Thank you, that make sence. :) I have a real world bug related this, it is troubled me for long time, please give me some hints if possible.
The real world program like this: I have an big ref object named as BigObj, which I pass to several children thread with pointer, because I don't want it is to be copied. The BigObj is readonly both in main thread and children thread, and main thread will wait till all children thread finish there job. Now the problem comes, in the child thread, If I use closure to access the BigObj, after some iteration, the BigObj is freeed(The inner data changed so I think the only possible reason is it be freeed); if I use template, the program works fine. If I use the closure and add an GC_Ref(BigObj) call, the program works fine too. So, what is possible reason for this?
