From 10a35d0ebbb49731795ca4cd16f3e037a78ec73d Mon Sep 17 00:00:00 2001
From: Dana Robinson <43805+derobins@users.noreply.github.com>
Date: Wed, 6 Mar 2024 07:48:28 -0800
Subject: Fix uninitialized bytes in selection I/O test (#4073)

This was due to a complex type fill value being set to -1 instead
of a proper complex value. This was a test problem and not a core
library issue.
---
 test/select_io_dset.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/test/select_io_dset.c b/test/select_io_dset.c
index 33b1c84..1ff7fe2 100644
--- a/test/select_io_dset.c
+++ b/test/select_io_dset.c
@@ -773,7 +773,10 @@ test_cmpd_with_bkg(hid_t fid, unsigned chunked, unsigned mwbuf)
     s2_t   *s2_wbuf_bak = NULL;
     s2_t   *s2_rbuf     = NULL;
     char    dset_name[DSET_NAME_LEN];
-    int     fillvalue = -1;
+    s1_t    fillvalue;
+
+    /* Initialize the fill value */
+    memset(&fillvalue, 0, sizeof(s1_t));
 
     /* Create dataset transfer property list */
     if ((dxpl = H5Pcreate(H5P_DATASET_XFER)) < 0)
-- 
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