Hi, GHC's Git history has (mostly) a good track record of having properly attributed authorship information in the recent past; Some time ago I've even augmented the .mailmap file to fix-up some of the pre-Git meta-data which had mangled author/committer meta-data (try 'git shortlog -sn' if you're curious) However, I just noticed that http://git.haskell.org/ghc.git/commitdiff/322810e32cb18d7749e255937437ff2ef9... landed recently, which did change a significant amount of code, but at the same time the author looks like a pseudonym to me (and apologies if I'm wrong). Other important projects such as Linux or Samba, just to name two examples, reject contributions w/o a clearly stated origin, and explicitly reject anonymous/pseudonym contributions (as part of their "Developer's Certificate of Origin" policy[1] which involves a bit more than merely stating the real name) I believe the GHC project should consider setting some reasonable ground-rules for contributions to be on the safe side in order to avoid potential copyright (or similiar) issues in the future, as well as giving confidence to commercial users that precautions are taken to avoid such issues. Comments? Cheers, hvr [1]: See http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Document...