diff --git a/napi/Cargo.toml b/napi/Cargo.toml
index e9eb9fd9..cf2b7d54 100644
--- a/napi/Cargo.toml
+++ b/napi/Cargo.toml
@@ -7,7 +7,7 @@ license = "MIT"
 name = "napi"
 readme = "README.md"
 repository = "https://github.com/napi-rs/napi-rs"
-version = "1.0.0-alpha.0"
+version = "1.0.0-alpha.1"
 
 [features]
 default = ["napi3"] # for most NodeJS users
diff --git a/napi/src/js_values/buffer.rs b/napi/src/js_values/buffer.rs
index fd3476e0..4cf485a8 100644
--- a/napi/src/js_values/buffer.rs
+++ b/napi/src/js_values/buffer.rs
@@ -21,12 +21,7 @@ impl JsBuffer {
     let mut data = ptr::null_mut();
     let mut len: usize = 0;
     check_status!(unsafe {
-      sys::napi_get_buffer_info(
-        self.0.env,
-        self.0.value,
-        &mut data,
-        &mut len as *mut usize as *mut _,
-      )
+      sys::napi_get_buffer_info(self.0.env, self.0.value, &mut data, &mut len)
     })?;
     Ok(JsBufferValue {
       data: mem::ManuallyDrop::new(unsafe { Vec::from_raw_parts(data as *mut _, len, len) }),
diff --git a/napi/src/js_values/error.rs b/napi/src/js_values/error.rs
index da18f0de..24819f5d 100644
--- a/napi/src/js_values/error.rs
+++ b/napi/src/js_values/error.rs
@@ -25,19 +25,18 @@ macro_rules! impl_object_methods {
         let mut error_code = ptr::null_mut();
         let mut reason_string = ptr::null_mut();
         let mut js_error = ptr::null_mut();
-        debug_assert!(
-          sys::napi_create_string_utf8(
-            env,
-            error_code_string.as_ptr(),
-            status_len,
-            &mut error_code
-          ) == sys::Status::napi_ok
+        let create_code_status = sys::napi_create_string_utf8(
+          env,
+          error_code_string.as_ptr(),
+          status_len,
+          &mut error_code,
         );
-        debug_assert!(
-          sys::napi_create_string_utf8(env, reason.as_ptr(), reason_len, &mut reason_string)
-            == sys::Status::napi_ok
-        );
-        debug_assert!($kind(env, error_code, reason_string, &mut js_error) == sys::Status::napi_ok);
+        debug_assert!(create_code_status == sys::Status::napi_ok);
+        let create_reason_status =
+          sys::napi_create_string_utf8(env, reason.as_ptr(), reason_len, &mut reason_string);
+        debug_assert!(create_reason_status == sys::Status::napi_ok);
+        let create_error_status = $kind(env, error_code, reason_string, &mut js_error);
+        debug_assert!(create_error_status == sys::Status::napi_ok);
         js_error
       }
 
@@ -47,7 +46,8 @@ macro_rules! impl_object_methods {
       /// This function is safety if env is not null ptr.
       pub unsafe fn throw_into(self, env: sys::napi_env) {
         let js_error = self.into_value(env);
-        debug_assert!(sys::napi_throw(env, js_error) == sys::Status::napi_ok);
+        let throw_status = sys::napi_throw(env, js_error);
+        debug_assert!(throw_status == sys::Status::napi_ok);
       }
 
       #[inline(always)]