From: Aredridel <aredridel@...>
Date: 2006-06-12T05:37:12+09:00
Subject: Re: Validity of local VALUEs

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[snip]
> I would expect this to crash, but it doesn't. Looking at the object
> counts returned by ObjectSpace.each_object, I can see that several gc
> cycles are taking place. However, an_object is still valid by the end
> of the function. Is this working "by chance"? From the observation
> that I don't have 100000 array objects in the ObjectSpace after
> calling rb_ary_new 100000 times, I gather that VALUEs do not remain
> valid until the end of the function without being bound somewhere.
> However, my calls to an_object are still returning the correct value.

They are indeed bound somewhere: the stack. The Garbage Collector scans
the C stack (somewhat conservatively) for objects to mark as used.

Aria

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