Here are two ideas. 1) You simply have an old use of the original net/url. When #<url> is printed, it uses the symbolic name and you can't really figure out what the underlying code came from. I would do a grep to make sure this is not the case.
2) You are using namespaces somewhere and actually have two instances of the same module somewhere where a value produced by copy 1 is going to copy 2. This is possible with the Web server if you don't set up the servlet namespace properly: http://docs.racket-lang.org/web-server-internal/dispatch-servlets.html#(part._namespace) On Wed, Oct 23, 2013 at 4:25 PM, Erik Pearson <e...@adaptations.com> wrote: > Excuse my poor experience with contracts, this is probably an easy one. > > I'm using a copy of net/url and have a strange problem. The copied library > is working fine in general, but this problem cropped up today: > > struct:exn:fail:contract:blame url-port: contract violation > expected: url? > given: #<url> > in: the 1st argument of > (-> url? (or/c #f number?)) > contract from: > /home/epearson/work/racket/github/adaptnet/url-structs.rkt > blaming: /home/epearson/work/racket/github/racqueb/httpc.rkt > at: /home/epearson/work/racket/github/adaptnet/url-structs.rkt:4.28 > > The error is thrown in my usage of url-port which is being passed a > perfectly good url struct object. The file is requiring the copied > url-structs. If I play with the function that is being blamed in httpc.rkt > via the repl in dr racket, this specific error is not thrown. The call to > (url-port url) succeeds without throwing this contract exception. > > From my primitive understanding, I'm flummoxed: Why is a #<url> not a url? > > I suspected that there may have been a leftover require of net/url confusing > things, but I can't find any in my code. > > Using racket head from github 5.90.0.9--2013-10-20(d6610289/d) > > Help! > > Thanks, > Erik. > > > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > -- Jay McCarthy <j...@cs.byu.edu> Assistant Professor / Brigham Young University http://faculty.cs.byu.edu/~jay "The glory of God is Intelligence" - D&C 93 ____________________ Racket Users list: http://lists.racket-lang.org/users
