From ac00dfdb0eb7537d640eedf1e323d1627e62124e Mon Sep 17 00:00:00 2001
From: mattjala <124107509+mattjala@users.noreply.github.com>
Date: Mon, 18 Mar 2024 23:52:31 -0500
Subject: [PATCH] Add RELEASE.txt note for cmpd segfault fix (#4175)

RELEASE notice for the fix in #3842
---
 release_docs/RELEASE.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 489802cbc8d..f164b3baf72 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -614,6 +614,15 @@ Bug Fixes since HDF5-1.14.3 release
       of MPI-2 maintenance and testing since version HDF5 1.12.
 
 
+    - Fixed a segfault when using a user-defined conversion function between compound datatypes
+
+      During type info initialization for compound datatype conversion, the library checked if the
+      datatypes are subsets of one another in order to perform special conversion handling. 
+      This check uses information that is only defined if a library conversion function is in use. 
+      The library now skips this check for user-defined conversion functions.
+
+      Fixes Github issue #3840
+
     Java Library
     ------------
     -