duplicated non-existence proof with +dnssec
When the answer comes from the upstream, it's good.
$ kdig @127.0.0.1 -p 6667 A notexists.org
...
;; AUTHORITY SECTION:
org. 684 IN SOA a0.org.afilias-nst.info. noc.afilias-nst.info. 2011985870 1800 900 604800 86400
org. 684 IN SOA a0.org.afilias-nst.info. noc.afilias-nst.info. 2011985870 1800 900 604800 86400
org. 684 IN RRSIG SOA 7 1 900 20160531233745 20160510223745 52860 org. LbwYB0WF9A1e3+t+OAqbrBArFGqoXXHsTN3MCzT5AM0rALYqc4+5dL1F MPgMTsTr5SqHgptPrbIwzumUdmJ9aFwBOXfFvATSrZr7k6lixTnx++zq Wv9P51ggVPb060Jdjb5yXwHpGXuqFsJ/Zvh0TVvkT5qmNKOvobaMel7+ cYc=
h9p7u7tr2u91d0v0ljs9l1gidnp90u3h.org. 86184 IN NSEC3 1 1 1 D399EAAB H9PARR669T6U8O1GSG9E1LMITK4DEM0T NS SOA RRSIG DNSKEY NSEC3PARAM
h9p7u7tr2u91d0v0ljs9l1gidnp90u3h.org. 86184 IN RRSIG NSEC3 7 2 86400 20160531233745 20160510223745 52860 org. VRmFqGWjHW21CSn8LS0XcqhDvdvNzS88//QOSNJXYB8IQXpi6w5PyzEr 1IRsZ7akeeGA8oFuIIosnnbkHHATNcFKIIZiDhfqlqUciYoQolxonu6K /d5+yX8l3DSU4ezpzZQr/SrkO1sNitzezDihgsxhXBFpd7+dwYqErKkh WzI=
sgkmag4eddlk9u0gdg4rijrgaablvuce.org. 86184 IN NSEC3 1 1 1 D399EAAB SGL6846A77U7AF5TJ7UL5GHNNP64MF8L
sgkmag4eddlk9u0gdg4rijrgaablvuce.org. 86184 IN RRSIG NSEC3 7 2 86400 20160530150327 20160509140327 52860 org. 1WpIKnpy0/rdrK9zNxKAYHvqdSGphjX1HFl9+TAFN1gqOPfErGGz6vPP YHuFDrSrfcziUw+Mu7udX/He9UHRMntV07w2TnNlOntJIG74dHDWo919 f1ZM0ZVXNQFEFOdFwnJM/wF6z75mpSSPekbNvHpBHfHYWTDs7LCuBTt0 bPg=
vaittv1g2ies9s3920soaumh73klnhs5.org. 86184 IN NSEC3 1 1 1 D399EAAB VAJSHJ9G9U88NEFMNIS1LOG48CM6L9LO NS DS RRSIG
vaittv1g2ies9s3920soaumh73klnhs5.org. 86184 IN RRSIG NSEC3 7 2 86400 20160530150327 20160509140327 52860 org. I/Aa7E+iKFaeez8Tt65npGcQMqqGB8sJkdQzZdCvH3UHsChq3aJ7ksd6 aJh+lbvxqbB9XHtLKF7NY4i3Vcr5l5/jc4N9UysrGY3zJ3Q3VeUk6X6G ireOcEdCQ7MFVS0Zw+6rW7S5Via8va0nQj57HJs5n4YIy7SYZURixJI0 j5A=
When I query with +dnssec again, it doubles. I think this was introduced with the wildcard non-existence proof patch.
$ kdig @127.0.0.1 -p 6667 A notexists.org +dnssec
...
