queue: Post errors when receiving EOS after downstream returned an error

There might be no further data flow that would allow us to propagate the
error upstream, causing nobody to post an error at all.

diff --git a/plugins/elements/gstqueue.c b/plugins/elements/gstqueue.c
index 46e969f..30fcdc5 100644 (file)
--- a/plugins/elements/gstqueue.c
+++ b/plugins/elements/gstqueue.c
@@ -806,11 +806,20 @@ gst_queue_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
           /* Errors in sticky event pushing are no problem and ignored here
            * as they will cause more meaningful errors during data flow.
            * For EOS events, that are not followed by data flow, we still
-           * return FALSE here though.
+           * return FALSE here though and report an error.
            */
-          if (!GST_EVENT_IS_STICKY (event) ||
-              GST_EVENT_TYPE (event) == GST_EVENT_EOS)
+          if (!GST_EVENT_IS_STICKY (event)) {
             goto out_flow_error;
+          } else if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
+            if (queue->srcresult == GST_FLOW_NOT_LINKED
+                || queue->srcresult < GST_FLOW_EOS) {
+              GST_ELEMENT_ERROR (queue, STREAM, FAILED,
+                  (_("Internal data flow error.")),
+                  ("streaming task paused, reason %s (%d)",
+                      gst_flow_get_name (queue->srcresult), queue->srcresult));
+            }
+            goto out_flow_error;
+          }
         }
         /* refuse more events on EOS */
         if (queue->eos)