Metadata isn't being preserved on conj

[djblue]

In jank:

% ./build/jank repl
Bottom of clojure.core
clojure.core=> (meta ^:meta {})
{:meta true}
clojure.core=> (meta (conj ^:meta {} [:k :v]))
nil
clojure.core=> 

In clj:

% clj
Clojure 1.12.0
user=> (meta ^:meta {})
{:meta true}
user=> (meta (conj ^:meta {} [:k :v]))
{:meta true}
user=> 

I haven't investigated further, but this might apply to other operations and collection types.

[jeaye]

Yep, you're right about this. Meta preservation is likely missing in a lot of places, since metadata was implemented pretty late. We do have all of the behaviors for it now, though. Just need to identify where it's needed.