this happened on one of the uplex linux vtesters which runs
gcc and clang in parallel un-namespaced

*    top   VTEST Abstract UDS backend: change path, drop poll
**   top   === feature abstract_uds
**** dT    0.004
**   top   === server s1 -listen "@vtc.s1.sock" {
**   s1    Starting server
---- s1    Server listen address (@vtc.s1.sock) cannot be resolved: bind(2)