patch 7.4.1811
Problem:    Netbeans channel gets garbage collected.
Solution:   Set reference in nb_channel.
diff --git a/src/eval.c b/src/eval.c
index b3a3b41..2b4f230 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -7025,6 +7025,9 @@
 #ifdef FEAT_JOB_CHANNEL
     abort = abort || set_ref_in_channel(copyID);
 #endif
+#ifdef FEAT_NETBEANS_INTG
+    abort = abort || set_ref_in_nb_channel(copyID);
+#endif
 
     if (!abort)
     {
diff --git a/src/netbeans.c b/src/netbeans.c
index b0e7d9e..a80067f 100644
--- a/src/netbeans.c
+++ b/src/netbeans.c
@@ -2585,6 +2585,23 @@
     }
 }
 
+#if defined(FEAT_EVAL) || defined(PROTO)
+    int
+set_ref_in_nb_channel(int copyID)
+{
+    int abort = FALSE;
+    typval_T tv;
+
+    if (nb_channel != NULL)
+    {
+	tv.v_type = VAR_CHANNEL;
+	tv.vval.v_channel = nb_channel;
+	abort = set_ref_in_item(&tv, copyID, NULL, NULL);
+    }
+    return abort;
+}
+#endif
+
 #if defined(FEAT_GUI_X11) || defined(FEAT_GUI_W32) || defined(PROTO)
 /*
  * Tell netbeans that the window was moved or resized.
diff --git a/src/proto/netbeans.pro b/src/proto/netbeans.pro
index 2df71a1..869e966 100644
--- a/src/proto/netbeans.pro
+++ b/src/proto/netbeans.pro
@@ -10,6 +10,7 @@
 int netbeans_active(void);
 void netbeans_open(char *params, int doabort);
 void netbeans_send_disconnect(void);
+int set_ref_in_nb_channel(int copyID);
 void netbeans_frame_moved(int new_x, int new_y);
 void netbeans_file_activated(buf_T *bufp);
 void netbeans_file_opened(buf_T *bufp);
diff --git a/src/version.c b/src/version.c
index 28308a6..714a6d9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1811,
+/**/
     1810,
 /**/
     1809,