parse tweaks

src/syntax/validate.rs

@@ -68,6 +68,7 @@ impl Program {
     /// actually a problem.
     pub fn validate(&self) -> (Vec<Error>, Vec<Warning>) {
         let mut bound_variables = ScopedMap::new();
+        println!("validate: {}", self);
         self.validate_with_bindings(&mut bound_variables)
     }