[issue22696] Add a function to know about interpreter shutdown

[STINNER Victor]

STINNER Victor added the comment:

> After solving this issue we should reconsider the traceback_ignore_linecache_error.patch patch in issue22599.

I reposted the patch in this issue since I just closed the issue #22599.

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Added file: http://bugs.python.org/file37365/traceback_ignore_linecache_error.patch

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<http://bugs.python.org/issue22696>
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