Fix memory leak when calling Python from Rust #1806
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mejrs
approved these changes
Aug 17, 2021
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The owned pointer isn't dereferenced
That's not what Py_DECREF does (see https://docs.python.org/3/c-api/refcounting.html for more on refcounting).
What happened here was that the raw pointer never had its reference count decremented, so the inner value was leaked and never deallocated. It's similar to mem::forget'ing a Rc in Rust.
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Thanks for the correction! Updated the comment on the PR |
birkenfeld
requested changes
Aug 18, 2021
birkenfeld
approved these changes
Aug 18, 2021
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auto-merge works! 🎉 |
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Python::run_codetransforms the Rust code string to an owned pointer. The reference count to the owned pointer isn't decremented, which results in a memory leak when calling Python from Rust.This PR adds a missing
Py_DECREFcall on the owned pointer which fixes the memory leak.Fixes #1801.
Thanks to @mejrs for the tip on the fix.