var
  thr: array[0..4, TThread[void]]

proc threadFunc() {.thread.} =
  echo("hi ")

for i in 0..high(thr):
  createThread(thr[i], threadFunc, void)
joinThreads(thr)

# minfail.nim(8, 14) Error: type mismatch: got (TThread[void], proc (){.thread.}, typedesc[empty])
# but expected one of:
# system.createThread(t: var TThread[TArg], tp: proc (TArg){.thread.}, param: TArg)