I think that if we change either path.Math or filepath.Match, we should change both. For them to be different would just be unnecessarily confusing. So closing this as a dup of #11862.

Change https://golang.org/cl/185097 mentions this issue: path: Updated Match function to support double star

Yes, that's true but at the same time, they are two different packages - should it not be possible to update them separately?

We can update them separately in the sense of doing it as two different patches. But the decision as to whether to update them or not should be made for both packages. And if we do decide to update them then both packages should be updated in the same release.