Fixed the assertion failure for HDFFV-10873.

release_docs/RELEASE.txt

@@ -326,6 +326,20 @@ Bug Fixes since HDF5-1.10.3 release
 
     Library
     -------
+    - Fixed a bug caused by bad tag value when condensing object header
+      messages
+
+      There was an assertion failure when moving meessages from running a
+      user test program with library release hdf5.1.10.4. It was because
+      the tag value (object header's address) was not set up when entering
+      the library routine H5O__chunk_update_idx(), which will eventually 
+      verifies the metadata tag value when protecting the object header.
+
+      The problem was fixed by replacing FUNC_ENTER_PACKAGE in H5O__chunk_update_idx() 
+      with FUNC_ENTER_PACKAGE_TAG(oh->cache_info.addr) to set up the metadata tag.
+
+      (VC - 2019/08/23, HDFFV-10873)
+
     - Fixed the test failure from test_metadata_read_retry_info() in
       test/swmr.c
 

src/H5Ochunk.c

@@ -331,7 +331,7 @@ H5O__chunk_update_idx(H5F_t *f, H5O_t *oh, unsigned idx)
     H5O_chk_cache_ud_t chk_udata;       /* User data for loading chunk */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_PACKAGE_TAG(oh->cache_info.addr)
 
     /* check args */
     HDassert(f);