Created attachment 516694 [details]
When emerging dev-lang/ghc-8.0.2 the following QA issue is detected by portage:
> QA: other
> Problems with installed bash completions were found:
> ghci: missing alias (symlink) for completed command.
> For more details on installing bash-completions, please see:
Created attachment 516696 [details]
emerge --info ghc
Thanks for filing the bug! I kept forgetting to tweak the ebuild.