;; AUTHORITY SECTION:
org. 631 IN SOA a0.org.afilias-nst.info. noc.afilias-nst.info. 2011985870 1800 900 604800 86400
org. 631 IN RRSIG SOA 7 1 900 20160531233745 20160510223745 52860 org. LbwYB0WF9A1e3+t+OAqbrBArFGqoXXHsTN3MCzT5AM0rALYqc4+5dL1F MPgMTsTr5SqHgptPrbIwzumUdmJ9aFwBOXfFvATSrZr7k6lixTnx++zq Wv9P51ggVPb060Jdjb5yXwHpGXuqFsJ/Zvh0TVvkT5qmNKOvobaMel7+ cYc=
h9p7u7tr2u91d0v0ljs9l1gidnp90u3h.org. 86131 IN NSEC3 1 1 1 D399EAAB H9PARR669T6U8O1GSG9E1LMITK4DEM0T NS SOA RRSIG DNSKEY NSEC3PARAM
h9p7u7tr2u91d0v0ljs9l1gidnp90u3h.org. 86131 IN RRSIG NSEC3 7 2 86400 20160531233745 20160510223745 52860 org. VRmFqGWjHW21CSn8LS0XcqhDvdvNzS88//QOSNJXYB8IQXpi6w5PyzEr 1IRsZ7akeeGA8oFuIIosnnbkHHATNcFKIIZiDhfqlqUciYoQolxonu6K /d5+yX8l3DSU4ezpzZQr/SrkO1sNitzezDihgsxhXBFpd7+dwYqErKkh WzI=
sgkmag4eddlk9u0gdg4rijrgaablvuce.org. 86131 IN NSEC3 1 1 1 D399EAAB SGL6846A77U7AF5TJ7UL5GHNNP64MF8L
sgkmag4eddlk9u0gdg4rijrgaablvuce.org. 86131 IN RRSIG NSEC3 7 2 86400 20160530150327 20160509140327 52860 org. 1WpIKnpy0/rdrK9zNxKAYHvqdSGphjX1HFl9+TAFN1gqOPfErGGz6vPP YHuFDrSrfcziUw+Mu7udX/He9UHRMntV07w2TnNlOntJIG74dHDWo919 f1ZM0ZVXNQFEFOdFwnJM/wF6z75mpSSPekbNvHpBHfHYWTDs7LCuBTt0 bPg=
vaittv1g2ies9s3920soaumh73klnhs5.org. 86131 IN NSEC3 1 1 1 D399EAAB VAJSHJ9G9U88NEFMNIS1LOG48CM6L9LO NS DS RRSIG
vaittv1g2ies9s3920soaumh73klnhs5.org. 86131 IN RRSIG NSEC3 7 2 86400 20160530150327 20160509140327 52860 org. I/Aa7E+iKFaeez8Tt65npGcQMqqGB8sJkdQzZdCvH3UHsChq3aJ7ksd6 aJh+lbvxqbB9XHtLKF7NY4i3Vcr5l5/jc4N9UysrGY3zJ3Q3VeUk6X6G ireOcEdCQ7MFVS0Zw+6rW7S5Via8va0nQj57HJs5n4YIy7SYZURixJI0 j5A=
org. 631 IN SOA a0.org.afilias-nst.info. noc.afilias-nst.info. 2011985870 1800 900 604800 86400
org. 631 IN RRSIG SOA 7 1 900 20160531233745 20160510223745 52860 org. LbwYB0WF9A1e3+t+OAqbrBArFGqoXXHsTN3MCzT5AM0rALYqc4+5dL1F MPgMTsTr5SqHgptPrbIwzumUdmJ9aFwBOXfFvATSrZr7k6lixTnx++zq Wv9P51ggVPb060Jdjb5yXwHpGXuqFsJ/Zvh0TVvkT5qmNKOvobaMel7+ cYc=
h9p7u7tr2u91d0v0ljs9l1gidnp90u3h.org. 86131 IN NSEC3 1 1 1 D399EAAB H9PARR669T6U8O1GSG9E1LMITK4DEM0T NS SOA RRSIG DNSKEY NSEC3PARAM
h9p7u7tr2u91d0v0ljs9l1gidnp90u3h.org. 86131 IN RRSIG NSEC3 7 2 86400 20160531233745 20160510223745 52860 org. VRmFqGWjHW21CSn8LS0XcqhDvdvNzS88//QOSNJXYB8IQXpi6w5PyzEr 1IRsZ7akeeGA8oFuIIosnnbkHHATNcFKIIZiDhfqlqUciYoQolxonu6K /d5+yX8l3DSU4ezpzZQr/SrkO1sNitzezDihgsxhXBFpd7+dwYqErKkh WzI=
sgkmag4eddlk9u0gdg4rijrgaablvuce.org. 86131 IN NSEC3 1 1 1 D399EAAB SGL6846A77U7AF5TJ7UL5GHNNP64MF8L
sgkmag4eddlk9u0gdg4rijrgaablvuce.org. 86131 IN RRSIG NSEC3 7 2 86400 20160530150327 20160509140327 52860 org. 1WpIKnpy0/rdrK9zNxKAYHvqdSGphjX1HFl9+TAFN1gqOPfErGGz6vPP YHuFDrSrfcziUw+Mu7udX/He9UHRMntV07w2TnNlOntJIG74dHDWo919 f1ZM0ZVXNQFEFOdFwnJM/wF6z75mpSSPekbNvHpBHfHYWTDs7LCuBTt0 bPg=
vaittv1g2ies9s3920soaumh73klnhs5.org. 86131 IN NSEC3 1 1 1 D399EAAB VAJSHJ9G9U88NEFMNIS1LOG48CM6L9LO NS DS RRSIG
vaittv1g2ies9s3920soaumh73klnhs5.org. 86131 IN RRSIG NSEC3 7 2 86400 20160530150327 20160509140327 52860 org. I/Aa7E+iKFaeez8Tt65npGcQMqqGB8sJkdQzZdCvH3UHsChq3aJ7ksd6 aJh+lbvxqbB9XHtLKF7NY4i3Vcr5l5/jc4N9UysrGY3zJ3Q3VeUk6X6G ireOcEdCQ7MFVS0Zw+6rW7S5Via8va0nQj57HJs5n4YIy7SYZURixJI0 j5A=