literal bracket tuple as argument to function

gistfile1.txt

$ janet
Janet 1.35.2-771956b5 linux/x64/gcc - '(doc)' for help

repl:1:> (disasm (fn [] (printf "%j" [:a])))

{:arity 0
 :bytecode @[(ldc 0 0) (ldc 1 1) (push2 0 1) (ldc 0 2) (tcall 0)]
 :constants @["%j" (:a) <cfunction printf>]
 :defs @[]
 :environments @[]
 :max-arity 0
 :min-arity 0
 :slotcount 2
 :source "repl"
 :sourcemap @[(1 16) (1 16) (1 16) (1 16) (1 16)]
 :structarg false
 :vararg false}