Is this a bug in the ipv6 dissector?

[蓝常珍 <lanczyx () gmail com>]

In the function "dissect_ipv6" of the ipv6
dissector(packet-ipv6.c),the ip6_hdr struct is allocated on the
stack,then it's address is passed to tap_queue_packet.I notice that
the other dissectors do not look like this.

The code snippet of the dissect_ipv6 function,from dev-version 1.99.0:

static void
dissect_ipv6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
struct ip6_hdr ipv6;
...
tap_queue_packet(ipv6_tap, pinfo, &ipv6);
...
}
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