From 88718e16623de67273d7fce8a3a888172351bff1 Mon Sep 17 00:00:00 2001
From: Andrew Sonin <me@andrewsonin.ru>
Date: Mon, 16 Oct 2023 12:35:26 +0300
Subject: [PATCH] refactor(collections/blazemap/drain): don't drop if it's
 unneeded

---
 src/collections/blazemap/iter.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/collections/blazemap/iter.rs b/src/collections/blazemap/iter.rs
index 106774e..44f29c4 100644
--- a/src/collections/blazemap/iter.rs
+++ b/src/collections/blazemap/iter.rs
@@ -1,5 +1,6 @@
 use std::fmt::{Debug, Formatter};
 use std::marker::PhantomData;
+use std::mem::needs_drop;
 use std::panic::{RefUnwindSafe, UnwindSafe};
 
 use crate::collections::blazemap::BlazeMap;
@@ -481,6 +482,9 @@ impl<'a, K, V> Drop for Drain<'a, K, V>
 {
     #[inline]
     fn drop(&mut self) {
+        if !needs_drop::<V>() {
+            return;
+        }
         let iter = &mut self.inner;
         while iter.len != 0 {
             let value = unsafe { &mut *iter.inner.add(iter.current_position) };