Error in `/usr/bin/python': double free or corruption (out): 0x00007f7c3c017260

python numpy flask race-condition apscheduler

I had a similar issue.

I had an unused dependency: spacy == 1.6.0removing it solved the issue.(maybe upgrading spacy version could also work)

spacy is written in Cython - an optimising static compiler for Python. So it might be related to sum bug memory allocation in spacy implementation.

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