Index: src/libchcore/TReadBufferQueueWrapper.cpp
===================================================================
diff -u -N -r6c41e7b3cf7711c6f5027c0c0154013f50f08e7b -r685d0da3259dd94327ee8d644a88c155585b8249
--- src/libchcore/TReadBufferQueueWrapper.cpp	(.../TReadBufferQueueWrapper.cpp)	(revision 6c41e7b3cf7711c6f5027c0c0154013f50f08e7b)
+++ src/libchcore/TReadBufferQueueWrapper.cpp	(.../TReadBufferQueueWrapper.cpp)	(revision 685d0da3259dd94327ee8d644a88c155585b8249)
@@ -116,6 +116,8 @@
 
 	void TReadBufferQueueWrapper::SetDataSourceFinished(TOverlappedDataBuffer* pBuffer)
 	{
+		if(!pBuffer)
+			throw TCoreException(eErr_InvalidArgument, L"pBuffer is NULL", LOCATION);
 		if(!pBuffer->IsLastPart())
 			throw TCoreException(eErr_InvalidArgument, L"Trying to set the end of data using unfinished buffer", LOCATION);