696 lines
18 KiB
Lua
696 lines
18 KiB
Lua
-- $Id: testes/gc.lua $
|
|
-- See Copyright Notice in file all.lua
|
|
|
|
print('testing incremental garbage collection')
|
|
|
|
local debug = require"debug"
|
|
|
|
assert(collectgarbage("isrunning"))
|
|
|
|
collectgarbage()
|
|
|
|
local oldmode = collectgarbage("incremental")
|
|
|
|
-- changing modes should return previous mode
|
|
assert(collectgarbage("generational") == "incremental")
|
|
assert(collectgarbage("generational") == "generational")
|
|
assert(collectgarbage("incremental") == "generational")
|
|
assert(collectgarbage("incremental") == "incremental")
|
|
|
|
|
|
local function nop () end
|
|
|
|
local function gcinfo ()
|
|
return collectgarbage"count" * 1024
|
|
end
|
|
|
|
|
|
-- test weird parameters to 'collectgarbage'
|
|
do
|
|
-- save original parameters
|
|
local a = collectgarbage("setpause", 200)
|
|
local b = collectgarbage("setstepmul", 200)
|
|
local t = {0, 2, 10, 90, 500, 5000, 30000, 0x7ffffffe}
|
|
for i = 1, #t do
|
|
local p = t[i]
|
|
for j = 1, #t do
|
|
local m = t[j]
|
|
collectgarbage("setpause", p)
|
|
collectgarbage("setstepmul", m)
|
|
collectgarbage("step", 0)
|
|
collectgarbage("step", 10000)
|
|
end
|
|
end
|
|
-- restore original parameters
|
|
collectgarbage("setpause", a)
|
|
collectgarbage("setstepmul", b)
|
|
collectgarbage()
|
|
end
|
|
|
|
|
|
_G["while"] = 234
|
|
|
|
|
|
--
|
|
-- tests for GC activation when creating different kinds of objects
|
|
--
|
|
local function GC1 ()
|
|
local u
|
|
local b -- (above 'u' it in the stack)
|
|
local finish = false
|
|
u = setmetatable({}, {__gc = function () finish = true end})
|
|
b = {34}
|
|
repeat u = {} until finish
|
|
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
|
|
|
|
finish = false; local i = 1
|
|
u = setmetatable({}, {__gc = function () finish = true end})
|
|
repeat i = i + 1; u = tostring(i) .. tostring(i) until finish
|
|
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
|
|
|
|
finish = false
|
|
u = setmetatable({}, {__gc = function () finish = true end})
|
|
repeat local i; u = function () return i end until finish
|
|
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
|
|
end
|
|
|
|
local function GC2 ()
|
|
local u
|
|
local finish = false
|
|
u = {setmetatable({}, {__gc = function () finish = true end})}
|
|
local b = {34}
|
|
repeat u = {{}} until finish
|
|
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
|
|
|
|
finish = false; local i = 1
|
|
u = {setmetatable({}, {__gc = function () finish = true end})}
|
|
repeat i = i + 1; u = {tostring(i) .. tostring(i)} until finish
|
|
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
|
|
|
|
finish = false
|
|
u = {setmetatable({}, {__gc = function () finish = true end})}
|
|
repeat local i; u = {function () return i end} until finish
|
|
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
|
|
end
|
|
|
|
local function GC() GC1(); GC2() end
|
|
|
|
|
|
do
|
|
print("creating many objects")
|
|
|
|
local limit = 5000
|
|
|
|
for i = 1, limit do
|
|
local a = {}; a = nil
|
|
end
|
|
|
|
local a = "a"
|
|
|
|
for i = 1, limit do
|
|
a = i .. "b";
|
|
a = string.gsub(a, '(%d%d*)', "%1 %1")
|
|
a = "a"
|
|
end
|
|
|
|
|
|
|
|
a = {}
|
|
|
|
function a:test ()
|
|
for i = 1, limit do
|
|
load(string.format("function temp(a) return 'a%d' end", i), "")()
|
|
assert(temp() == string.format('a%d', i))
|
|
end
|
|
end
|
|
|
|
a:test()
|
|
_G.temp = nil
|
|
end
|
|
|
|
|
|
-- collection of functions without locals, globals, etc.
