Hi all, Pauli just opened a nice pull request [1] to add overlap detection to the new iterator, this means adding a new iterator flag:
`NPY_ITER_COPY_IF_OVERLAP` If passed to the iterator (also exposed in python), the iterator will copy the operands such that reading and writing should only occur for identical operands. For now this is implemented by always copying the output/writable operand (this could be improved though, so I would not say its fixed API). Since adding this flag is new API, please feel free to suggest other names/approaches or even decline the change ;). This is basically a first step, which should be easily followed by adding overlap detection to ufuncs, removing traps such as the well (or not so well known) `a += a.T`. Other parts of numpy may follow one by one. The work is based on his older awesome new memory overlap detection implementation. If there are no comments, I will probably merge it very soon, so we can look at the follow up things. - Sebastian [1] https://github.com/numpy/numpy/pull/8026
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