[issue7672] _ssl module causes segfault

[Martin v. Löwis]

Martin v. Löwis <martin at v.loewis.de> added the comment:

So how do you do cleanup on Linux, or on OSX, in a shared library?

I'd claim that the bug is in your application. It shouldn't unload a DLL that is still in use (by having a function pointer into it stored globally).

Testing for a prior pointer value may fix it for you. It won't fix it in the general case, i.e. when you unload the ssl module and *didn't* install your own callbacks, OpenSSl would still call Python's callback.

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