Merge branch 'master' into async

lib/src/db.rs

@@ -41,7 +41,7 @@ where
     cur_buf_raw: Cursor<Vec<u8>>,
     table: Vec<LSize>,
     compress_lvl: i32,
-    _t: PhantomData<*const T>,
+    _t: PhantomData<Arc<T>>,
 }
 
 impl<T> Writer<T>
@@ -145,7 +145,7 @@ where
     mmap: Mmap,
     count: usize,
     first_pos: LSize,
-    _t: Option<Arc<T>>, // PhantomData replacement
+    _t: PhantomData<Arc<T>>,
 }
 
 impl<T> Reader<T>
@@ -166,7 +166,7 @@ where
             mmap,
             count,
             first_pos,
-            _t: None,
+            _t: PhantomData,
         })
     }