1 files changed, 5 insertions, 0 deletions

diff --git a/testes/coroutine.lua b/testes/coroutine.lua
index 02536ee5..4881d964 100644
--- a/testes/coroutine.lua
+++ b/testes/coroutine.lua
@@ -158,6 +158,11 @@ do
 
   local main = coroutine.running()
 
+  -- cannot close 'main'
+  local st, msg = pcall(coroutine.close, main);
+  assert(not st and string.find(msg, "main"))
+
+
   -- cannot close a "normal" coroutine
   ;(coroutine.wrap(function ()
     local st, msg = pcall(coroutine.close, main)