Receive CL_INVALID_EVENT_WAIT_LIST when pass event to ewait by value

[Mr-Andersen]

My code: https://gist.github.com/Mr-Andersen/497df5036a1fcc5b2e5de9a9c73a1dbb In line 59 of main.rs, if you replace &event with event, you don't get any compile errors, but in runtime program fails with CL_INVALID_EVENT_WAIT_LIST.