Re: 5.2 _ENV garbage collection question

[Gaspard Bucher <gaspard@...>]

On Mon, Jun 27, 2011 at 11:29 AM, Jerome Vuarand <jerome.vuarand@gmail.com> wrote:

2011/6/27 steve donovan <steve.j.donovan@gmail.com>:

> On Mon, Jun 27, 2011 at 11:08 AM, Gaspard Bucher <gaspard@teti.ch> wrote:
>> collectgarbage() ---- does not collect old "foo". Why ? Where is it stored ?
>> print('end') -- the garbage collection after 'end' removes old "foo".
>
> It's still there, as a global of the original environment.

But the original environment is unreachable (except by the gc_mt.__gc
function itself), and it should be collected.

Yes, this was my concern: I thought the original _ENV was unreachable but it is not: since "foo" is not garbage collected, it must be reachable from somewhere (which means the original _ENV is also reachable). Therefore, the question is from where is old _ENV reachable and why ?

Gaspard