From 86fc78a9c0a9bfcc344cb5bb998cd7da21d8b9aa Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Mon, 1 Aug 2022 08:01:36 +0800
Subject: [PATCH] replace the broken link for ORC implementation with a working
 one (#20105)

---
 lib/system/orc.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/system/orc.nim b/lib/system/orc.nim
index 4c23aea6c6..32c6b9adc4 100644
--- a/lib/system/orc.nim
+++ b/lib/system/orc.nim
@@ -8,7 +8,7 @@
 #
 
 # Cycle collector based on
-# https://researcher.watson.ibm.com/researcher/files/us-bacon/Bacon01Concurrent.pdf
+# https://www.cs.purdue.edu/homes/hosking/690M/Bacon01Concurrent.pdf
 # And ideas from Lins' in 2008 by the notion of "critical links", see
 # "Cyclic reference counting" by Rafael Dueire Lins
 # R.D. Lins / Information Processing Letters 109 (2008) 71–78