*print-dup* and subvec

[Carson]

In Clojure 1.2, I tried this:

(read-string
    (binding [*print-dup* true]
        (print-str (subvec [1 2 3] 1))))

But I get a java.lang.IllegalArgumentException: No matching method found: create

I had something else print-dup'ed out onto disk and when I read it back in it gave me that error.  I just search and replaced clojure.lang.APersistentVector$SubVector/create with vec in the file and then it was okay, I guess.

What's going on?

Thanks,
Carson

[Stuart Sierra]

`print-dup` on any collection type generates code to call the `create` method of the collection's class.  `APersistentVector$SubVector` is missing a `create` method.

-Stuart Sierra

clojure.com

[Carson]

Thanks Stuart.  Is that a bug that will be fixed in 1.3?  I was under the impression that we can rely on print-dup for serialization.  Am I wrong about that?

Carson

[Stuart Sierra]

It's a bug: I just created CLJ-761.

In general, print-dup should work for serialization, but there are cases where it doesn't work: defrecords, for example, though that may be fixed in the next release.

-Stuart Sierra

clojure.com