Turn potential malicious-crafted code crashes into normal Lua errors

* bump version to 3.8.1
* new function lane:get_debug_threadname()
* Fix invalid memory accesses when fetching the name of a joined lane
with lanes:threads() (because its lua_State is closed)
* use luaL_newmetatable() to create the metatable for lane objects
* prevent malicious code from crashing by calling lane methods without
passing the lane as first argument (raise an error instead)
* set_debug_threadname() is no longer registered in the function lookup
databases because it holds a C pointer as upvalue and it might crash if
used maliciously

1 files changed, 7 insertions, 2 deletions

diff --git a/tests/basic.lua b/tests/basic.lua
index 1f4eb1e..5b0d8a7 100644
--- a/tests/basic.lua
+++ b/tests/basic.lua
@@ -413,6 +413,8 @@ PRINT( "\n\n", "---=== :join test ===---", "\n\n")
 
 local S= lanes_gen( "table",
   function(arg)
+                set_debug_threadname "join test lane"
+                set_finalizer( function() end)
     aux= {}
     for i, v in ipairs(arg) do
            table.insert (aux, 1, v)
@@ -422,11 +424,14 @@ local S= lanes_gen( "table",
 end )
 
 h= S { 12, 13, 14 }     -- execution starts, h[1..3] will get the return values
-
+-- wait a bit so that the lane hasa chance to set its debug name
+linda:receive(0.5, "gloupti")
+print( "joining with '" .. h:get_debug_threadname() .. "'")
 local a,b,c,d= h:join()
 if h.status == "error" then
-        print( "h error: " , a, b, c, d)
+        print( h:get_debug_threadname(), "error: " , a, b, c, d)
 else
+        print( h:get_debug_threadname(), a,b,c,d)
         assert(a==14)
         assert(b==13)
         assert(c==12)