proc test(data: openArray[int]): proc() = 
  result = proc = 
    echo data

let a = @[1, 2, 3]

test(a)()

/home/dian/Projects/ircord/third.nim(9, 10) Error: 'data' is of type <openArray[int]> which cannot be captured as it would violate memory safety, declared here: /home/dian/Projects/ircord/third.nim(7, 11); using '-d:nimWorkaround14447' helps in some cases

import std/asyncdispatch

proc test(data: openArray[int]) {.async.} = 
  echo data

waitFor test(@[1, 2, 3])

/home/dian/Projects/ircord/third.nim(5, 8) Error: 'data' is of type <openArray[int]> which cannot be captured as it would violate memory safety, declared here: /home/dian/Projects/ircord/third.nim(4, 11); using '-d:nimWorkaround14447' helps in some cases

proc test(): int = 

  let other = proc() = 
    result = 5

discard test()

/home/dian/Projects/ircord/third.nim(4, 5) Error: 'result' is of type <int> which cannot be captured as it would violate memory safety, declared here: /home/dian/Projects/ircord/third.nim(1, 1); using '-d:nimWorkaround14447' helps in some cases