Warning of memory leak when running test suite

[h-vetinari]

Summary

While running the test suite in https://github.com/conda-forge/faiss-split-feedstock/pull/26, I noticed that there were warnings about a memory-leak:

swig/python detected a memory leak of type 'std::unordered_multimap< faiss::Index::idx_t,faiss::Index::idx_t > *', no destructor found.

The same happened for all jobs of the CI run for 1.6.5.

Platform

OS: linux / osx / win

Faiss version: 1.6.5, 1.7.0

Installed from: conda-forge

Running on:

• [x] CPU
• [x] GPU

Interface:

• [ ] C++
• [x] Python

Reproduction instructions

conda install -c conda-forge faiss=1.6.5
# copy folder "tests/" into the working directory (not part of the package)
python -m unittest discover tests

[mdouze]

This is a known bug. I have not looked into how to fix it, but it is low on our priority list.