destroy_viewer_stream(vstream->ctf_trace->viewer_metadata_stream);
vstream->ctf_trace->metadata_stream = NULL;
DBG("Freeing ctf_trace %" PRIu64, vstream->ctf_trace->id);
destroy_viewer_stream(vstream->ctf_trace->viewer_metadata_stream);
vstream->ctf_trace->metadata_stream = NULL;
DBG("Freeing ctf_trace %" PRIu64, vstream->ctf_trace->id);