does r-cran-afex violate the GPL?

[Jonathon Love <jon@thon.love>]

hi,

i recently asked this question on debian-legal, but i don't seem to have
got much of a response.

https://lists.debian.org/debian-legal/2015/09/msg00024.html

i'm talking with upstream about the r-cran-afex package, and it seems to
me that it violates the GPL, but upstream isn't convinced.

afex is GPL >= 3, and it depends on (and calls functions from) R
packages which are GPL2-only.

is this "textbook GPL violation"?

and if so, how should i proceed?

with thanks

jonathon

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