|
|
do local f = function () end end
|
|
|
|
|
|
print("functions with errors")
|
|
local prog = [[
|
|
do
|
|
a = 10;
|
|
function foo(x,y)
|
|
a = sin(a+0.456-0.23e-12);
|
|
return function (z) return sin(%x+z) end
|
|
end
|
|
local x = function (w) a=a+w; end
|
|
end
|
|
]]
|
|
do
|
|
local step = 1
|
|
if _soft then step = 13 end
|
|
for i=1, string.len(prog), step do
|
|
for j=i, string.len(prog), step do
|
|
pcall(load(string.sub(prog, i, j), ""))
|
|
end
|
|
end
|
|
end
|
|
rawset(_G, "a", nil)
|
|
_G.x = nil
|
|
|
|
do
|
|
foo = nil
|
|
print('long strings')
|
|
local x = "01234567890123456789012345678901234567890123456789012345678901234567890123456789"
|
|
assert(string.len(x)==80)
|
|
local s = ''
|
|
local k = math.min(300, (math.maxinteger // 80) // 2)
|
|
for n = 1, k do s = s..x; local j=tostring(n) end
|
|
assert(string.len(s) == k*80)
|
|
s = string.sub(s, 1, 10000)
|
|
local s, i = string.gsub(s, '(%d%d%d%d)', '')
|
|
assert(i==10000 // 4)
|
|
|
|
assert(_G["while"] == 234)
|
|
_G["while"] = nil
|
|
end
|
|
|
|
|
|
--
|
|
-- test the "size" of basic GC steps (whatever they mean...)
|
|
--
|
|
do
|
|
print("steps")
|
|
|
|
print("steps (2)")
|
|
|
|
local function dosteps (siz)
|
|
collectgarbage()
|
|
local a = {}
|
|
for i=1,100 do a[i] = {{}}; local b = {} end
|
|
local x = gcinfo()
|
|
local i = 0
|
|
repeat -- do steps until it completes a collection cycle
|
|
i = i+1
|
|
until collectgarbage("step", siz)
|
|
assert(gcinfo() < x)
|
|
return i -- number of steps
|
|
end
|
|
|
|
collectgarbage"stop"
|
|
|
|
if not _port then
|
|
assert(dosteps(10) < dosteps(2))
|
|
end
|
|
|
|
-- collector should do a full collection with so many steps
|
|
assert(dosteps(20000) == 1)
|
|
assert(collectgarbage("step", 20000) == true)
|
|
assert(collectgarbage("step", 20000) == true)
|
|
|
|
assert(not collectgarbage("isrunning"))
|
|
collectgarbage"restart"
|
|
assert(collectgarbage("isrunning"))
|
|
|
|
end
|
|
|
|
|
|
if not _port then
|
|
-- test the pace of the collector
|
|
collectgarbage(); collectgarbage()
|
|
local x = gcinfo()
|
|
collectgarbage"stop"
|
|
repeat
|
|
local a = {}
|
|
until gcinfo() > 3 * x
|
|
collectgarbage"restart"
|
|
assert(collectgarbage("isrunning"))
|
|
repeat
|
|
local a = {}
|
|
until gcinfo() <= x * 2
|
|
end
|
|
|
|
|
|
print("clearing tables")
|
|
local lim = 15
|
|
local a = {}
|
|
-- fill a with `collectable' indices
|
|
for i=1,lim do a[{}] = i end
|
|
b = {}
|
|
for k,v in pairs(a) do b[k]=v end
|
|
-- remove all indices and collect them
|
|
for n in pairs(b) do
|
|
a[n] = undef
|
|
assert(type(n) == 'table' and next(n) == nil)
|
|
collectgarbage()
|
|
end
|
|
b = nil
|
|
collectgarbage()
|
|
for n in pairs(a) do error'cannot be here' end
|
|
for i=1,lim do a[i] = i end
|
|
for i=1,lim do assert(a[i] == i) end
|
|
|
|
|
|
print('weak tables')
|
|
a = {}; setmetatable(a, {__mode = 'k'});
|
|
-- fill a with some `collectable' indices
|
|
for i=1,lim do a[{}] = i end
|
|
-- and some non-collectable ones
|
