Re-index imported modules if they are not yet indexed.

src/module/resolvers/file.rs

@@ -155,7 +155,7 @@ impl ModuleResolver for FileModuleResolver {
                     Box::new(EvalAltResult::ErrorInModule(path.to_string(), err, pos))
                 })?;
 
-                m.index_all_sub_modules();
+                m.build_index();
 
                 let m: Shared<Module> = m.into();
                 module = Some(m.clone());

src/module/resolvers/stat.rs

@@ -50,7 +50,7 @@ impl StaticModuleResolver {
     /// Add a module keyed by its path.
     #[inline(always)]
     pub fn insert(&mut self, path: impl Into<String>, mut module: Module) {
-        module.index_all_sub_modules();
+        module.build_index();
         self.0.insert(path.into(), module.into());
     }
     /// Remove a module given its path.