VecSeq (as produced by (seq (vector-of :int 1 2 3))) does not implement interface IObj, whereas (seq [1 2 3]) does.
Proposed: Make VecSeq implement IObj.
Screened by: Alex Miller. I looked for cases in the wild of anyone relying on the internal `->VecSeq` or `VecSeq.` deftype constructor that could be broken by adding a field and did not find any (I don't think we'd consider that a public api but thought it was worth a check.)
is related, in that it is also regarding the class VecSeq not implementing some methods that seqs of normal vectors do.
Attached a proposed patch that makes class VecSeq implement interfaces IObj and IMeta, behaving similarly to how class PersistentVector$ChunkedSeq does.