|
for i=1,lim do a[i] = i end
|
|
for i=1,lim do local s=string.rep('@', i); a[s] = s..'#' end
|
|
collectgarbage()
|
|
local i = 0
|
|
for k,v in pairs(a) do assert(k==v or k..'#'==v); i=i+1 end
|
|
assert(i == 2*lim)
|
|
|
|
a = {}; setmetatable(a, {__mode = 'v'});
|
|
a[1] = string.rep('b', 21)
|
|
collectgarbage()
|
|
assert(a[1]) -- strings are *values*
|
|
a[1] = undef
|
|
-- fill a with some `collectable' values (in both parts of the table)
|
|
for i=1,lim do a[i] = {} end
|
|
for i=1,lim do a[i..'x'] = {} end
|
|
-- and some non-collectable ones
|
|
for i=1,lim do local t={}; a[t]=t end
|
|
for i=1,lim do a[i+lim]=i..'x' end
|
|
collectgarbage()
|
|
local i = 0
|
|
for k,v in pairs(a) do assert(k==v or k-lim..'x' == v); i=i+1 end
|
|
assert(i == 2*lim)
|
|
|
|
a = {}; setmetatable(a, {__mode = 'kv'});
|
|
local x, y, z = {}, {}, {}
|
|
-- keep only some items
|
|
a[1], a[2], a[3] = x, y, z
|
|
a[string.rep('$', 11)] = string.rep('$', 11)
|
|
-- fill a with some `collectable' values
|
|
for i=4,lim do a[i] = {} end
|
|
for i=1,lim do a[{}] = i end
|
|
for i=1,lim do local t={}; a[t]=t end
|
|
collectgarbage()
|
|
assert(next(a) ~= nil)
|
|
local i = 0
|
|
for k,v in pairs(a) do
|
|
assert((k == 1 and v == x) or
|
|
(k == 2 and v == y) or
|
|
(k == 3 and v == z) or k==v);
|
|
i = i+1
|
|
end
|
|
assert(i == 4)
|
|
x,y,z=nil
|
|
collectgarbage()
|
|
assert(next(a) == string.rep('$', 11))
|
|
|
|
|
|
-- 'bug' in 5.1
|
|
a = {}
|
|
local t = {x = 10}
|
|
local C = setmetatable({key = t}, {__mode = 'v'})
|
|
local C1 = setmetatable({[t] = 1}, {__mode = 'k'})
|
|
a.x = t -- this should not prevent 't' from being removed from
|
|
-- weak table 'C' by the time 'a' is finalized
|
|
|
|
setmetatable(a, {__gc = function (u)
|
|
assert(C.key == nil)
|
|
assert(type(next(C1)) == 'table')
|
|
end})
|
|
|
|
a, t = nil
|
|
collectgarbage()
|
|
collectgarbage()
|
|
assert(next(C) == nil and next(C1) == nil)
|
|
C, C1 = nil
|
|
|
|
|
|
-- ephemerons
|
|
local mt = {__mode = 'k'}
|
|
a = {{10},{20},{30},{40}}; setmetatable(a, mt)
|
|
x = nil
|
|
for i = 1, 100 do local n = {}; a[n] = {k = {x}}; x = n end
|
|
GC()
|
|
local n = x
|
|
local i = 0
|
|
while n do n = a[n].k[1]; i = i + 1 end
|
|
assert(i == 100)
|
|
x = nil
|
|
GC()
|
|
for i = 1, 4 do assert(a[i][1] == i * 10); a[i] = undef end
|
|
assert(next(a) == nil)
|
|
|
|
local K = {}
|
|
a[K] = {}
|
|
for i=1,10 do a[K][i] = {}; a[a[K][i]] = setmetatable({}, mt) end
|
|
x = nil
|
|
local k = 1
|
|
for j = 1,100 do
|
|
local n = {}; local nk = k%10 + 1
|
|
a[a[K][nk]][n] = {x, k = k}; x = n; k = nk
|
|
end
|
|
GC()
|
|
local n = x
|
|
local i = 0
|
|
while n do local t = a[a[K][k]][n]; n = t[1]; k = t.k; i = i + 1 end
|
|
assert(i == 100)
|
|
K = nil
|
|
GC()
|
|
-- assert(next(a) == nil)
|
|
|
|
|
|
-- testing errors during GC
|
|
if T then
|
|
collectgarbage("stop") -- stop collection
|
|
local u = {}
|
|
local s = {}; setmetatable(s, {__mode = 'k'})
|
|
setmetatable(u, {__gc = function (o)
|
|
