[tor-bugs] #17494 [Tor Messenger]: "Unknown error" reported by Tor Messenger without further info

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#17494: "Unknown error" reported by Tor Messenger without further info
---------------------------+---------------------
 Reporter:  blaisorblade   |          Owner:
     Type:  defect         |         Status:  new
 Priority:  Medium         |      Milestone:
Component:  Tor Messenger  |        Version:
 Severity:  Normal         |     Resolution:
 Keywords:                 |  Actual Points:
Parent ID:                 |         Points:
  Sponsor:                 |
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Comment (by arlolra):

 Thanks for reporting. Indeed, the error message is unhelpful. It comes
 from,
 https://github.com/mozilla/releases-comm-
 central/blob/master/chat/protocols/xmpp/xmpp.jsm#L686

 The stanza we're returned is,
 {{{
 <message xmlns="jabber:client" id="..." type="error"
 to="... at jabber.calyxinstitute.org/Instantbird"
 from="... at jabber.calyxinstitute.org">
  <error xmlns="jabber:client" type="cancel">
   <service-unavailable xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/>
  </error>
 </message>
 }}}

 The only condition Instantbird provides a useful message for is `"remote-
 server-not-found"`.

 I'll add this case and maybe others from,
 http://xmpp.org/extensions/xep-0086.html#sect-idp772960

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17494#comment:2>
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