PANIC "mergeClasses: classes have differing kinds" in my Hashtable first cut

[blackh]

[1 of 1] Compiling Hashtable
ddc: PANIC in Type.Squid.Class
        mergeClasses: classes have differing kinds
            cids = [720, 721]
            ks   = [*, * -> *]
        
        Please report this bug to the maintainers at:
            http://trac.haskell.org/ddc
            or by emailing disciple-cafe@googlegroups.com

[benl]

Changing the hashtable function to the following works. The original version missed the value to initialise the array elements [] in this case.

hashtable_new :: (k -> Int) -> Int -> Hashtable k v
hashtable_new hash capacity = Hashtable hash (array_new capacity [])

However, the following gives the same error message:

hashtable_new :: (k -> Int) -> Int -> Hashtable k v
hashtable_new hash capacity = Hashtable hash (new&{Array} capacity [])

So it looks like the projection new&{Array} isn't being managed properly.