Does not work LState.Close() after os.Exit()

[kohkimakimoto]

Hello yuin.

defer doesn't run when you use os.Exit() to terminate a process.
Therefore, LState.Close() doesn't run in some cases.

This behavior causes an issue. For instance. A temporary file that is created by io.tmpfile() is not deleted automatically by using glua. Please see the following steps.

Create test.lua

-- test.lua
local t = io.tmpfile()
t:write("This is a tempfile.")

Run the test.lua file by glua.

glua test.lua

Look for the file. At my environment(OSX 10.10.4), the temporary file generated under the /var/folders/bt/xwh9qmcj00dctz53_rxclgtr0000gn/T. It is not deleted.

ls -ltr /var/folders/bt/xwh9qmcj00dctz53_rxclgtr0000gn/T

...
-rw-------   1 kohkimakimoto  staff       6  8 19 13:41 311400111
-rw-------   1 kohkimakimoto  staff       6  8 19 13:42 445911440
-rw-------   1 kohkimakimoto  staff       6  8 19 13:44 305149766
-rw-------   1 kohkimakimoto  staff       6  8 19 13:45 960108122
-rw-------   1 kohkimakimoto  staff       6  8 19 13:45 607108666
-rw-------   1 kohkimakimoto  staff       6  8 19 13:45 731094900
-rw-------   1 kohkimakimoto  staff       6  8 19 13:45 166451425
-rw-------   1 kohkimakimoto  staff       8  8 19 13:48 977724667
-rw-r--r--   1 kohkimakimoto  staff     132  8 19 18:53 lsuseractivityd.log
drwx------@  3 kohkimakimoto  staff     102  8 19 19:59 com.apple.mail
drwx------@  2 kohkimakimoto  staff      68  8 20 06:08 com.apple.corerecents.recentsd
-rw-------   1 kohkimakimoto  staff    4011  8 20 06:12 xcrun_db
drwxr-xr-x   2 kohkimakimoto  staff      68  8 20 06:24 TemporaryItems
-rw-------   1 kohkimakimoto  staff      19  8 20 07:39 440567778

cat 440567778
This is a tempfile.