Comment 2 for bug 446490

Also an auth-related HTTP 500, but perhaps not for unknwon OAuth token:

ServerError: (500, ('unknown_error', 'badarg'))

Badarg error in HTTP request

Stacktrace:
[{erlang,list_to_binary,[undefined]},
             {couch_httpd_oauth,set_user_ctx,2},
             {couch_httpd,authenticate_request,2},
             {couch_httpd,handle_request,5},
             {mochiweb_http,headers,5},
             {proc_lib,init_p_do_apply,3}]

httpd 500 error response:
 {darg error in HTTP request"error":"unknown_error","reason":"badarg"}