add reddit URL, fix typo

diff --git a/ralf/_posts/2018-07-13-arc-synchronization.md b/ralf/_posts/2018-07-13-arc-synchronization.md
index dd1e490684ac3816248effcc4ded967a1ef1e71c..7c78cd0dedf3a8d243fea6669332ae63171c6dc1 100644 (file)
--- a/ralf/_posts/2018-07-13-arc-synchronization.md
+++ b/ralf/_posts/2018-07-13-arc-synchronization.md
@@ -1,6 +1,7 @@
 ---
-title: "The Tale of a Bug in Arc: Sychronization and Data Races"
+title: "The Tale of a Bug in Arc: Synchronization and Data Races"
 categories: rust research
+reddit: https://www.reddit.com/r/rust/comments/8ykuhv/the_tale_of_a_bug_in_arc_synchronization_and_data/
 ---
 
 While I was busy doing Rust-unelated research, [RustBelt](https://plv.mpi-sws.org/rustbelt/) continues to move and recently found another bug (after [a missing `impl !Sync` that we found previously]({{ site.baseurl }}{% post_url 2017-06-09-mutexguard-sync %})): It turns out that `Arc::get_mut` did [not perform sufficient synchronization](https://github.com/rust-lang/rust/issues/51780), leading to a data race.