jakevdp/scikit-learn — comment on commit 6fa79554d77a35e81f444551e9c7482691c42dd1
File: sklearn/__init__.py line 54
By GaelVaroquaux:

> If `_check_build` is catching this, then maybe the further check is superfluous? I have to admit I don't entirely understand why @amueller was seeing the problem he did...

I am not certain, but I think that a warning doesn't hurt :)