[issue15528] Better support for finalization with weakrefs

[Richard Oudkerk]

Richard Oudkerk added the comment:

On 14/02/2013 3:16pm, Antoine Pitrou wrote:
> Mmmh... thread switching is already blocked at shutdown:
> http://hg.python.org/cpython/file/0f827775f7b7/Python/ceval.c#l434

But in Py_Finalize(), call_py_exitfuncs() is called *before* _Py_Finalizing is set to a non-NULL value.

    http://hg.python.org/cpython/file/0f827775f7b7/Python/pythonrun.c#l492

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<http://bugs.python.org/issue15528>
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