make -C tools/testing/selftests TARGETS=net TEST_PROGS=reuseaddr_conflict  TEST_GEN_PROGS="" run_tests
make: Entering directory '/home/virtme/testing-1/tools/testing/selftests'
make[1]: Entering directory '/home/virtme/testing-1/tools/testing/selftests/net'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/virtme/testing-1/tools/testing/selftests/net'
make[1]: Entering directory '/home/virtme/testing-1/tools/testing/selftests/net'
TAP version 13
1..1
# timeout set to 4800
# selftests: net: reuseaddr_conflict
# Opening 127.0.0.1:9999
# Opening INADDR_ANY:9999
# bind: Address already in use
# Opening in6addr_any:9999
# Opening INADDR_ANY:9999
# bind: Address already in use
# Opening INADDR_ANY:9999 after closing ipv6 socket
# bind: Address already in use
# Successok 1 selftests: net: reuseaddr_conflict
make[1]: Leaving directory '/home/virtme/testing-1/tools/testing/selftests/net'
make: Leaving directory '/home/virtme/testing-1/tools/testing/selftests'
xx__-> echo $?
0
xx__->