nCcalls in the global state keeps increasing in 5.2

[Markus Schmid <willhelm.schmid@...>]

I have an event based system where each call into Lua is done by 
creating a new coroutine. The problem is that the variable nCcalls in 
the global state slowly but steadily keeps increasing until it reaches 
the maximum of 200. This happens in a production environment and I am 
unable to recreate the problem in my lab. Do you have any idea what 
could cause nCcalls to increase i.e. be unbalanced?

I am using the latest Lua 5.2

-Will