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-rw-r--r--src/lib/writer.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/lib/writer.cc b/src/lib/writer.cc
index 39d6f6118..b135f4321 100644
--- a/src/lib/writer.cc
+++ b/src/lib/writer.cc
@@ -342,6 +342,8 @@ try
break;
}
+ DCPOMATIC_ASSERT (_queue.size() < _maximum_queue_size);
+
/* Nothing to do: wait until something happens which may indicate that we do */
LOG_TIMING (N_("writer-sleep queue=%1"), _queue.size());
_empty_condition.wait (lock);