core: fix assertion failure in checking a transaction with a JOB_NOP

Several functions called from transaction_activate() need to correctly
handle the case where a JOB_NOP job is being checked against a unit's
pending job. The assumption that JOB_NOP never merges with other job
types was correct, but since the job_type_is_*() functions are
implemented using the merge lookup, they need to special-case JOB_NOP
to avoid hitting assertion failures.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/core/job.c b/src/core/job.c
index 51d15811b5..1411603e0b 100644
--- a/src/core/job.c
+++ b/src/core/job.c
@@ -352,6 +352,9 @@ bool job_type_is_redundant(JobType a, UnitActiveState b) {
                 return
                         b == UNIT_ACTIVATING;
 
+        case JOB_NOP:
+                return true;
+
         default:
                 assert_not_reached("Invalid job type");
         }