Does executing a Luau function implicitly create a reference to it while it's executing?

[Ono-Sendai]

Consider this Luau code:

local timer_handle = nil		
function onTimerEvent(ob : Object)
    print('onTimerEvent')						
    destroyTimer(timer_handle)		--Destroy the timer!
end		
timer_handle = createTimer(onTimerEvent, 0.1, false)	

In my C++ code I create a reference to onTimerEvent (the first argument to createTimer) in createTimer using lua_ref, to prevent it from being garbage-collected.

Later onTimerEvent is called from C++ code. While it is being executed, it then calls the C++ function destroyTimer, which releases the reference to onTimerEvent with lua_unref.

Is there an implicit reference to onTimerEvent while it is being called (e.g. while on the Lua call stack?)
Or is it in danger of being garbage-collected?

[vegorov-rbx]

There is an implicit reference on the thread's call stack which will ensure that function is not collected before it is completed.
So it's safe.

[Ono-Sendai]

great, thank you.