I was doing this exercise and noticed that the default test had an issue where it was defining the type being passed to the enum as a struct. Test was failing and the compiler advised to remove the type of Point. When it was removed test ran successfully.
After being stuck on exercise enums3.rs for about an hour or two, having read the entire chapter on enums 2-3 times, and still being unable to complete the exercise, i started broadening my reading. I finally found the answer in the rust docs via google.
Hints are now accessible using the CLI subcommand `rustlings hint
<exercise name`.
BREAKING CHANGE: This fundamentally changes the way people interact with exercises.