local i = s[o]
|
|
s[i] = true
|
|
assert(not s[i - 1]) -- check proper finalization order
|
|
if i == 8 then error("@expected@") end -- error during GC
|
|
end})
|
|
|
|
for i = 6, 10 do
|
|
local n = setmetatable({}, getmetatable(u))
|
|
s[n] = i
|
|
end
|
|
|
|
warn("@on"); warn("@store")
|
|
collectgarbage()
|
|
assert(string.find(_WARN, "error in __gc"))
|
|
assert(string.match(_WARN, "@(.-)@") == "expected"); _WARN = false
|
|
for i = 8, 10 do assert(s[i]) end
|
|
|
|
for i = 1, 5 do
|
|
local n = setmetatable({}, getmetatable(u))
|
|
s[n] = i
|
|
end
|
|
|
|
collectgarbage()
|
|
for i = 1, 10 do assert(s[i]) end
|
|
|
|
getmetatable(u).__gc = nil
|
|
warn("@normal")
|
|
|
|
end
|
|
print '+'
|
|
|
|
|
|
-- testing userdata
|
|
if T==nil then
|
|
(Message or print)('\n >>> testC not active: skipping userdata GC tests <<<\n')
|
|
|
|
else
|
|
|
|
local function newproxy(u)
|
|
return debug.setmetatable(T.newuserdata(0), debug.getmetatable(u))
|
|
end
|
|
|
|
collectgarbage("stop") -- stop collection
|
|
local u = newproxy(nil)
|
|
debug.setmetatable(u, {__gc = true})
|
|
local s = 0
|
|
local a = {[u] = 0}; setmetatable(a, {__mode = 'vk'})
|
|
for i=1,10 do a[newproxy(u)] = i end
|
|
for k in pairs(a) do assert(getmetatable(k) == getmetatable(u)) end
|
|
local a1 = {}; for k,v in pairs(a) do a1[k] = v end
|
|
for k,v in pairs(a1) do a[v] = k end
|
|
for i =1,10 do assert(a[i]) end
|
|
getmetatable(u).a = a1
|
|
getmetatable(u).u = u
|
|
do
|
|
local u = u
|
|
getmetatable(u).__gc = function (o)
|
|
assert(a[o] == 10-s)
|
|
assert(a[10-s] == undef) -- udata already removed from weak table
|
|
assert(getmetatable(o) == getmetatable(u))
|
|
assert(getmetatable(o).a[o] == 10-s)
|
|
s=s+1
|
|
end
|
|
end
|
|
a1, u = nil
|
|
assert(next(a) ~= nil)
|
|
collectgarbage()
|
|
assert(s==11)
|
|
collectgarbage()
|
|
assert(next(a) == nil) -- finalized keys are removed in two cycles
|
|
end
|
|
|
|
|
|
-- __gc x weak tables
|
|
local u = setmetatable({}, {__gc = true})
|
|
-- __gc metamethod should be collected before running
|
|
setmetatable(getmetatable(u), {__mode = "v"})
|
|
getmetatable(u).__gc = function (o) os.exit(1) end -- cannot happen
|
|
u = nil
|
|
collectgarbage()
|
|
|
|
local u = setmetatable({}, {__gc = true})
|
|
local m = getmetatable(u)
|
|
m.x = {[{0}] = 1; [0] = {1}}; setmetatable(m.x, {__mode = "kv"});
|
|
m.__gc = function (o)
|
|
assert(next(getmetatable(o).x) == nil)
|
|
m = 10
|
|
end
|
|
u, m = nil
|
|
collectgarbage()
|
|
assert(m==10)
|
|
|
|
do -- tests for string keys in weak tables
|
|
collectgarbage(); collectgarbage()
|
|
local m = collectgarbage("count") -- current memory
|
|
local a = setmetatable({}, {__mode = "kv"})
|
|
a[string.rep("a", 2^22)] = 25 -- long string key -> number value
|
|
a[string.rep("b", 2^22)] = {} -- long string key -> colectable value
|
|
a[{}] = 14 -- colectable key
|
|
assert(collectgarbage("count") > m + 2^13) -- 2^13 == 2 * 2^22 in KB
|
|
collectgarbage()
|
|
assert(collectgarbage("count") >= m + 2^12 and
