From b4c3a0b10ffc4ef3735dcfeec44a8edd9c6531c8 Mon Sep 17 00:00:00 2001
From: Matthew Feickert <matthew.feickert@cern.ch>
Date: Wed, 6 Sep 2023 20:24:56 -0500
Subject: [PATCH] docs: Add v0.7.4 release notes

* Forward port PR # 2322 from release/v0.7.x to main.
* Add release notes for pyhf v0.7.4.
---
 docs/release-notes.rst        |  1 +
 docs/release-notes/v0.7.4.rst | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 docs/release-notes/v0.7.4.rst

diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index ec607b5b70..c11d6c2019 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -2,6 +2,7 @@
 Release Notes
 =============
 
+.. include:: release-notes/v0.7.4.rst
 .. include:: release-notes/v0.7.3.rst
 .. include:: release-notes/v0.7.2.rst
 .. include:: release-notes/v0.7.1.rst
diff --git a/docs/release-notes/v0.7.4.rst b/docs/release-notes/v0.7.4.rst
new file mode 100644
index 0000000000..e357f5523b
--- /dev/null
+++ b/docs/release-notes/v0.7.4.rst
@@ -0,0 +1,28 @@
+|release v0.7.4|_
+=================
+
+This is a patch release from ``v0.7.3`` → ``v0.7.4``.
+
+Fixes
+-----
+
+* Skip callbacks with dead weakrefs while iterating over callbacks in ``pyhf``
+  events, like :func:`pyhf.set_backend`, to avoid the possibility of accessing
+  dead weakrefs before they could be garbage collected.
+  (PR :pr:`2310`)
+
+  The fixed bug was subtle and occurred nondeterministically when the
+  :class:`pyhf.tensorlib` was changed repeatedly causing dead weakrefs
+  to be accessed before Python's garbage collection could remove them.
+  Most users should be unaffected.
+
+Contributors
+------------
+
+``v0.7.4`` benefited from contributions from:
+
+* Daniel Werner
+* Jonas Rembser
+
+.. |release v0.7.4| replace:: ``v0.7.4``
+.. _`release v0.7.4`: https://github.com/scikit-hep/pyhf/releases/tag/v0.7.4