A while ago I was browsing the Python bug tracker, and I stumbled upon this bug – “memoryview to freed memory can cause segfault”. It was created in 2012, originally present in Python 2.7, but remains open to this day, 10 years later. This piqued my interest, so I decided to take a closer look.
understand anything happening in CPython it’s important to have an understanding of how objects are represented internally. I’ll give a brief introduction here, but there are several (better) resources on the internet for learning about this.
Everything in Python is an object. CPython represents these objects with the PyObject struct. Every type of object extends the basic PyObject struct with their own specific fields.
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