New and exciting error in the latest compiler

[Brian Goetz]

> And those error messages have to be fixed, they are brutal :)

The error messages are deliberately tuned to give maximal information, 
because right now we're still developing the language and its important 
to have all the information to determine whether the code is in error or 
the compiler.  For that purpose, they're great!  We'll turn the knobs 
down once we're satisfied that things are working as we expect.  (For 
example, there's no need to list out candidates who are not applicable 
because of the wrong arity.)