Properly report invalid quoted strings

$ systemd-analyze verify trailing-g.service
[./trailing-g.service:2] Trailing garbage, ignoring.
trailing-g.service lacks ExecStart setting. Refusing.
Error: org.freedesktop.systemd1.LoadFailed: Unit trailing-g.service failed to load: Invalid argument.
Failed to create trailing-g.service/start: Invalid argument

1 files changed, 2 insertions, 0 deletions

diff --git a/src/timesync/timesyncd.c b/src/timesync/timesyncd.c
index 8bb79fb5ee..1bd8cf5614 100644
--- a/src/timesync/timesyncd.c
+++ b/src/timesync/timesyncd.c
@@ -1001,6 +1001,8 @@ static int manager_add_server_string(Manager *m, const char *string) {
                 if (r < 0)
                         log_error("Failed to add server %s to configuration, ignoring: %s", t, strerror(-r));
         }
+        if (!isempty(state))
+                log_warning("Trailing garbage at the end of server list, ignoring.");
 
         return 0;
 }