From 682ad87ddf9ab3eb48d42dc9826d2d90c4031da3 Mon Sep 17 00:00:00 2001
From: markopy <48253511+markopy@users.noreply.github.com>
Date: Sat, 3 Oct 2020 16:28:54 +0100
Subject: [PATCH] Fix issue #321

---
 hdbscan/_hdbscan_linkage.pyx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/hdbscan/_hdbscan_linkage.pyx b/hdbscan/_hdbscan_linkage.pyx
index cec85f95..8c454d1c 100644
--- a/hdbscan/_hdbscan_linkage.pyx
+++ b/hdbscan/_hdbscan_linkage.pyx
@@ -182,14 +182,16 @@ cdef class UnionFind (object):
         return
 
     cdef np.intp_t fast_find(self, np.intp_t n):
-        cdef np.intp_t p
+        cdef np.intp_t p, tmp
         p = n
         while self.parent[n] != -1:
             n = self.parent[n]
         # label up to the root if this is not the root already
         if p != n:
             while self.parent[p] != n:
-                p, self.parent[p] = self.parent[p], n
+                tmp = self.parent[p]
+                self.parent[p] = n
+                p = tmp
         return n