From b1d858a61f332424a666959a7a5e604cc62c91d1 Mon Sep 17 00:00:00 2001
From: Emil Hofstetter <emil.k.hofstetter@gmail.com>
Date: Mon, 12 Dec 2022 09:37:52 -0500
Subject: [PATCH] fix clippy lint by dereferencing ptr explicitly before
 swapping mem

---
 src/lib.rs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 0a96da6..07cdca6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -342,11 +342,15 @@ impl<K: Hash + Eq, V, S: BuildHasher> LruCache<K, V, S> {
 
         match node_ref {
             Some(node_ref) => {
-                let node_ptr: *mut LruEntry<K, V> = node_ref.as_ptr();
-
                 // if the key is already in the cache just update its value and move it to the
                 // front of the list
-                unsafe { mem::swap(&mut v, &mut *(*node_ptr).val.as_mut_ptr()) }
+                let node_ptr: *mut LruEntry<K, V> = node_ref.as_ptr();
+
+                // gets a reference to the node to perform a swap and drops it right after
+                let node_ref = unsafe { &mut (*(*node_ptr).val.as_mut_ptr()) };
+                mem::swap(&mut v, node_ref);
+                let _ = node_ref;
+
                 self.detach(node_ptr);
                 self.attach(node_ptr);
                 Some((k, v))