Question about to-be-closed methods

[Dibyendu Majumdar <mobile@...>]

Hi,

I am trying to understand this test case in 'locals.lua'

  local x = 0
  local y = 0
  co = coroutine.wrap(function ()
    local xx <close> = func2close(function () y = y + 1; error("YYY") end)
    local xv <close> = func2close(function () x = x + 1; error("XXX") end)
      coroutine.yield(100)
      return 200
  end)
  assert(co() == 100); assert(x == 0)
  local st, msg = pcall(co)
  assert(x == 2 and y == 1)   -- first close is called twice

My question is this:

Why is the 'first close is called twice'?

Thanks and Regards
Dibyendu