[Community] Shapely thread-safety?

[Allen Bierbaum]

Is shapely thread-safe?  I ask because my application is seg faulting
inside geos when I try to use shapely from multiple threads.  At first
it was hard to reproduce, but I was finally able to write a
reproducible test case that fails every time I run it (see attached).

Can anyone shed some light on this?

Thanks,
Allen
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