patch 7.4.1814

Problem:    A channel may be garbage collected while it's still being used by
            a job. (James McCoy)
Solution:   Mark the channel as used if the job is still used.  Do the same
            for channels that are still used.

src/channel.c

@@ -3553,28 +3553,15 @@ set_ref_in_channel(int copyID)
 {
     int		abort = FALSE;
     channel_T	*channel;
-    int		part;
+    typval_T	tv;
 
     for (channel = first_channel; channel != NULL; channel = channel->ch_next)
-    {
+	if (channel_still_useful(channel))
-	for (part = PART_SOCK; part < PART_IN; ++part)
 	{
-	    jsonq_T *head = &channel->ch_part[part].ch_json_head;
+	    tv.v_type = VAR_CHANNEL;
-	    jsonq_T *item = head->jq_next;
+	    tv.vval.v_channel = channel;
-
+	    abort = abort || set_ref_in_item(&tv, copyID, NULL, NULL);
-	    while (item != NULL)
-	    {
-		list_T	*l = item->jq_value->vval.v_list;
-
-		if (l->lv_copyID != copyID)
-		{
-		    l->lv_copyID = copyID;
-		    abort = abort || set_ref_in_list(l, copyID, NULL);
-		}
-		item = item->jq_next;
-	    }
 	}
-    }
     return abort;
 }
 
@@ -4092,6 +4079,26 @@ job_still_useful(job_T *job)
 		       && channel_still_useful(job->jv_channel)));
 }
 
+/*
+ * Mark references in jobs that are still useful.
+ */
+    int
+set_ref_in_job(int copyID)
+{
+    int		abort = FALSE;
+    job_T	*job;
+    typval_T	tv;
+
+    for (job = first_job; job != NULL; job = job->jv_next)
+	if (job_still_useful(job))
+	{
+	    tv.v_type = VAR_JOB;
+	    tv.vval.v_job = job;
+	    abort = abort || set_ref_in_item(&tv, copyID, NULL, NULL);
+	}
+    return abort;
+}
+
     void
 job_unref(job_T *job)
 {

src/eval.c

@@ -7024,6 +7024,7 @@ garbage_collect(int testing)
 
 #ifdef FEAT_JOB_CHANNEL
     abort = abort || set_ref_in_channel(copyID);
+    abort = abort || set_ref_in_job(copyID);
 #endif
 #ifdef FEAT_NETBEANS_INTG
     abort = abort || set_ref_in_nb_channel(copyID);

src/proto/channel.pro

@@ -49,6 +49,7 @@ void clear_job_options(jobopt_T *opt);
 void free_job_options(jobopt_T *opt);
 int get_job_options(typval_T *tv, jobopt_T *opt, int supported);
 channel_T *get_channel_arg(typval_T *tv, int check_open, int reading, int part);
+int set_ref_in_job(int copyID);
 void job_unref(job_T *job);
 int free_unused_jobs_contents(int copyID, int mask);
 void free_unused_jobs(int copyID, int mask);

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1814,
 /**/
     1813,
 /**/