BT_ASSERT_PRE_HOT(packet, "Packet", ": %!+a", packet);
stream_class = packet->stream->class;
BT_ASSERT_PRE(stream_class->packet_context_fc,
BT_ASSERT_PRE_HOT(packet, "Packet", ": %!+a", packet);
stream_class = packet->stream->class;
BT_ASSERT_PRE(stream_class->packet_context_fc,