Unfortunate error message for enum variant used in alt branch but not imported

[jdm]

mod bar {
    enum foo {
        alpha,
        beta,
        charlie
    }
}

fn main() {
    import bar::{alpha, charlie};
    alt alpha {
      alpha | beta {}
      charlie {}
    }
}

yields

binding.rs:12:14: 12:18 error: inconsistent number of bindings
binding.rs:12       alpha | beta {}
                            ^~~~

I flailed around for a while before I figured out what was going on.

[catamorphism]

This is also a resolve issue, hence postponing until resolve3 is live.

[catamorphism]

Technically, the compiler was behaving correctly: beta is a variable here, since you forgot the import. But I agree it's very confusing. In f39477d I added a new hint to the error message that prints out all the pattern bindings when resolve fails with "inconsistent number of bindings". Try it out and let me know what you think!