some minor improvements

lib/runtime-c-api/src/import/mod.rs

@@ -206,7 +206,7 @@ pub unsafe extern "C" fn wasmer_import_object_iterate_functions(
         return std::ptr::null_mut();
     }
     let import_object: &ImportObject = &*(import_object as *const ImportObject);
-    let iter_inner = Box::new(import_object.clone_ref().into_iter().filter(|(_, _, e)| {
+    let iter_inner = Box::new(import_object.clone().into_iter().filter(|(_, _, e)| {
         if let Export::Function { .. } = e {
             true
         } else {

lib/runtime-core/src/import.rs

@@ -54,6 +54,7 @@ impl IsExport for Export {
 ///     n
 /// }
 /// ```
+#[derive(Clone)]
 pub struct ImportObject {
     map: Arc<Mutex<HashMap<String, Box<dyn LikeNamespace + Send>>>>,
     pub(crate) state_creator:
@@ -158,15 +159,6 @@ impl ImportObject {
             .and_then(|ns| f(ns))
     }
 
-    /// Create a clone ref of this namespace.
-    pub fn clone_ref(&self) -> Self {
-        Self {
-            map: Arc::clone(&self.map),
-            state_creator: self.state_creator.clone(),
-            allow_missing_functions: false,
-        }
-    }
-
     fn get_objects(&self) -> VecDeque<(String, String, Export)> {
         let mut out = VecDeque::new();
         let guard = self.map.lock().unwrap();

lib/runtime-core/src/instance.rs

@@ -103,7 +103,7 @@ impl Instance {
             module,
             inner,
             exports,
-            import_object: imports.clone_ref(),
+            import_object: imports.clone(),
         };
 
         if let Some(start_index) = instance.module.info.start_func {

lib/wasi/src/syscalls/mod.rs

@@ -1981,10 +1981,8 @@ pub fn path_remove_directory(
         Kind::Dir { entries, path, .. } => {
             if !entries.is_empty() {
                 return __WASI_ENOTEMPTY;
-            } else {
-                if wasi_try!(std::fs::read_dir(path).ok(), __WASI_EIO).count() != 0 {
-                    return __WASI_ENOTEMPTY;
-                }
+            } else if wasi_try!(std::fs::read_dir(path).ok(), __WASI_EIO).count() != 0 {
+                return __WASI_ENOTEMPTY;
             }
             path.clone()
         }

src/commands/cache.rs

@@ -21,7 +21,7 @@ impl Cache {
                 if cache_dir.exists() {
                     fs::remove_dir_all(cache_dir.clone()).expect("Can't remove cache dir");
                 }
-                fs::create_dir_all(cache_dir.clone()).expect("Can't create cache dir");
+                fs::create_dir_all(cache_dir).expect("Can't create cache dir");
             }
             Cache::Dir => {
                 println!("{}", get_cache_dir().to_string_lossy());

tests/test-generator/src/lib.rs

@@ -70,7 +70,7 @@ pub fn build_ignores_from_textfile(path: PathBuf) -> anyhow::Result<Ignores> {
         } else {
             (line, None)
         };
-        if line.len() == 0 {
+        if line.is_empty() {
             continue;
         }
 

tests/wast/src/wast.rs

@@ -292,7 +292,7 @@ impl Wast {
         let compiler = compiler_for_backend(self.backend).expect("backend not found");
         let module = compile_with_config_with(module, config, &*compiler)?;
 
-        let mut imports = self.import_object.clone_ref();
+        let mut imports = self.import_object.clone();
 
         for import in module.imports() {
             let module_name = import.namespace;