":"https://api.github.com/users/kamilkloch","html_url":"https://github.com/kamilkloch","followers_url":"https://api.github.com/users/kamilkloch/followers","following_url":"https://api.github.com/users/kamilkloch/following{/other_user}","gists_url":"https://api.github.com/users/kamilkloch/gists{/gist_id}","starred_url":"https://api.github.com/users/kamilkloch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kamilkloch/subscriptions","organizations_url":"https://api.github.com/users/kamilkloch/orgs","repos_url":"https://api.github.com/users/kamilkloch/repos","events_url":"https://api.github.com/users/kamilkloch/events{/privacy}","received_events_url":"https://api.github.com/users/kamilkloch/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2016-02-04T12:51:51Z","updated_at":"2016-04-14T17:39:00Z","closed_at":"2016-04-14T17:39:00Z","body":"After updating scalacheck from `1.12.5` to `1.13.0` some tests (`scalatest 2.2.6`) throw the following exception:\r\n\r\n```\r\nAn exception or error caused a run to abort: Implementing class \r\njava.lang.IncompatibleClassChangeError: Implementing class\r\n\tat java.lang.ClassLoader.defineClass1(Native Method)\r\n\tat java.lang.ClassLoader.defineClass(ClassLoader.java:760)\r\n\tat java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)\r\n\tat java.net.URLClassLoader.defineClass(URLClassLoader.java:467)\r\n\tat java.net.URLClassLoader.access$100(URLClassLoader.java:73)\r\n\tat java.net.URLClassLoader$1.run(URLClassLoader.java:368)\r\n```"}}