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/shared/log.c b/src/shared/log.c
index a7c3195f39..078ccdc35b 100644
--- a/src/shared/log.c
+++ b/src/shared/log.c
@@ -880,6 +880,8 @@ void log_parse_environment(void) {
                                 break;
                         }
                 }
+                if (!isempty(state))
+                        log_warning("Trailing garbage and the end of kernel commandline, ignoring.");
         }
 
         e = secure_getenv("SYSTEMD_LOG_TARGET");