Parser does not recognize namespaced attributes

[ostinelli]

When I try to parse a <stream> element, the parser does not understand the difference between namespaced attributes.

1> {ok, Parser} = exml_stream:new_parser().
{ok,{parser,<<>>,[]}}
2> {ok, _, _} = exml_stream:parse(Parser, <<"<?xml version='1.0'?><stream:stream from='juliet@im.example.com' to='im.example.com' version='1.0' xml:lang='en' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'>">>).
{ok,{parser,<<>>,
            [{xmlelement,<<"stream:stream">>,
                         [{<<"xmlns:stream">>,<<"http://etherx.jabber.org/streams">>},
                          {<<"from">>,<<"juliet@im.example.com">>},
                          {<<"to">>,<<"im.example.com">>},
                          {<<"version">>,<<"1.0">>},
                          {<<"xml:lang">>,<<"en">>}],
                         []}]},
    [{xmlstreamstart,<<"stream:stream">>,
                     [{<<"xmlns:stream">>,<<"http://etherx.jabber.org/streams">>},
                      {<<"from">>,<<"juliet@im.example.com">>},
                      {<<"to">>,<<"im.example.com">>},
                      {<<"version">>,<<"1.0">>},
                      {<<"xml:lang">>,<<"en">>}]}]}
3> {ok, Parser2} = exml_stream:new_parser().
{ok,{parser,<<>>,[]}}
4> {ok, _, _} = exml_stream:parse(Parser2, <<"<?xml version='1.0'?><stream:stream xmlns:stream='http://etherx.jabber.org/streams' from='juliet@im.example.com' to='im.example.com' version='1.0' xml:lang='en' xmlns='jabber:client'>">>).
{ok,{parser,<<>>,
            [{xmlelement,<<"stream:stream">>,
                         [{<<"xmlns">>,<<"jabber:client">>},
                          {<<"from">>,<<"juliet@im.example.com">>},
                          {<<"to">>,<<"im.example.com">>},
                          {<<"version">>,<<"1.0">>},
                          {<<"xml:lang">>,<<"en">>}],
                         []}]},
    [{xmlstreamstart,<<"stream:stream">>,
                     [{<<"xmlns">>,<<"jabber:client">>},
                      {<<"from">>,<<"juliet@im.example.com">>},
                      {<<"to">>,<<"im.example.com">>},
                      {<<"version">>,<<"1.0">>},
                      {<<"xml:lang">>,<<"en">>}]}]}

In the first parser, the xml has the xmlns attribute first and the xmlns:stream attribute second. As you can see, the result only includes the second attribute xmlns:stream.

In the second parser, the xml has the xmlns:stream attribute first and the xmlns attribute second. As you can see, the result only includes the second attribute xmlns.

Desired: both attributes should be kept, as per the XMPP protocol.

[keynslug]

I would mention that I do not observe beforementioned issue on the current master.

Should it be closed, so as to stop people from trying out this project on their own? The issue sounds pretty rough.