__mode="k"

[Nodir Temirhodzhaev <tnodir@...>]

Why in weak keyed table userdata's not autocollect?

---
local k = io.open("test", "w")
local w = setmetatable({[k] = 1}, {__mode = "k"})
k = nil; collectgarbage()
table.foreach(w, print)
---
Prints:
file (closed)  1

But if k is table or thread then prints nothing.