Replacing selinux module fails with Failed to resolve typeattributeset statement

Issue

Replacing an existing selinux module fails with these error messages:

  # semodule -i stunnel.pp
libsemanage.semanage_direct_install_info: Overriding stunnel module at lower priority 100 with module at priority 400. 
Failed to resolve typeattributeset statement at /etc/selinux/targeted/tmp/modules/400/stunnel/cil:1
semodule:  Failed!