Description of problem:
Had to rebuild collectd SRPM (for implanting an extension), but found that even vanilla SRPMS can't be currently rebuilded


Version-Release number of selected component (if applicable):
collectd-5.9.0-5.el8.src.rpm


How reproducible:
Always


Steps to Reproduce:
1. rpmbuild --rebuild collectd-5.9.0-5.el8.src.rpm

Actual results:
...
PASS: test_plugin_pcie_errors
PASS: test_plugin_snmp_agent
FAIL: test_plugin_virt
============================================================================
Testsuite summary for collectd 5.9.0
============================================================================
# TOTAL: 27
# PASS:  25
# SKIP:  0
# XFAIL: 0
# FAIL:  2
# XPASS: 0
# ERROR: 0
============================================================================
See ./test-suite.log
============================================================================


Expected results:
rebuild without problems


Additional info:
rpmbuild/BUILD/collectd-5.9.0/test-suite.log contains following


======================================
   collectd 5.9.0: ./test-suite.log
======================================

# TOTAL: 27
# PASS:  25
# SKIP:  0
# XFAIL: 0
# FAIL:  2
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: test_plugin_virt
======================

Testing get_domain_state_notify ...
ok 1 - ret = 0
Success.
Testing persistent_domains_state_notification ...
ok 2 - ret = 0
Success.
==3923578== 16 bytes in 1 blocks are possibly lost in loss record 120 of 371
==3923578==    at 0x4C3ADBB: calloc (vg_replace_malloc.c:1117)
==3923578==    by 0x79014CD: g_malloc0 (in /usr/lib64/libglib-2.0.so.0.5600.4)
==3923578==    by 0x768A576: ??? (in /usr/lib64/libgobject-2.0.so.0.5600.4)
==3923578==    by 0x768D858: g_type_register_fundamental (in /usr/lib64/libgobject-2.0.so.0.5600.4)
==3923578==    by 0x766CA4E: ??? (in /usr/lib64/libgobject-2.0.so.0.5600.4)
==3923578==    by 0x76662C7: ??? (in /usr/lib64/libgobject-2.0.so.0.5600.4)
==3923578==    by 0x400F8B9: call_init.part.0 (in /usr/lib64/ld-2.28.so)
==3923578==    by 0x400F9B9: _dl_init (in /usr/lib64/ld-2.28.so)
==3923578==    by 0x4000FD9: ??? (in /usr/lib64/ld-2.28.so)
==3923578==
{
   <insert_a_suppression_name_here>
   Memcheck:Leak
   match-leak-kinds: possible
   fun:calloc
   fun:g_malloc0
   obj:/usr/lib64/libgobject-2.0.so.0.5600.4
   fun:g_type_register_fundamental
   obj:/usr/lib64/libgobject-2.0.so.0.5600.4
   obj:/usr/lib64/libgobject-2.0.so.0.5600.4
   fun:call_init.part.0
   fun:_dl_init
   obj:/usr/lib64/ld-2.28.so
}

(bunch of such entries are following)