I was getting a crash during module init of a cython module if a garbage collection happens between a call to __Pyx_CyFunction_InitDefaults and the code to populate the defaults.
The attached patch fixes the crash. This bug affects at least Cython 0.18 and 0.17.1. __Pyx_CyFunction_InitDefaults was not completely zeroing the newly allocated 'defaults' buffer.
cython.patch
Description: Binary data
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