fix

1 files changed, 13 insertions, 4 deletions

diff --git a/src/fragmentation/fragmentation.c b/src/fragmentation/fragmentation.c
index 71a84225c..77b4c2e49 100644
--- a/src/fragmentation/fragmentation.c
+++ b/src/fragmentation/fragmentation.c
@@ -347,10 +347,19 @@ GNUNET_FRAGMENT_process_ack (struct GNUNET_FRAGMENT_Context *fc,
   if (0 != fc->acks)
     {
       /* more to transmit, do so right now (if tracker permits...) */
-      GNUNET_assert(fc->task != GNUNET_SCHEDULER_NO_TASK);
-      GNUNET_SCHEDULER_cancel (fc->task);
-      fc->task = GNUNET_SCHEDULER_add_now (&transmit_next,
-                                           fc);
+      if (fc->task != GNUNET_SCHEDULER_NO_TASK)
+        {
+          /* schedule next transmission now, no point in waiting... */
+          GNUNET_SCHEDULER_cancel (fc->task);
+          fc->task = GNUNET_SCHEDULER_add_now (&transmit_next,
+                                               fc);
+        }
+      else
+        {
+          /* only case where there is no task should be if we're waiting
+             for the right to transmit again (proc_busy set to YES) */
+          GNUNET_assert (GNUNET_YES == fc->proc_busy);
+        }
       return GNUNET_NO;
     }