Description of problem:
flood of warning

Version-Release number of selected component (if applicable):
createrepo_c-0.11.1-1.fc29

How reproducible:
Always

Steps to Reproduce:
1. mkdir /tmp/foo; cd /tmp/foo
2. createrepo_c -d .

Actual results:
Directory walk done - 0 packages
Temporary output repo path: ./.repodata/
Preparing sqlite DBs
Pool started (with 5 workers)
Pool finished
08:58:12: posix_spawn avoided (fd close requested) 
08:58:12: posix_spawn avoided (fd close requested) 
08:58:12: posix_spawn avoided (fd close requested) 
08:58:12: posix_spawn avoided (fd close requested) 


Expected results:
No warning

Additional info:
createrepo also affected, perhaps something wrong in some system libraries/