fix: try fix memory leak

crossbeam-channel/src/flavors/array.rs

@@ -602,6 +602,42 @@ impl<T> Channel<T> {
     }
 }
 
+impl<T> Drop for Channel<T> {
+    fn drop(&mut self) {
+        if !self.is_disconnected() {
+            let head = *self.head.get_mut();
+            let tail = *self.tail.get_mut();
+            let hix = head & (self.mark_bit - 1);
+            let tix = tail & (self.mark_bit - 1);
+
+            let len = if hix < tix {
+                tix - hix
+            } else if hix > tix {
+                self.cap() - hix + tix
+            } else if (tail & !self.mark_bit) == head {
+                0
+            } else {
+                self.cap()
+            };
+
+            for i in 0..len {
+                // Compute the index of the next slot holding a message.
+                let index = if hix + i < self.cap() {
+                    hix + i
+                } else {
+                    hix + i - self.cap()
+                };
+
+                unsafe {
+                    debug_assert!(index < self.buffer.len());
+                    let slot = self.buffer.get_unchecked_mut(index);
+                    (*slot.msg.get()).assume_init_drop();
+                }
+            }
+        }
+    }
+}
+
 /// Receiver handle to a channel.
 pub(crate) struct Receiver<'a, T>(&'a Channel<T>);