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pthread_key_create() is dangerous
source link: https://0pointer.net/blog/projects/pthread-key-create.html
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If you use pthread_key_create() with a non-NULL destructor parameter (or an equivalent TLS construct) in a library/shared object then you MUST link your library wth -z nodelete (or an equivalent construct).
If you don't, then you'll have a lot of fun (like I just had) debugging segfaults in the TLS destruction logic where functions are called that might not even exist anymore in memory.
Now don't tell me I hadn't told you.
(Oh, and I hope I don't need to mention that all GObject-based libraries should link with -z nodelete anyway, for making sure the type system doesn't break.)
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