|
|
collectgarbage("count") < m + 2^13) -- one key was collected
|
|
local k, v = next(a) -- string key with number value preserved
|
|
assert(k == string.rep("a", 2^22) and v == 25)
|
|
assert(next(a, k) == nil) -- everything else cleared
|
|
assert(a[string.rep("b", 2^22)] == undef)
|
|
a[k] = undef -- erase this last entry
|
|
k = nil
|
|
collectgarbage()
|
|
assert(next(a) == nil)
|
|
-- make sure will not try to compare with dead key
|
|
assert(a[string.rep("b", 100)] == undef)
|
|
assert(collectgarbage("count") <= m + 1) -- eveything collected
|
|
end
|
|
|
|
|
|
-- errors during collection
|
|
if T then
|
|
warn("@store")
|
|
u = setmetatable({}, {__gc = function () error "@expected error" end})
|
|
u = nil
|
|
collectgarbage()
|
|
assert(string.find(_WARN, "@expected error")); _WARN = false
|
|
warn("@normal")
|
|
end
|
|
|
|
|
|
if not _soft then
|
|
print("long list")
|
|
local a = {}
|
|
for i = 1,200000 do
|
|
a = {next = a}
|
|
end
|
|
a = nil
|
|
collectgarbage()
|
|
end
|
|
|
|
-- create many threads with self-references and open upvalues
|
|
print("self-referenced threads")
|
|
local thread_id = 0
|
|
local threads = {}
|
|
|
|
local function fn (thread)
|
|
local x = {}
|
|
threads[thread_id] = function()
|
|
thread = x
|
|
end
|
|
coroutine.yield()
|
|
end
|
|
|
|
while thread_id < 1000 do
|
|
local thread = coroutine.create(fn)
|
|
coroutine.resume(thread, thread)
|
|
thread_id = thread_id + 1
|
|
end
|
|
|
|
|
|
-- Create a closure (function inside 'f') with an upvalue ('param') that
|
|
-- points (through a table) to the closure itself and to the thread
|
|
-- ('co' and the initial value of 'param') where closure is running.
|
|
-- Then, assert that table (and therefore everything else) will be
|
|
-- collected.
|
|
do
|
|
local collected = false -- to detect collection
|
|
collectgarbage(); collectgarbage("stop")
|
|
do
|
|
local function f (param)
|
|
;(function ()
|
|
assert(type(f) == 'function' and type(param) == 'thread')
|
|
param = {param, f}
|
|
setmetatable(param, {__gc = function () collected = true end})
|
|
coroutine.yield(100)
|
|
end)()
|
|
end
|
|
local co = coroutine.create(f)
|
|
assert(coroutine.resume(co, co))
|
|
end
|
|
-- Now, thread and closure are not reacheable any more.
|
|
collectgarbage()
|
|
assert(collected)
|
|
collectgarbage("restart")
|
|
end
|
|
|
|
|
|
do
|
|
collectgarbage()
|
|
collectgarbage"stop"
|
|
collectgarbage("step", 0) -- steps should not unblock the collector
|
|
local x = gcinfo()
|
|
repeat
|
|
for i=1,1000 do _ENV.a = {} end -- no collection during the loop
|
|
until gcinfo() > 2 * x
|
|
collectgarbage"restart"
|
|
_ENV.a = nil
|
|
end
|
|
|
|
|
|
if T then -- tests for weird cases collecting upvalues
|
|
|
|
local function foo ()
|
|
local a = {x = 20}
|
|
coroutine.yield(function () return a.x end) -- will run collector
|
|
assert(a.x == 20) -- 'a' is 'ok'
|
|
a = {x = 30} -- create a new object
|
|
assert(T.gccolor(a) == "white") -- of course it is new...
