Propagate source info.

src/bin/rhai-repl.rs

@@ -89,7 +89,7 @@ fn main() {
                 }
             }
 
-            let module = match engine
+            let mut module = match engine
                 .compile(&contents)
                 .map_err(|err| err.into())
                 .and_then(|ast| Module::eval_ast_as_new(Default::default(), &ast, &engine))
@@ -106,6 +106,8 @@ fn main() {
                 Ok(m) => m,
             };
 
+            module.set_id(Some(&filename));
+
             engine.register_global_module(module.into());
 
             has_init_scripts = true;