#
#
# patch "netsync.cc"
#  from [4b794f16146e3920795592e55498535f729c811d]
#    to [03b228fbbfd9e84ac504ce39842a2ad4d9e62d57]
#
============================================================
--- netsync.cc	4b794f16146e3920795592e55498535f729c811d
+++ netsync.cc	03b228fbbfd9e84ac504ce39842a2ad4d9e62d57
@@ -2581,11 +2581,19 @@ session::maybe_step()
 void
 session::maybe_step()
 {
+  date_t start_time = date_t::now();
+
   while (done_all_refinements()
          && !rev_enumerator.done()
          && !output_overfull())
     {
       rev_enumerator.step();
+
+      // Safety check, don't spin too long without
+      // returning to the event loop.
+      s64 elapsed_millisec = date_t::now() - start_time;
+      if (elapsed_millisec > 1000 * 10)
+        break;
     }
 }