|
|
coroutine.yield(100) -- 'a' is still local to this thread
|
|
end
|
|
|
|
local t = setmetatable({}, {__mode = "kv"})
|
|
collectgarbage(); collectgarbage('stop')
|
|
-- create coroutine in a weak table, so it will never be marked
|
|
t.co = coroutine.wrap(foo)
|
|
local f = t.co() -- create function to access local 'a'
|
|
T.gcstate("atomic") -- ensure all objects are traversed
|
|
assert(T.gcstate() == "atomic")
|
|
assert(t.co() == 100) -- resume coroutine, creating new table for 'a'
|
|
assert(T.gccolor(t.co) == "white") -- thread was not traversed
|
|
T.gcstate("pause") -- collect thread, but should mark 'a' before that
|
|
assert(t.co == nil and f() == 30) -- ensure correct access to 'a'
|
|
|
|
collectgarbage("restart")
|
|
|
|
-- test barrier in sweep phase (backing userdata to gray)
|
|
local u = T.newuserdata(0, 1) -- create a userdata
|
|
collectgarbage()
|
|
collectgarbage"stop"
|
|
local a = {} -- avoid 'u' as first element in 'allgc'
|
|
T.gcstate"atomic"
|
|
T.gcstate"sweepallgc"
|
|
local x = {}
|
|
assert(T.gccolor(u) == "black") -- userdata is "old" (black)
|
|
assert(T.gccolor(x) == "white") -- table is "new" (white)
|
|
debug.setuservalue(u, x) -- trigger barrier
|
|
assert(T.gccolor(u) == "gray") -- userdata changed back to gray
|
|
collectgarbage"restart"
|
|
|
|
print"+"
|
|
end
|
|
|
|
|
|
if T then
|
|
local debug = require "debug"
|
|
collectgarbage("stop")
|
|
local x = T.newuserdata(0)
|
|
local y = T.newuserdata(0)
|
|
debug.setmetatable(y, {__gc = nop}) -- bless the new udata before...
|
|
debug.setmetatable(x, {__gc = nop}) -- ...the old one
|
|
assert(T.gccolor(y) == "white")
|
|
T.checkmemory()
|
|
collectgarbage("restart")
|
|
end
|
|
|
|
|
|
if T then
|
|
print("emergency collections")
|
|
collectgarbage()
|
|
collectgarbage()
|
|
T.totalmem(T.totalmem() + 200)
|
|
for i=1,200 do local a = {} end
|
|
T.totalmem(0)
|
|
collectgarbage()
|
|
local t = T.totalmem("table")
|
|
local a = {{}, {}, {}} -- create 4 new tables
|
|
assert(T.totalmem("table") == t + 4)
|
|
t = T.totalmem("function")
|
|
a = function () end -- create 1 new closure
|
|
assert(T.totalmem("function") == t + 1)
|
|
t = T.totalmem("thread")
|
|
a = coroutine.create(function () end) -- create 1 new coroutine
|
|
assert(T.totalmem("thread") == t + 1)
|
|
end
|
|
|
|
|
|
-- create an object to be collected when state is closed
|
|
do
|
|
local setmetatable,assert,type,print,getmetatable =
|
|
setmetatable,assert,type,print,getmetatable
|
|
local tt = {}
|
|
tt.__gc = function (o)
|
|
assert(getmetatable(o) == tt)
|
|
-- create new objects during GC
|
|
local a = 'xuxu'..(10+3)..'joao', {}
|
|
___Glob = o -- ressurrect object!
|
|
setmetatable({}, tt) -- creates a new one with same metatable
|
|
print(">>> closing state " .. "<<<\n")
|
|
end
|
|
local u = setmetatable({}, tt)
|
|
___Glob = {u} -- avoid object being collected before program end
|
|
end
|
|
|
|
-- create several objects to raise errors when collected while closing state
|
|
if T then
|
|
local error, assert, find, warn = error, assert, string.find, warn
|
|
local n = 0
|
|
local lastmsg
|
|
local mt = {__gc = function (o)
|
|
n = n + 1
|
|
assert(n == o[1])
|
|
if n == 1 then
|
|
_WARN = false
|
|
elseif n == 2 then
|
|
assert(find(_WARN, "@expected warning"))
|
|
lastmsg = _WARN -- get message from previous error (first 'o')
|
|
else
|
|
assert(lastmsg == _WARN) -- subsequent error messages are equal
|
|
end
|
|
warn("@store"); _WARN = false
|
|
error"@expected warning"
|
|
end}
|
|
for i = 10, 1, -1 do
|
|
-- create object and preserve it until the end
|
|
table.insert(___Glob, setmetatable({i}, mt))
|
|
end
|
|
end
|
|
|
|
-- just to make sure
|
|
assert(collectgarbage'isrunning')
|
|
|
|
do -- check that the collector is not reentrant in incremental mode
|
|
local res = true
|
|
setmetatable({}, {__gc = function ()
|
|
res = collectgarbage()
|
|
end})
|
|
collectgarbage()
|
|
assert(not res)
|
|
end
|
|
|
|
|
|
collectgarbage(oldmode)
|
|
|
|
print('OK')
|