Hi!

Recently I've found that the following code causes segmentation fault:

cdef object f
del f
print f

So the question is: how should that work?

global objects are implicitly initialized to None and no CF and no cf
analysis is performed for it.

So I see three options here:

1. prohibit cglobal deletion
2. set it back to None
3. check for a null value at every reference and assignment

-- 
vitja.
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